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                         *Third Announcement*

                        IAU Symposium No. 250

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                   MASSIVE STARS AS COSMIC ENGINES



                   Grand Hyatt, Kauai, Hawaii, USA 

                        10-14 December 2007



                  http:///www.ifa.hawaii.edu/iau250

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Scope of the Symposium:

----------------------



The symposium will focus on how massive stars shape the Universe from the 

nearby Universe to high-redshift galaxies and the first generations of 

stars. Massive stars form in starbursts, pollute the interstellar medium 

(ISM), inject energy and momentum via their stellar winds and 

core-collapse supernovae (SNe), drive the ISM out of galaxies, polluting 

the intergalactic medium. Direct detection of massive stars (via the UV 

continua and spectral wind lines) and of the products of their 

nucleosynthesis provides some of the most stringent constraints on the 

physical properties of galaxies at high redshifts, whether identified via 

their emission at a variety of wavelengths or by the absorption they 

produce in quasar spectra. Within the past few years, a direct connection 

has been established between certain core-collapse SNe and Gammay Ray 

Bursts (GRBs), supporting the collapsar model in which the GRB results 

from the death throes of a rapidly rotating Wolf-Rayet star.



Scientific Programme:

--------------------



The oral scientific programme is now finalized (see below), and is divided 

between 25 invited review talks (30 + 5 min) and 32 contributed talks (15 

+ 5 min), as listed on the meeting website, plus a summary talk by Claus 

Leitherer. General Discussion sessions are available after each 

session. We ask all speakers to submit an abstract via the meeting 

registration page no later than 15 Nov 2007 for inclusion in the abstract 

booklet. 



We ask all speakers to provide us with their Powerpoint/OpenOffice or Keynote 

presentations, preferably via USB flash drives, in advance of their talk: 

at the end of the afternoon session for next-morning talks, and at the end 

of the morning session for the afternoon talks. Speakers for the first 

morning of the conference are asked to send us (e.g. via e-mail or FTP) 

their presentations ahead of the start of the conference. Your adherence 

to these requirements will be greatly appreciated to ensure a smooth 

transition between speakers. We will use our own Mac and Windows-based 

computers to test and run the presentations. No Linux support will be 

offered.



The main conference room is located in the Grand Ballroom. An adjacent 

space, also part of the Grand Ballroom, will be used for poster viewing 

and for the morning/afternoon coffee breaks. A large number of poster 

presentations are also anticipated, whose titles/abstracts need to be 

entered via the meeting registration page no later than 15 Nov 2007 for 

review by the SOC. Due to space limitations we can only accept a single 

poster per participant (capacity may become available at the meeting for 

additional posters but this can not be guaranteed in advance). Please note 

that the symposium proceedings will include poster titles and abstracts 

submitted via the meeting registration page before 15 Nov 2007. 



Poster size limits are 2.7 x 4 feet = 80 x 120 cm = width x height. Prizes 

will be awarded to a poster from each scientific session, which will 

include (a) a brief oral presentation during discussion sessions (poster 

presenters may may wish to bring their poster on a USB storage device from 

which they could quickly produce a couple of slides); (b) an extended page 

limit in the symposium proceedings. The overall poster competition winner 

will receive a further prize.



Programmes for specialist sessions Sun 9 Dec on `Massive stellar evolution 

at low metallicity' (9:30-13:00, organizer: Georges Meynet) and `Magnetic 

massive stars' (14:30-18:10, organizer: Richard Townsend) are also listed 

in the appendix below.



Venue:

-----



The symposium will be held in the Grand Hyatt Hotel 



http://kauai.hyatt.com/groupbooking/kauai2007astr



which is located in the southern part of the island of Kauai, Hawaii, USA. 

Participants are expected to arrive on Kauai not later than Sunday 9 

December, and to depart from Kauai not earlier than Saturday 15 December 

2007. Participants wishing to take part in the specialist Discussion 

Sessions on Sunday 9 December will need to arrive on Saturday 8 December. 

All symposium participants will be lodged at the Grand Hyatt, since there 

are no other nearby hotels.



The negotiated room rate is US$165 + 11.42% tax = US$183.84 per night. 

This is for single or double occupancy. This rate is valid from Dec 6 

through Dec 16. Rates outside this period revert to the normal rates 

starting around US$400 + tax. To take advantage of the discounted rates 

remember to make your reservation by 10 Nov 2007 through the link 

available at the meeting website:



http://www.ifa.hawaii.edu/iau250/Hotel_Reservations.htm



Please note that a 2 night deposit is charged immediately upon booking.

We offer a roommate finder to help  you locate persons to share your

hotel room with:



http://www.meetinhawaii.com/iau250/roommate/index.cfm



When making your hotel reservation, you will notice that a $15 resort fee 

(per room per day) is automatically included. For our conference this fee 

(mandatory for all hotel guests) has been waived, but you still need to 

specify at *check-in* to remove that charge if you do not want to pay for 

it. The fee gives access to: local and toll-free phone calls, self and 

valet parking (self parking would be US$8/day, valet parking US$10/day), 

incoming faxes, newspaper, 1-hour per day at the tennis court, daily 

fitness access to the spa and 10% discounts on selected merchandise. The 

hotel will charge a mandatory porterage fee of $6.50+tax per person per 

stay (not per day).



Wireless internet access to the rooms is US$14.95/day. We will provide 

wireless connectivity in the conference room, limited to 100 simultaneous 

users. A few computers will be available to provide internet access.



Travel/Transportation:

---------------------



The hotel is served by Lihue Airport (code LIH), located about 15 miles to 

the north. There are direct flights between Lihue airport and the US west 

coast (SFO, LAX), plus regular services to Honolulu (code HNL) on the 

island of Oahu, about 30 minutes flying time away. 



The Hyatt resort does not provide a shuttle service to/from the Lihue 

airport. Conference participants are therefore expected to either rent a 

car (the usual rental car companies are located just outside of the 

airport terminal) or hire a taxi for the 15-mile ride.  If you wish to 

share a taxi with other participants, we encourage you to meet before 

calling a taxi: the driver will charge you one fare (around US$35) for the 

whole group. To facilitate in finding companions, we have established a 

'taxi mate finder' service together with the roommate finder:



http://www.meetinhawaii.com/iau250/roommate/index.cfm



All participants, particularly those from outside of the US are advised to 

make travel arrangements as soon as is practical, to ensure the most 

economical airfares to/from Kauai. Note that the Honolulu marathon will 

take place on Sunday 9 Dec, so you may wish to avoid travelling through 

Oahu on 8 Dec. The state of Hawaii enforce strict rules upon the 

importation of fruit, plants and other agricultural items, so be prepared 

to open your baggage for x-ray machine inspection.



Because of security procedures, applications for visas to visit the US may 

take longer to process than in the past. We strongly recommend applying 

for a visa as early as possible (at least 3 months before the visa is 

needed). It may take even longer for citizens of a few countries. Please 

check with your local US consulate or embassy to make sure that you apply 

early enough to avoid any problems.



Registration Fee:

----------------



Registration by all participants, including invited speakers, LOC and SOC 

members is mandatory.  



http://www.meetinhawaii.com/iau250/index.cfm?fuseaction=register.start&



If you have pre-registered, you should have received an email on 24 Sep 

2007 regarding registration, payment of (i) US$250 conference fee (US$350 

after 31 Oct 2007) which includes the opening reception, food and 

beverages during the breaks and a copy of the symposium proceedings, (ii) 

US$70 Conference banquet for participants and accompanying guests; (iii) 

US$45 Opening reception for accompanying guests only. Note LOC and SOC 

members are exempt from payment of registration fee.



Payment may be made with credit cards (not American Express), processed 

securely through PayPal's website. When you are finished with your payment 

on the PayPal site, click on 'Return to Site' to receive a confirmation 

number for your transaction. Please save this information. The link 

provided on this last page allows you to edit the information you 

submitted. (If you cannot use credit cards to submit your payment, please 

e-mail iaus250@ifa.hawaii.edu).



Opening reception:

-----------------



The opening reception will be held from 7:30 to 9pm in the Grand 

Promenade, just in front of the Grand Ballroom, and in the adjacent Grand 

Garden. During the reception, appetizers will be served. One drink ticket 

will be available for each participant and paying guest (US$45). 

Additional drinks will be charged to the drinkers.



Registration will be from 6-9pm on Sunday, Dec 9, in the Grand Promenade. 

(This appears to be a `Grand' Meeting!). All recipients of IAU grants (no 

more awards are anticipated at this time) will be reimbursed upon 

registration. Early registration will also be possible, prior to the 

special discussion sessions on Sunday between 9-10am and 2-3pm.



Conference Banquet:

------------------



The conference dinner will take place on Thursday, Dec 13, 6:00-8:30 PM in 

the form of a luau, which features "authentic cuisine, dance, crafts and 

more". This event is subsidized by the IfA, and costs US$70 per adult.



Meals:

-----



There are several restaurants and lounges at the Hyatt. A complete 

listing, with business hours and menus (with prices), can be found at



http://kauai.hyatt.com/hyatt/hotels/entertainment/restaurants/index.jsp



Expect to be charged around US$10 to US$15 (+tax) for salads, soups or 

sandwiches, and US$25-$40 (+tax) for main courses. Breakfast is offered at 

various restaurants, from US$3.75 (single coffee) to US$27 (buffet). When 

purchasing food/beverages, please remember that a gratuity of 15% will be 

added, as well as a 11.42% tax (a total of 28%).



There are virtually no low-cost restaurants located outside the Hyatt 

within reasonable walking distance.



Not just massive stars:

----------------------



We hope you will enjoy the conference, as well as the beauty of the island 

of Kauai. The resort offers a nice beach, pools, and many on-site 

activities (golf, tennis, scuba lessons, flower lei making, ukulele 

lessons, coconut painting, live jazz, etc). For a taste of Kauai, you may 

want to take advantage of the free Wednesday afternoon. The hotel 

concierge can help you organize boat or helicopter tours to the Na Pali 

coast, whale-watching cruises, visits to Waimea Canyon, surfing, horseback 

and Harley-Davidson riding, sky diving, ultralight flying, car-crash 

testing, and even more. Car rental is available at the hotel.



Proceedings:

-----------



The proceedings will be published by the IAU publisher, Cambridge 

University Press, and edited by F. Bresolin, P.A. Crowther & J. Puls. 

Limits are 12 pages for invited review talks and 6 pages for contributed 

talks, to be submitted no later than 15 Jan 2008. Style files and 

instructions for auhtors can be found at 



ftp://ftp.sron.nl/karelh/UPLOADS/IAU-CUP.dir/authors.dir 



Poster competition winners from each scientific session will also be 

eligible for a 6 page limit - otherwise poster titles and brief abstracts 

submitted via the meeting registration page in advance of 15 Nov 2007 will 

be included in the proceedings. Submission details will be distributed at 

the symposium, at which copyright forms need to be completed and passed 

onto LOC staff.



Strict deadlines will be enforced since the contract with CUP stipulates 

that proceedings are published within 6 months of the symposium. CUP needs 

three months for the production process, leaving one month for authors and 

the following two months for editors to complete their tasks.



Deadlines:

---------



31 Oct 2007          Deadline for payment of US$250 registration fee 

                     (US$350 thereafter).

10 Nov 2007          Deadline for hotel reservations at reduced room rate.

15 Nov 2007          Deadline for abstracts for inclusion in meeting 

                     booklet (submitted via registration page). Poster 

                     abstracts to be included in proceedings.

09 Dec 2007          Specialist discussion sessions and welcome reception.

10 Dec 2007          Start of Symposium.

14 Dec 2007          End of Symposium.

15 Jan 2008          Delivery of final manuscripts from review and 

                     contributed speakers to the Editors (details upon 

                     registration).



Organization:

------------



The symposium is sponsored and supported by the IAU Divisions IV (Stars), 

VI (Interstellar Matter), VII (Galactic System), VIII (Galaxies and the 

Universe), and XI (Space and High Energy Astrophysics); and by the IAU 

Commissions No. 28 (Galaxies), No. 29 (Stellar Spectra), No. 34 

(Interstellar Matter), No. 35 (Stellar Constitution), No. 36 (Theory of 

Stellar Atmospheres), No. 37 (Star Clusters and Associations), and No. 44 

(Space and High Energy Astrophysics).



Scientific Organizing Committee: 

------------------------------- 



P.A. Crowther (UK, co-chair), M.A. Dopita (Australia), J.P.U. Fynbo 

(Denmark), E.K. Grebel (Switzerland), T.M. Heckman (USA), D.A. Hunter 

(USA), G. Koenigsberger (Mexico), R.P. Kudritzki (USA), N. Langer 

(Netherlands), A.I. MacFadyen (USA), F. Matteucci (Italy), G. Meynet 

(Switzerland), A.F.J. Moffat (Canada), K. Nomoto (Japan), M. Pettini (UK), 

J. Puls (Germany, co-chair).



Local Organizing Committee:

--------------------------



F. Bresolin (chair), L. Clark, L. Good, E. Levesque, K. Teramura, K. 

Toyama, V. U, M. Urbaneja, K. Uyehara, G. Wynn-Williams



Contact information:

-------------------



LOC Contact:



  Dr Fabio Bresolin

  Institute for Astronomy

  2680 Woodlawn Drive

  Honolulu HI 96822

  USA

  e-mail: iaus250@ifa.hawaii.edu



SOC Contact:



  Prof Paul Crowther

  Dept of Physics & Astronomy

  University of Sheffield

  Hicks Building, 

  Hounsfield Rd,

  Sheffield, S3 7RH, UK

  e-mail: paul.crowther@sheffield.ac.uk



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Sun 09 Dec

**********

Special Discussion Sessions:

---------------------------

Massive stellar evolution at low metallicity



09:30 Welcome (Georges Meynet)

09:40 The Nucleosynthetic Products of the First Massive Stars 

      (Ann Boesgaard)

10:00 The Onfp Class in the Magellanic Clouds (Nolan Walborn)

10:20 Rotational mixing in Magellanic Cloud massive stars (Ian Hunter)

10:40 The low metallicity effects on the B and Be stars 

      (Christophe Martayan)

11:00 Continuum driven winds from super-Eddington massive stars.

      (Allard Jan van Marle)



11:20 COFFEE



11:40 Wind-clumping in low-Z environment: theory and observations

      (Sergei Marchenko)

12:00 Mass loss at very low Z (Jorick Vink)

12:20 Pop III stellar models (Marco Limongi)

12:40 Metal-Poor Galaxies and GRB Hosts: Modeling the Low-Metallicity

      Stellar Populations (Emily Levesque)



13:00 LUNCH



Magnetic massive stars



14:30 Optical, Ultraviolet, and X-Ray Spectral Morphology of Hot Magnetic 

      Stars (Nolan Walborn)

14:50 The mysterious Of?p class and the magnetic O-star Theta^1 Ori C

      (Yael Naze)

15:10 Theta^1 Ori C (Alex Fullerton*) 

15:30 Observations of magnetic fields of massive stars with FORS1 at the 

      VLT (Swetlana Hubrig)

15:50 X-ray emission and the incidence of magnetic field in massive stars 

      of the Orion Nebula Cluster (Veronique Petit)



16:10 COFFEE



16:30 X-rays from Magnetically Channeled Winds of OB Stars (David Cohen)

16:50 MHD Simulation of Magnetic Channelling and Spindown in Rotating 

      Hot-Star Winds (Asif ud-Doula)

17:10 Rigid-Field Hydrodynamics models for the magnetospheres of strongly 

      magnetic massive stars (Rich Townsend)

17:30 On MHD rotational transport, instabilities and dynamo 

      action in stellar radiation zones (Stephane Mathis)

17:50 Radiation Magneto-Hydrodynamics Simulations of Core-Collapse 

      Supernovae (Luc Dessart)

18:10 END



19:30-21:00 Symposium opening reception



Mon 10 Dec

**********

IAU Symposium 250:

-----------------



Session I (Atmospheres of massive stars)



08:25 Welcome

08:30 Massive Stars as cosmic engines through the ages (Andre Maeder)

09:05 X-ray emission from O stars (David Cohen)

09:25 Physical and wind properties of OB stars (Jo Puls)

10:00 The metallicity dependence of the mass-loss rate of early-type

      massive stars (Alex de Koter)



10:20 COFFEE



10:50 Properties of Wolf-Rayet stars (Paul Crowther)

11:25 WR wind models from hydrodynamic model atmospheres (Goetz Graefener)

11:45 LBVs - Mass loss close to the Eddington limit (Stan Owocki)

12:20 Pulsation-initiated mass loss in LBVs: A parameter study (Jay Onifer)



12:45 LUNCH



15:00 What do we really know about massive star winds? (John Hillier)

15:20 The physical properties of red supergiants (Phil Massey)

15:55 The evolutionary state of the cool hypergiants (Roberta Humphreys)



16:15 COFFEE



16:45 Massive binaries (Tony Moffat)

17:20 3D SPH simulations of colliding winds in eta Car (Atsuo Okazaki)

17:40 DISCUSSION



Tue 11 Dec

**********

Session II (Physics and evolution of massive stars)



08:30 Recent developments in physics of massive stars (Georges Meynet)

09:05 Can pulsational instabilities impact a massive stars' rotational

      evolution (Richard Townsend)

09:25 Close binary evolution (Norbert Langer)

10:00 The effect of massive binaries on stellar populations and SN

      progenitors (John Eldridge)



10:20 COFFEE



10:50 Core-collapse supernovae: Physics and Observation (Adam Burrows)

11:25 Episodic mass-loss and pre-SN circumstellar envelopes (Nathan Smith)

11:45 The progenitor stars of core-collapse SNe (Steve Smartt)

12:05 Magnetars: Massive star progenitors (Bryan Gaensler)



12:40 LUNCH



15:00 Can very massive stars avoid pair-instability SN? (Sylvia Ekstrom)

15:20 Long GRBs - core-collapse SN connection (Andrew MacFadyen)

15:55 The nature of GRB progenitors: Observational constraints 

      (Kris Stanek)



16:15 COFFEE



16:45 Stellar evolution at low metallicity (Raphael Hirschi)

17:20 Evolution of progenitor stars in Type Ib/C SN and long GRBs 

      (Sung- Chul Yoon)

17:40 DISCUSSION 



Wed 12 Dec

**********

Session III (Massive stellar populations in the nearby Universe) 



08:30 Young massive clusters (Don Figer)

09:05 Properties of massive stars in the Galactic center (Fabrice Martins)

09:25 Metallicity studies of massive stars in the IR: Unveiling obscured

       clusters of our Galaxy (Paco Najarro)

09:45 Massive stars in nuclei and arms of spiral galaxies (Fabio Bresolin)



10:20 COFFEE



10:50 UCHII regions and newly born O-type stars (Peter Conti)

11:10 The effects of N-body stellar dynamics on the early evolution of the

      massive star population of dense star clusters (Dany Vanbeveren)

11:30 Massive stars in dwarf and irregular galaxies (Eva Grebel)

12:05 Westerlund 1 as a template for massive star evolution (Ignacio

      Negueruela)

12:25 One hundred 30 Dor's: Isthe Milky Way different or are we somehow

      missing them? (Margaret Hanson)

12:45 LUNCH/EXCURSIONS



Thu 13 Dec

**********

08:30 Individual massive stars in external galaxies (Rolf Kudritzki)

09:05 VLT surveys of WR populations in spiral galaxies M83 and NGC1313

      (Lucy Hadfield)

09:25 DISCUSSION

Session IV (Hydrodynamics/feedback from massive stars in galaxy evolution)

09:50 Massive stars and their ionizing radiation (Rosa Gonzalez-Delgado)



10:25 COFFEE



10:55 The evolution of the circumstellar and interstellar medium around

      massive stars (Jane Arthur)

11:15 Bubbles and super-bubbles: Theory and observation (You-Hua Chu)

11:50 Spitzer and ISO observations for studying the mass-loss histories and

      wind-wind interactions of massive stars with circumstellar nebulae

      (Pat Morris)

12:10 Massive star feedback: Starbursts and superwinds (Mike Dopita)



12:45 LUNCH



15:00 Massive stars, super star clusters and feedback in starbursts 

      (Jay Gallager)

15:20 Gemini IFU observations of Galactic outflows in starburst galaxies

      (Linda Smith)

15:40 Radiative feedback in starburst galaxies (Sally  Oey)



16:00 COFFEE



16:30 Nucleosynthesis role of massive stars (Francesca Matteucci)

17:05 Detailed nucleosynthesis yields from the explosions of massive

      stars (Carla Froehlich)

17:25 DISCUSSION 



18:00 CONFERENCE BANQUET (Luau)



Fri 14 Dec

**********

Session V (Massive stars as probes of the early Universe)



08:30 Massive stars as tracers of z=1-5 star forming galaxies (Max Pettini)

09:05 Massive star populations in z=3-7 starbursts (Daniel Schaerer)

09:25 Star forming galaxies at z>5 (Yoshi Taniguchi)

10:00 Core-collapse SN as dust producers in the early Universe (Rubina 

      Kotak)



10:20 COFFEE



10:50 Gamma Ray Bursts as probes of high-z galaxies (Johan Fynbo)

11:25 Probing the ISM and stellar environments of GRB host galaxies

      (Mirka Desauges-Zavadsky)

11:45 The connection between GRBs and extremely metal-poor stars as a 

      nucleosynthesis probe of the early universe (Ken'ichi Nomoto)

12:05 The first stars (Volker Bromm)

12:40 Imprint of the first stars era in the cosmic IR background  

      fluctuations (Alexander Kashlinsky)



13:00 LUNCH



15:00 Imaging and spectroscopy with the JWST (George Sonneborn)

15:20 E-ELT (Sandro D'Odorico)

15:55 DISCUSSION



16:20 COFFEE



16:50 Meeting Summary (Claus Leitherer)