'Ob stars' diaporamas de présentation

High Angular Resolution Imaging of the Galactic Center

High Angular Resolution Imaging of the Galactic Center. Andrea Ghez University of California Los Angeles Collaborators E. E. Becklin, G. Duchene, S. Hornstein, J. Lu, M. Morris, A.Tanner, S. Wright. Image courtesy of 2MASS. Key Questions. Astrometry (Source Position) Questions

748 views • 51 slides

Modern Astronomy Stars & Galaxies Lecture 7

Modern Astronomy Stars & Galaxies Lecture 7. The Milky Way Galaxy: Putting it all together Geraint F. Lewis University of Sydney 2007. Outline. Galactic Structure Where are the stars? Rotation and spiral structure Into the middle Formation of the Galaxy Milky Way and friends.

636 views • 51 slides

X-ray Emission from Massive Stars

X-ray Emission from Massive Stars. David Cohen Swarthmore College. Outline. Young OB stars produce strong hard X-rays in their magnetically channeled winds After ~1 Myr X-ray emission is weaker and softer: embedded wind shocks in early O supergiants

513 views • 51 slides

The observed mass loss vs. metallicity relation

The observed mass loss vs. metallicity relation. Alex de Koter. University of Amsterdam. The observed mass loss vs. metallicity relation. Alex de Koter Rohied Mokiem , Chris Evans , S. Smartt, J. Puls, A. Herrero, F. Najarro, M.R. Villamariz. University of Amsterdam.

574 views • 50 slides

Modern Astronomy Stars & Galaxies Lecture 7

Modern Astronomy Stars & Galaxies Lecture 7. The Milky Way Galaxy: Putting it all together Geraint F. Lewis University of Sydney 2005. Outline. Galactic Structure Where are the stars? Rotation and spiral structure Into the middle Formation of the Galaxy Milky Way and friends.

498 views • 42 slides

X-rays from Magnetically Channeled Winds of OB Stars

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X-rays from Magnetically Channeled Winds of OB Stars

401 views • 40 slides

Chasing disks around massive stars with Malcolm

Chasing disks around massive stars with Malcolm. Disks and the formation of OB stars How HMCs studies turned into quest for disks Before ALMA: disks versus toroids The ALMA era: disks around B stars The current & future challenge : disks around O stars.

317 views • 31 slides

Tracing Galactic structure with obscured luminous stars

Madrid March 2012. Tracing Galactic structure with obscured luminous stars. Ignacio Negueruela. Madrid March 2012. Tracing Galactic structure with obscured luminous stars. + High-mass stars in the infrared. Ignacio Negueruela. Francisco Najarro Artemio Herrero. Outline.

468 views • 30 slides

A Survey of Orion A with XMM and Spitzer: SOXS

A Survey of Orion A with XMM and Spitzer: SOXS. Scott Wolk Harvard-Smithsonian Center for Astrophysics. In collaboration with: Tom Megeath, Lori Allen, John Bally, Luisa Rebull Marc Gange, Guisi Micela, Salvo Sciortino, Lee Hartman, Fred Walter,

318 views • 25 slides

A Survey of Orion A with XMM and Spitzer: SOXS

A Survey of Orion A with XMM and Spitzer: SOXS. Scott Wolk Harvard-Smithsonian Center for Astrophysics. In collaboration with: Tom Megeath, Lori Allen, John Bally, Luisa Rebull Marc Gange, Guisi Micela, Salvo Sciortino, Lee Hartman, Fred Walter,

256 views • 25 slides

A cosmic abundance standard

A cosmic abundance standard. from massive stars in the Solar Neighborhood. Fernanda Nieva. Norbert Przybilla (Bamberg-Erlangen) & Keith Butler (LMU). Cosmic abundance standard input for any model that requires initial or local elemental abundances: massive star evolution yields

365 views • 23 slides

Exploring the Local Group massive star content with 2-4m telescopes at ORM and CAHA

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In this respect a juicy anecdote

Massive stars, massive close binaries, Wolf-Rayet stars, stellar winds, mass loss in hot stars, stellar wind theories were hot topics during the eighties and many symposia were devoted to this types of research Theories -sometimes controversial- were developed and defended with enthusiasm.

306 views • 19 slides

The Upper Main Sequence

The Upper Main Sequence. O stars OBN and OBC stars Wolf-Rayet stars. Meredith Danowski Astronomy 411 Feb. 14, 2007. Oh! O-stars. Massive, bright, hot, bluest, shortest lifetime (3-6 Myr) Rarest main sequence stars (1 in 32,000) 30,000-60,000K 20-100 Msun ~15 Rsun. Zeta-Puppis.

177 views • 17 slides

Search for candidate main target early B stars

Search for candidate main target early B stars. Karolien Lefever, Katrien Uytterhoeven, Carla Maceroni, Josefina Montalban, Ennio Poretti, Anwesh Mazumdar, Maryline Briquet, Mario Ausseloos, Joris De Ridder, Caroline Schoenaers, and Conny Aerts. Strategy.

233 views • 15 slides

HOW MANY NEUTRON STARS ARE BORN RAPIDLY ROTATING?

HOW MANY NEUTRON STARS ARE BORN RAPIDLY ROTATING?. NIKOLAOS STERGIOULAS. DEPARTMENT OF PHYSICS ARISTOTLE UNIVERSITY OF THESSALONIKI. ENTAPP, 23/1/2006. WHY DO WE NEED RAPID ROTATION?. Several GW emission mechanisms during NS formation rely on rapid rotation :.

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Summary

149 views • 1 slides