'Ii regions' diaporamas de présentation

669 views • 56 slides

The Milky Way

484 views • 41 slides

Chapter 19: Between the Stars: Gas and Dust in Space

Chapter 19: Between the Stars: Gas and Dust in Space. Gas and Dust in Space. To understand how stars are born, we begin by learning about the raw material from which they are made. Interstellar matter : gas and dust that lies in the regions between stars.

501 views • 31 slides

NEW LOCAL IGM RESULTS FROM THE COSMIC ORIGINS SPECTROGRAPH

NEW LOCAL IGM RESULTS FROM THE COSMIC ORIGINS SPECTROGRAPH JOHN STOCKE, U of COLORADO for the COS GTO Team. Collaborators: Mike Shull, Jim Green, Charles Danforth & Brian Keeney at Colorado; Blair Savage and Anand Narayanan at Wisconsin. OUTLINE OF THE TALK.

385 views • 27 slides

Ionization

Ionization. 24 March 2003 Astronomy G9001 - Spring 2003 Prof. Mordecai-Mark Mac Low. Photoionization. For hydrogenic ionic stages, the ionization cross-section ( Dopita & Sutherland, 2003). Recombination. ? rec can be derived from ? i using detailed balance.

526 views • 26 slides

A fast pseudo-3D photoionization code for aspherical PNe and HII regions

377 views • 26 slides

New Spitzer Results for Neon and Sulphur in NGC 6822

New Spitzer Results for Neon and Sulphur in NGC 6822. Reggie Dufour AU 10/07/2009. Neon and Sulphur Emission Lines in H II Regions Optical: [Ne III] 3869, 3969 A [S II] 6717, 6730 A [S III] 6311, 9069, 9531 A (compare against H ? , H ? , etc.)

233 views • 23 slides

4 He Abundance from HII Regions

4 He Abundance from HII Regions. Overview. Theory and theoretical predictions of Y p Observational Technique. Relative strengths of He I and H emission lines. Physical parameters and their effects. Difficulties What do observations tell us?. Early Universe, before BBN.

260 views • 16 slides

Finding the First Cosmic Explosions

Finding the First Cosmic Explosions. Daniel Whalen McWilliams Fellow Carnegie Mellon University. My Collaborators. Chris Fryer (LANL) Lucy Frey (LANL) Wes Even (LANL) Daniel Holz (University of Chicago) Massimo Stiavelli (STSci) Alexander Heger (University of Minnesota)

259 views • 15 slides

The potential for Galactic Plane Surveys with LOFAR

144 views • 14 slides

Direct Physical Diagnostics of Triggered Star Formation

Direct Physical Diagnostics of Triggered Star Formation. Rachel Friesen NRAO Postdoctoral Fellow North American ALMA Science Center C. Brogan, R. Indebetouw , C. Cyganowski , E. Churchwell , M. Wolfire , B. Whitney , C. Watson, W. Dirienzo.

190 views • 8 slides

FUSE observations of extragalactic H 2

167 views • 6 slides

References

Henry Lee (hlee@astro.umn.edu). Starbursts - From 30 Doradus to Lyman Break Galaxies, Cambridge. The Dwarf Starburst Galaxy NGC 1705 : New H II Region Element Abundances & Reddening Variations Near the Center. Henry Lee & Evan D. Skillman University of Minnesota.

128 views • 1 slides