Far‐Ultraviolet Observations of Molecular Hydrogen in the Diffuse Interstellar Medium of Starburst Galaxies

2004 ◽  
Vol 612 (2) ◽  
pp. 825-836 ◽  
Author(s):  
Charles G. Hoopes ◽  
Kenneth R. Sembach ◽  
Timothy M. Heckman ◽  
Gerhardt R. Meurer ◽  
Alessandra Aloisi ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Molecular Hydrogen ◽  
Starburst Galaxies ◽  
Far Ultraviolet ◽  
Ultraviolet Observations

scholarly journals Detection of Escaping Lyman Continuum Radiation in Two Local Starbursts Using FUSE

2006 ◽  
Vol 2 (S235) ◽  
pp. 316-316
Author(s):  
E. Leitet ◽  
N. Bergvall ◽  
B-G Andersson ◽  
E. Zackrisson
Keyword(s):  
Interstellar Medium ◽  
Starburst Galaxies ◽  
Compact Galaxy ◽  
Archival Data ◽  
Continuum Radiation ◽  
Neutral Gas ◽  
Lyman Continuum ◽  
Profile Fitting ◽  
First Results ◽  
Far Ultraviolet

AbstractWe present the detection of escaping Lyman Continuum (LyC) radiation from two local starburst galaxies, Tol 1247-232 and Tol 0440-381, using archival data from the Far Ultraviolet Spectroscopic Explorer (FUSE). From profile fitting of metal lines, high densities of neutral gas were derived for both galaxies, implying that the LyC radiation is escaping from holes in the interstellar medium. The first results for one of the galaxies, Tol 1247-232, give an escape fraction (fesc) of 17–35%. These new detections, together with that of the blue compact galaxy Haro 11 in Bergvall et al. (2006) where fesc between 4–10% was found, will have a feedback on cosmic reionization models.

scholarly journals Far-Ultraviolet Observations of Outflows from Infrared-Luminous Galaxies

2012 ◽  
Vol 8 (S292) ◽  
pp. 367-370
Author(s):  
Claus Leitherer ◽  
Rupali Chandar ◽  
Christy A. Tremonti ◽  
Aida Wofford
Keyword(s):  
Star Formation ◽  
Starburst Galaxies ◽  
Metal Enrichment ◽  
Ultraviolet Spectra ◽  
Luminous Galaxies ◽  
Mass Outflow ◽  
Far Ultraviolet ◽  
Ultraviolet Observations

AbstractWe have obtained ultraviolet spectra between 1150 and 1450 Å of four ultraviolet-bright, infrared-luminous starburst galaxies. Our selected sight-lines towards the starburst nuclei probe the conditions in the starburst-driven outflows. We detect outflowing gas with velocities of up to ∼900 km s−1. It is likely that the outflows are a major source of metal enrichment of the galaxies' halos. The mass outflow rates of several tens of M⊙ yr−1 are similar to the star-formation rates. The outflows may quench star formation and ultimately regulate the starburst.

Far‐Ultraviolet Spectra of Starburst Galaxies: Stellar Population and the Kinematics of the Interstellar Medium

1998 ◽  
Vol 495 (2) ◽  
pp. 698-717 ◽  
Author(s):  
Rosa M. González Delgado ◽  
Claus Leitherer ◽  
Timothy Heckman ◽  
James D. Lowenthal ◽  
Henry C. Ferguson ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Stellar Population ◽  
Starburst Galaxies ◽  
Ultraviolet Spectra ◽  
Far Ultraviolet

scholarly journals Far-Ultraviolet Observations of Supernova Remnants

1996 ◽  
Vol 145 ◽  
pp. 391-397
Author(s):  
William P. Blair
Keyword(s):  
Interstellar Medium ◽  
Supernova Remnants ◽  
Blast Waves ◽  
Far Ultraviolet ◽  
Ultraviolet Observations ◽  
The Way

New observations of supernova remnants in the far ultraviolet, especially in the sub-Ly α region, are changing the way we look at the interaction between blast waves and the interstellar medium. I briefly review some of the recent FUV observations of supernova remnants from the Hopkins Ultraviolet Telescope, the Voyager Ultraviolet Spectrometers, as well as IUE and HST.

scholarly journals On the Mechanism of H2 Formation in the Interstellar Medium

1987 ◽  
Vol 120 ◽  
pp. 167-169
Author(s):  
Valerio Pirronello
Keyword(s):  
Interstellar Medium ◽  
Molecular Hydrogen ◽  
Formation Rate ◽  
Cosmic Ray ◽  
Interstellar Clouds ◽  
H2 Formation ◽  
Reduced Mobility

The problem of the formation of molecular hydrogen in interstellar clouds is revisited. the role played by cosmic ray bombardment under certain circumstances is considered mainly in the light of the low formation rate of H2 on grains due to the reduced mobility of adsorbed H atoms on their amorphous surfaces at interstellar temperatures.

scholarly journals Ultraviolet Observations of Some Close Binary Systems by the Astronomical Netherlands Satellite-Ans

1976 ◽  
Vol 73 ◽  
pp. 213-223
Author(s):  
Chi-Chao Wu
Keyword(s):  
Binary Systems ◽  
Hot Spot ◽  
Close Binary ◽  
Spectral Energy ◽  
Dwarf Novae ◽  
Energy Distributions ◽  
Primary Star ◽  
Higher Temperature ◽  
Far Ultraviolet ◽  
Ultraviolet Observations

Observations of δ Pic, a β Lyr type of eclipsing binary and seven dwarf novae are reported. The ultraviolet light curves of δ Pic indicate the accumulation of matter at the triangular Lagrangian points L4 and L5, the presence of a hot spot and a higher temperature for the primary star. The implication is that the cooler secondary fills its Roche lobe and is transfering mass to the primary; mass loss to the circumstellar space and possibly to the system may also be appreciable. The temperatures of dwarf novae are derived by comparing their ultraviolet spectral energy distributions with those for normal stars of luminosity classes IV and V. Piecing together observations for different objects, the SSCyg systems have temperatures of 28 500 K, 10 000 K and 9500 K, respectively, when they are at minimum, immediately before outburst and at the beginning of rise to maximum. At maximum, the temperature is 22 500 K or 17 300 K depending on the interstellar reddening correction for AR And. Immediately before outburst, there is a large excess of flux in the far ultraviolet as indicated by the large value of the ratio of flux at 1550 Å to that at 1800 Å. The observations of Z Cam during standstill gives a temperature of 14 900 K. No excess of flux in the far ultraviolet was observed during the maximum of AR And and the standstill of Z Cam.

scholarly journals Discovery of an Extremely Short Duration Flare from Proxima Centauri Using Millimeter through Far-ultraviolet Observations

2021 ◽  
Vol 911 (2) ◽  
pp. L25
Author(s):  
Meredith A. MacGregor ◽  
Alycia J. Weinberger ◽  
R. O. Parke Loyd ◽  
Evgenya Shkolnik ◽  
Thomas Barclay ◽  
...  
Keyword(s):  
Short Duration ◽  
Far Ultraviolet ◽  
Ultraviolet Observations

The Interstellar Medium in the Far Ultraviolet

2009 ◽  
Author(s):  
J. Christopher Howk ◽  
Michael E. Van Steenberg ◽  
George Sonneborn ◽  
H. Warren Moos ◽  
William P. Blair
Keyword(s):  
Interstellar Medium ◽  
Far Ultraviolet

Extreme and Far Ultraviolet Observations from EURD after Three Years of Mission

2001 ◽  
pp. 345-348 ◽  
Author(s):  
C. Morales ◽  
J. F. Gómez ◽  
J. Trapero ◽  
V. Orozco ◽  
S. Bowyer ◽  
...  
Keyword(s):  
Far Ultraviolet ◽  
Ultraviolet Observations
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