IRAS observations of normal galaxies: The UGC redshift sample

2008 ◽  
pp. 210-212
Author(s):  
C. J. Lonsdale ◽  
W. L. Rice ◽  
G. D. Bothun
Keyword(s):  
Normal Galaxies

scholarly journals Connecting the Interstellar Gas and Dust Properties in Distant Galaxies Using Quasar Absorption Systems

2015 ◽  
Vol 11 (S315) ◽  
Author(s):  
Monique C. Aller ◽  
Varsha P. Kulkarni ◽  
Donald G. York ◽  
Daniel E. Welty ◽  
Giovanni Vladilo ◽  
...  
Keyword(s):  
Star Formation ◽  
Galaxy Evolution ◽  
Absorption Feature ◽  
Dust Grains ◽  
Interstellar Gas ◽  
Chemical Enrichment ◽  
Normal Galaxies ◽  
History Of ◽  
Dust Grain ◽  
Grain Properties

AbstractGas and dust grains are fundamental components of the interstellar medium and significantly impact many of the physical processes driving galaxy evolution, such as star-formation, and the heating, cooling, and ionization of the interstellar material. Quasar absorption systems (QASs), which trace intervening galaxies along the sightlines to luminous quasars, provide a valuable tool to directly study the properties of the interstellar gas and dust in distant, normal galaxies. We have established the presence of silicate dust grains in at least some gas-rich QASs, and find that they exist at higher optical depths than expected for diffuse gas in the Milky Way. Differences in the absorption feature shapes additionally suggest variations in the silicate dust grain properties, such as in the level of grain crystallinity, from system-to-system. We present results from a study of the gas and dust properties of QASs with adequate archival IR data to probe the silicate dust grain properties. We discuss our measurements of the strengths of the 10 and 18 μm silicate dust absorption features in the QASs, and constraints on the grain properties (e.g., composition, shape, crystallinity) based on fitted silicate profile templates. We investigate correlations between silicate dust abundance, reddening, and gas metallicity, which will yield valuable insights into the history of star formation and chemical enrichment in galaxies.

STAR FORMATION IN THE CENTRAL REGIONS OF ACTIVE AND NORMAL GALAXIES

2015 ◽  
Vol 150 (2) ◽  
pp. 43 ◽  
Author(s):  
Mengchun Tsai ◽  
Chorng-Yuan Hwang
Keyword(s):  
Star Formation ◽  
Normal Galaxies ◽  
Central Regions

scholarly journals Stellar populations of local infrared-selected galaxies

2009 ◽  
Vol 5 (S262) ◽  
pp. 313-314
Author(s):  
X. Y. Chen ◽  
Y. C. Liang ◽  
F. Hammer ◽  
Y. H. Zhao ◽  
G. H. Zhong
Keyword(s):  
Stellar Populations ◽  
Infrared Galaxies ◽  
Star Forming ◽  
Luminous Infrared Galaxies ◽  
Normal Galaxies

AbstractThe stellar populations of 849 local infrared-selected galaxies from SDSS and IRAS (including 419 star-forming galaxies, 326 composite galaxies, 35 Seyfert 2s, and 69 LINERs in 4 spectral classes) are studied by using STARLIGHT. Among the 4 spectral classes, the importance of young populations decreases from star-forming, composite, Seyfert 2 to LINER; and Seyfert 2 and LINER are more metal-rich; ULIGs (ultra luminous infrared galaxies) & LIGs present the youngest populations among 3 infrared luminosity bins; and normal galaxies are more metal-rich. The dominant contributors to masses are all old populations.

The X-ray properties of normal galaxies

1986 ◽  
Vol 98 ◽  
pp. 525 ◽  
Author(s):  
G. Fabbiano
Keyword(s):  
X Ray ◽  
Normal Galaxies

scholarly journals POPULATION SYNTHESIS MODELS FOR NORMAL GALAXIES WITH DUSTY DISKS

2003 ◽  
Vol 20 (3) ◽  
pp. 175-184
Author(s):  
Kyung-Won Suh ◽  
Mi-Ryang Kim
Keyword(s):  
Population Synthesis ◽  
Normal Galaxies ◽  
Dusty Disks

scholarly journals SDSS J114818.18-013823.7: Forming Compact Dwarf Galaxy through the Dwarf-Dwarf Merger

2021 ◽  
Vol 7 (2) ◽  
pp. 49-57
Author(s):  
D. N. Chhatkuli ◽  
S. Paudel ◽  
A. K. Gautam ◽  
B. Aryal
Keyword(s):  
Star Formation ◽  
Emission Line ◽  
Star Formation Rate ◽  
Dwarf Galaxy ◽  
Formation Rate ◽  
Absolute Magnitude ◽  
Spectroscopic Properties ◽  
Normal Galaxies ◽  
Star Formation Activity ◽  
The Galaxy

We studied the spectroscopic properties of the low redshift (z = 0.0130) interacting dwarf galaxy SDSS J114818.18-013823.7. It is a compact galaxy of half-light radius 521 parsec. It’s r-band absolute magnitude is -16.71 mag. Using a publicly available optical spectrum from the Sloan Sky Survey data archive, we calculated star-formation rate, emission line metallicity, and dust extinction of the galaxy. Star formation rate (SFR) due to Hα is found to be 0.118 Mʘ year-1 after extinction correction. The emission-line metallicity, 12+log(O/H), is 8.13 dex. Placing these values in the scaling relation of normal galaxies, we find that SDSS J114818.18-013823.7 is a significant outlier from both size-magnitude relation and SFR-B-band absolute relation. Although SDSS J114818.18-013823.7 possess enhance rate of star-formation, the current star-formation activity can persist several Giga years in the future at the current place and it remains compact.

X-Ray Emission from Normal Galaxies

1981 ◽  
pp. 153-172 ◽  
Author(s):  
L. Van Speybroeck ◽  
J. Bechtold
Keyword(s):  
X Ray ◽  
Normal Galaxies
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