scholarly journals The star formation histories of red and blue low surface brightness disk galaxies

2010 ◽  
Vol 520 ◽  
pp. A69 ◽  
Author(s):  
G. H. Zhong ◽  
Y. C. Liang ◽  
F. Hammer ◽  
X. Y. Chen ◽  
L. C. Deng ◽  
...  
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Disk Galaxies ◽  
Low Surface Brightness ◽  
Star Formation Histories

scholarly journals The star formation histories of Low Surface Brightness galaxies

1999 ◽  
Vol 171 ◽  
pp. 245-252
Author(s):  
E.F. Bell ◽  
R.G. Bower ◽  
R.S. de Jong ◽  
B.J. Rauscher ◽  
D. Barnaby ◽  
...  
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Near Infrared ◽  
Large Range ◽  
Optical Data ◽  
Disk Galaxies ◽  
Infrared Images ◽  
Low Surface Brightness ◽  
Star Formation Histories ◽  
Low Surface Brightness Galaxies

AbstractNear-infrared images of a sample of red, blue and giant low surface brightness disk galaxies (LSBGs) were combined with optical data with the aim of constraining their star formation histories. Most LSBGs have strong colour gradients consistent with mean stellar age gradients. We find that LSBGs have a large range of ages and metallicities, spanning those observed in normal disk galaxies. In particular, red and blue LSBGs have very different star formation histories and represent two independent routes to low B band surface brightness. Blue LSBGs are well described by models with low, roughly constant star formation rates, whereas red LSBGs are better described by a ‘faded disk’ scenario.

scholarly journals A recent starbust in the low surface brightness galaxy UGC 628

2020 ◽  
Vol 493 (1) ◽  
pp. 55-69 ◽  
Author(s):  
J E Young ◽  
Rachel Kuzio de Naray ◽  
Sharon X Wang
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
High Surface ◽  
Star Formation History ◽  
Starburst Galaxy ◽  
Time Step ◽  
Low Surface Brightness ◽  
History Of ◽  
Star Formation Histories ◽  
Lsb Galaxies

ABSTRACT We present the star-formation history of the low surface brightness (LSB) galaxy UGC 628 as part of the MUSCEL program (MUltiwavelength observations of the Structure, Chemistry, and Evolution of LSB galaxies). The star-formation histories of LSB galaxies represent a significant gap in our knowledge of galaxy assembly, with implications for dark matter / baryon feedback, IGM gas accretion, and the physics of star formation in low metallicity environments. Our program uses ground-based IFU spectra in tandem with space-based UV and IR imaging to determine the star-formation histories of LSB galaxies in a spatially resolved fashion. In this work we present the fitted history of our first target to demonstrate our techniques and methodology. Our technique splits the history of this galaxy into 15 semilogarithmically spaced time-steps. Within each time-step the star-formation rate of each spaxel is assumed constant. We then determine the set of 15 star-formation rates that best recreate the spectra and photometry measured in each spaxel. Our main findings with respect to UGC 628 are: (i) the visible properties of UGC 628 have varied over time, appearing as a high surface brightness spiral earlier than 8 Gyr ago and a starburst galaxy during a recent episode of star formation several tens of Myr ago, (ii) the central bar/core region was established early, around 8–10 Gyr ago, but has been largely inactive since, and (iii) star formation in the past 3 Gyr is best characterized as patchy and sporadic.

scholarly journals The star formation histories of low surface brightness galaxies

2000 ◽  
Vol 312 (3) ◽  
pp. 470-496 ◽  
Author(s):  
E. F. Bell ◽  
D. Barnaby ◽  
R. G. Bower ◽  
R. S. de Jong ◽  
D. A. Harper ◽  
...  
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Low Surface Brightness ◽  
Star Formation Histories ◽  
Low Surface Brightness Galaxies

scholarly journals Stellar Populations and the Star Formation Histories of LSB Galaxies: IV Spitzer Surface Photometry of LSB Galaxies

2014 ◽  
Vol 31 ◽  
Author(s):  
James M. Schombert ◽  
Stacy McGaugh
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Surface Photometry ◽  
Low Surface Brightness ◽  
The Mean ◽  
Star Formation Histories ◽  
Lsb Galaxies ◽  
Single Exponential

AbstractSurface photometry at 3.6 μm is presented for 61 low surface brightness (LSB) galaxies (μo<19 3.6 μm mag arcsecs−2). The sample covers a range of luminosity from −11 to −22 in M3.6 and size from 1 to 25 kpc. The morphologies in the mid-IR are comparable to those in the optical with 3.6 μm imaging reaches similar surface brightness depth as ground-based optical imaging. A majority of the resulting surface brightness profiles are single exponential in shape with very few displaying upward or downward breaks. The mean V − 3.6 colour of LSB is 2.3 with a standard deviation of 0.5. Colour-magnitude and two-colour diagrams are well matched to models of constant star formation, where the spread in colour is due to small changes in the star formation rate (SFR) over the last 0.5 Gyrs as also suggested by the specific SFR measured by Hα.

Diffuse post-starburst galaxies: a smoking gun of formation of ultra-diffuse galaxies via ram pressure stripping

2018 ◽  
Vol 14 (S344) ◽  
pp. 365-368
Author(s):  
Igor V. Chilingarian ◽  
Kirill A. Grishin ◽  
Anton V. Afanasiev ◽  
Daniel Fabricant ◽  
Ivan Yu. Katkov
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Stellar Population ◽  
Starburst Galaxies ◽  
Disk Galaxies ◽  
Dynamical Mass ◽  
Low Surface Brightness ◽  
Ram Pressure ◽  
Stellar Velocity ◽  
Stellar Masses

AbstractUltra-diffuse galaxies (UDGs) have sizes comparable to the Milky Way and stellar masses of about 1/1000 of it. They attracted a lot of attention as possible “dark galaxies” heavily dominated by dark matter, however, no reliable dynamical mass estimates were done because of their extremely low surface brightness. We have recently found 13 gas free diffuse young (300–500 Myr) post-starburst galaxies (PSGs) without ongoing star formation in Coma and Abell 2147, which, should they continue to evolve passively, will become UDGs in 5 Gyr. We obtained deep spectroscopic observations for 11 diffuse PSGs and derived their internal kinematics and stellar population properties. All of them possess disk-like kinematics (substantial rotation, low stellar velocity dispersion) and likely experienced starburst episodes prior to the star formation quenching by ram pressure stripping. Our results suggest that at least some UDGs were “normal” intermediate to large-sized disk galaxies in the past, which were later quenched by dense environment.

scholarly journals What We Don’t Know About the Universe

1999 ◽  
Vol 171 ◽  
pp. 393-400
Author(s):  
Chris Impey
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Surface Brightness ◽  
Large Scale ◽  
Big Bang ◽  
Low Surface Brightness ◽  
Big Bang Model ◽  
Star Formation Histories ◽  
The Universe ◽  
True Population

AbstractDespite progress on many fronts in cosmology, outstanding questions remain. What is the nature of the dark matter? Is the inflationary big bang model viable? Must we accept a non-zero cosmological constant? Do we know the true population of galaxies? What is the range of star formation histories in the universe? Can gravity alone explain the large scale structure we observe? Studies of the low surface brightness universe may provide the answers to many of these questions.

scholarly journals Gas-rich LSB Galaxies – Progenitors of Blue Compact Dwarfs?

1999 ◽  
Vol 171 ◽  
pp. 253-260 ◽  
Author(s):  
John J. Salzer ◽  
Stuart A. Norton
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
Dwarf Galaxies ◽  
Dwarf Galaxy ◽  
Mass Density ◽  
Central Mass ◽  
Galaxy Distribution ◽  
Low Surface Brightness ◽  
Central Regions ◽  
Lsb Galaxies

AbstractWe analyze deep CCD images of nearby Blue Compact Dwarf (BCD) galaxies in an attempt to understand the nature of the progenitors which are hosting the current burst of star formation. In particular, we ask whether BCDs are hosted by normal or low-surface-brightness dI galaxies. We conclude that BCDs are in fact hosted by gas-rich galaxies which populate the extreme high-central-mass-density end of the dwarf galaxy distribution. Such galaxies are predisposed to having numerous strong bursts of star formation in their central regions. In this picture, BCDs can only occur in the minority of dwarf galaxies, rather than being a common phase experienced by all gas-rich dwarfs.

scholarly journals Star Formation Thresholds in Low Surface Brightness Dwarf Galaxies

1999 ◽  
Vol 171 ◽  
pp. 274-281
Author(s):  
Liese van Zee
Keyword(s):  
Star Formation ◽  
Comparative Study ◽  
Column Density ◽  
Surface Brightness ◽  
Dwarf Galaxies ◽  
Critical Threshold ◽  
Active Star ◽  
Comparison Sample ◽  
Active Star Formation ◽  
Low Surface Brightness

AbstractThe results of a comparative study of star formation thresholds in gas-rich, low surface brightness, dwarf galaxies are presented. Approximately half the galaxies in the study were “high MH/LB” galaxies, which appear to have inefficient star formation properties. The comparison sample comprised of otherwise “normal” dwarf galaxies, with moderate current star formation rates. In all systems, sites of active star formation were associated with local peaks in the HI column density. For both types of galaxies, the azimuthally averaged gas column density is low. Similar to other LSB systems, the global gas densities are well below the critical threshold for star formation throughout the system. Thus, star formation is inhibited globally, but occurs locally in these gas-rich dwarf galaxies.

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