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Related papers: Evolution of dwarf galaxies: a dynamical perspecti…

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We present oxygen abundance measurements for 74 blue compact dwarf (BCD) galaxies in the redshift range in [0.2, 0.5] using the strong-line method. The spectra of these objects are taken using Hectospec on the Multiple Mirror Telescope…

Astrophysics of Galaxies · Physics 2016-03-16 Jianhui Lian , Ning Hu , Guanwen Fang , Chengyun Ye , Xu Kong

For almost two decades the properties of "dwarf" galaxies have challenged the Cold Dark Matter (CDM) paradigm of galaxy formation. Most observed dwarf galaxies consists of a rotating stellar disc embedded in a massive DM halo with a near…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Fabio Governato , Chris Brook , Lucio Mayer , Alyson Brooks , George Rhee , James Wadsley , Patrik Jonsson , Beth Willman , Greg Stinson , Thomas Quinn , Piero Madau

Dwarf irregular and blue compact galaxies are very interesting objects since they are relatively simple and unevolved. We present new models for the chemical evolution of these galaxies by assuming different regimes of star formation…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Jun Yin , Francesca Matteucci , Giovanni Vladilo

We present a study of a large, statistically complete sample of star-forming dwarf galaxies using mid-infrared observations from the {\it Spitzer Space Telescope}. The relationships between metallicity, star formation rate (SFR) and…

Astrophysics of Galaxies · Physics 2010-07-01 Sukbum A. Hong , Jessica L. Rosenberg , Matthew L. N. Ashby , John J. Salzer

The results of an Halpha photometric survey of 30 dwarf galaxies of various morphologies in the Centaurus A and Sculptor groups are presented. Of these 30, emission was detected in 13: eight are of late-type, two are early-type and three…

Astrophysics · Physics 2009-11-13 A. Bouchard , G. S. Da Costa , H. Jerjen

The stellar, gaseous and young stellar disks in the LITTLE THINGS sample of nearby dIrrs are fitted with functions to search for correlations between the parameters. We find that the HI radial profiles are generally flatter in the center…

We describe results of a multi-spectral study of a blue compact dwarf galaxy in Virgo. The object was observed with broad-band and H$\alpha$ imaging, UV observations, and radio synthesis. Our data were combined with published optical…

Astrophysics · Physics 2007-05-23 N. Brosch , E. Almoznino , L. Hoffman

We present uniformly measured star formation histories (SFHs) of 60 nearby (D~4Mpc) dwarf galaxies based on CMDs of resolved stellar populations from images taken with HST as part of the ACS Nearby Galaxy Survey Treasury program (ANGST).…

At redshifts around 0.1 the CFHT Legacy Survey Deep fields contain some 6x10^4 galaxies spanning the mass range from 10^5 to 10^12 Msun. We measure the stellar mass dependence of the two point correlation using angular measurements to…

Astrophysics · Physics 2014-11-18 R. G. Carlberg , M. Sullivan , D. Le Borgne

We identify and characterize compact dwarf starburst (CDS) galaxies in the RESOLVE survey, a volume-limited census of galaxies in the local universe, to probe whether this population contains any residual ``blue nuggets,'' a class of…

We examine whether the radial acceleration relation (RAR) of dwarf galaxies can be explained by Verlinde's emergent gravity. This is the extension of arXiv:2206.11685v3, which examines the RAR of typical spiral galaxies, to less massive…

General Relativity and Quantum Cosmology · Physics 2024-12-24 Sanghyeon Han , Ho Seong Hwang , Youngsub Yoon

Stellar feedback in dwarf galaxies plays a critical role in regulating star formation via galaxy-scale winds. Recent hydrodynamical zoom simulations of dwarf galaxies predict that the periodic outward flow of gas can change the…

Keck/ESI spectroscopy is presented for six Virgo Cluster dwarf elliptical (dE) galaxies. The mean line-of-sight velocity and velocity dispersion are resolved as a function of radius along the major axis of each galaxy, nearly doubling the…

Astrophysics · Physics 2009-11-07 M. Geha , P. Guhathakurta , R. van der Marel

We present an analysis of the neutral hydrogen (HI) properties of a fully cosmological hydrodynamical dwarf galaxy, run with varying simulation parameters. As reported by Governato et al. (2010), the high resolution, high star formation…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 K. Pilkington , B. K. Gibson , F. Calura , A. M. Brooks , L. Mayer , C. B. Brook , G. S. Stinson , R. J. Thacker , C. G. Few , D. Cunnama , J. Wadsley

Early-type dwarfs are the most common galaxy in the local universe, yet their origin and evolution remain a mystery. Various cosmological scenarios predict that dwarf-like galaxies in dense areas are the first to form and hence should be…

Astrophysics · Physics 2015-06-24 Christopher J. Conselice , John S. Gallagher , Rosemary F. G. Wyse

The Virgo cluster is one of the closest clusters to us where we can further study the evolution of galaxies, with several infalling substructures and several filaments around it have been reported. Therefore, it makes this cluster and its…

Astrophysics of Galaxies · Physics 2026-03-30 Nelvy Choque-Challapa , Rory Smith , Iván Lacerna , J. Alfonso L. Aguerri , Daniela Palma

The formation and evolution of dwarf galaxies is relatively difficult to understand because of their faint emission in all regimes that require large aperture telescopes. We intend to study the evolution of star forming dwarf galaxies in…

Cosmology and Nongalactic Astrophysics · Physics 2011-08-31 O. Vaduvescu , C. Kehrig , J. M. Vilchez , E. Unda-Sanzana

We discuss how knowledge of the whole evolutionary history of dwarf galaxies, including details on the early star formation events, can provide insight on the origin of the different dwarf galaxy types. We suggest that these types may be…

We confirm and extend the recent finding that the central surface density r_0*rho_0 galaxy dark matter halos, where r_0 and rho_0 are the halo core radius and central density, is nearly constant and independent of galaxy luminosity. Based…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 F. Donato , G. Gentile , P. Salucci , C. Frigerio Martins , M. I. Wilkinson , G. Gilmore , E. K. Grebel , A. Koch , R. Wyse

We examine the dust-to-gas ratio as a function of metallicity for dwarf galaxies [dwarf irregular galaxies (dIrrs) and blue compact dwarf galaxies (BCDGs)]. Using a one-zone model and adopting the instantaneous recycling approximation, we…

Astrophysics · Physics 2009-10-31 H. Hirashita