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Data are presently available on the luminosities and half-light radii of 101 globular clusters associated with low-luminosity parent galaxies. The luminosity distribution of globulars embedded in dwarf galaxies having $M_{v} > -16$ is found…

Astrophysics · Physics 2009-11-11 Sidney van den Bergh

At which masses does the regime of globular clusters end and the one of dwarf galaxies begin? And what separates these two classes of hot stellar systems? We examine to what extend very massive (>10^7 Mo) young star clusters are similar to…

Astrophysics · Physics 2009-11-11 Markus Kissler-Patig , Andres Jordan , Nate Bastian

We use a complete, unbiased sample of 257 dwarf (10^8 MSun < Mstar < 10^9.5 MSun) galaxies at z < 0.08, in the COSMOS field, to study the morphological mix of the dwarf population in low-density environments. Visual inspection of extremely…

Astrophysics of Galaxies · Physics 2024-03-04 Ilin Lazar , Sugata Kaviraj , Aaron E. Watkins , Garreth Martin , Brian Bichang'a , Ryan A. Jackson

Low mass galaxies in the Local Group are dominated by dark matter and comprise the well studied ``dwarf Spheroidal" (dSph) class, with typical masses of $10^{9-10}M_\odot$ and also the equally numerous ``ultra faint dwarfs" (UFD),…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-20 Alvaro Pozo , Tom Broadhurst , George F. Smoot , Tzihong Chiueh , Hoang Nhan Luu , Mark Vogelsberger , Philip Mocz

We study dwarf galaxies in the Centaurus A group to investigate their metallicity and possible environmental effects. The Centaurus A group (at ~4 Mpc from the Milky Way) contains about 50 known dwarf companions of different morphologies…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 D. Crnojević , E. K. Grebel , A. Koch

Recent observations suggest that dwarf galaxies pervade the universe, for they have been encountered in large numbers in all the environments. However, we present evidence that suggests dwarf galaxies may be subject to strong dynamical…

Astrophysics · Physics 2007-05-23 Omar Lopez-Cruz , H. K. C. Yee

We report the discovery of a rare isolated group of five dwarf galaxies located at z = 0.0086 ($D$ = 36 Mpc). All member galaxies are star-forming, blue, and gas-rich with $g-r$ indices ranging from 0.2 to 0.6 mag, and two of them show…

Astrophysics of Galaxies · Physics 2024-11-18 Sanjaya Paudel , Cristiano G. Sabiu , Suk-Jin Yoon , Pierre-Alain Duc , Jaewon Yoo , Oliver Müller

We report the discovery of a new dwarf galaxy (NGC6503-d1) during the Subaru extended ultraviolet (XUV) disk survey. It is a likely companion of the spiral galaxy NGC6503. The resolved images, in B, V, R, i, and Halpha, show an irregular…

We present a photometric study of the early-type dwarf galaxy population of the Centaurus cluster, aiming at investigating the galaxy luminosity function (LF) and galaxy scaling relations down to the regime of galaxies with M_V~-10 mag. On…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 I. Misgeld , M. Hilker , S. Mieske

We study a sample of 5 dwarf irregular galaxies in the CenA/M83 group, which are companions to the giant elliptical CenA. We aim at deriving their physical properties over their lifetime and compare them to those of dwarfs located in…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 D. Crnojević , E. K. Grebel , A. A. Cole

We present the results of a photometric and spectroscopic study of the white dwarf candidate members of the intermediate age open clusters NGC3532 and NGC2287. Of the nine objects investigated, it is determined that six are probable members…

Solar and Stellar Astrophysics · Physics 2009-11-13 P. D. Dobbie , R. Napiwotzki , M. R. Burleigh , K. Williams , R. G. Sharp , M. A. Barstow , S. L. Casewell , I. Hubeny

With this third paper of a series we present Johnson-Gunn B,g,V,r,i,z multicolour photometry for 79 objects, including a significant fraction of the faintest galaxies around NGC5044, assessing group membership on the basis of apparent…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 A. Buzzoni , S. A. Cellone , P. Saracco , E. Zucca

Using photometric redshifts we determine the galaxy population of the clusters of galaxies Cl0016+16 at z=0.55, Cl1600+41 at z=0.54, Cl1601+42 at z=0.54 and MS1008-1224 at z=0.31. Comparing the clusters, we find no evidence for a universal…

Astrophysics · Physics 2009-11-10 Tomas Dahlen , Claes Fransson , Magnus Naslund , Goran Ostlin

The study of dwarf galaxies in groups is a powerful tool for investigating galaxy evolution, chemical enrichment and environmental effects on these objects. Here we present results obtained for dwarf galaxies in the Centaurus A complex, a…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 D. Crnojević , E. K. Grebel , A. A. Cole , A. Koch , M. Rejkuba , G. Da Costa , H. Jerjen

We use the clustering results obtained by Madgwick et al. (2003) for a sample of 96,791 2dF galaxies with redshift 0.01 \lt z \lt 0.15 to study the distribution of late-type and early-type galaxies within dark matter haloes of different…

Astrophysics · Physics 2009-11-07 M. Magliocchetti , C. Porciani

We present the results of a Hubble Space Telescope (HST) ACS and WFPC2 study of dwarf galaxies in the nearby Perseus Cluster, down to M_V = -12, spanning the core and outer regions of this cluster. We examine how properties such as the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Samantha J. Penny , Christopher J. Conselice

For a rotating galaxy, the inner circular-velocity gradient d_{R}V(0) provides a direct estimate of the central dynamical mass density, including gas, stars, and dark matter. We consider 60 low-mass galaxies with high-quality HI and/or…

Astrophysics of Galaxies · Physics 2014-03-05 Federico Lelli , Filippo Fraternali , Marc Verheijen

We analyse the mass density distribution in the centres of galaxies across five orders of magnitude in mass range. Using high-quality spiral galaxy rotation curves and infrared photometry from SPARC, we conduct a systematic study of their…

Astrophysics of Galaxies · Physics 2019-09-04 C. Tortora , L. Posti , L. V. E. Koopmans , N. R. Napolitano

Dwarf galaxies constitute 18\% of the galaxies in the core of the Coma Cluster. We present the correlation between structural properties and morphology of galaxies in the central region of Coma Cluster for 221 objects within the apparent…

Astrophysics of Galaxies · Physics 2020-01-08 S N Hasan , Priya Shah , P Nagamani

After summarizing the characteristics of different types of dwarf galaxies I briefly review our current state of knowledge of dwarf galaxy evolution in the Local Group, for which we now have a fairly detailed although by no means…

Astrophysics · Physics 2007-05-23 Eva K. Grebel