Results 71 to 80 of about 12,408 (264)
Stellar Abundances in Dwarf Irregular Galaxies
, 2003 Dwarf irregular galaxies appear to have undergone very slow chemical evolution since they have low nebular abundances, but have had ongoing star formation over the past 15 Gyr. They are too distant for red giant abundance analyses to examine the details of their chemical evolution, however the isolated, bright blue supergiants do allow us to determine ...
Venn, K.A. +3 more
openaire +3 more sources
Variable star monitoring in local group dwarf irregular galaxies [PDF]
International Astronomical Union Colloquium, 2004 AbstractDwarf galaxies in the local group provide a unique astrophysical laboratory. Despite their proximity some of these systems still lack reliable distance determinations as well as studies of their stellar content and star formation history. We present first results of our survey of variable stars in a sample of six local group dwarf irregular ...
Snigula, Jan +3 more
openaire +2 more sources
Neutral Gas Distributions and Kinematics of Five Blue Compact Dwarf Galaxies [PDF]
, 1998 We present the results of high spatial resolution HI observations of five intrinsically compact dwarf galaxies which are currently experiencing a strong burst of star formation.
Salzer, J. J. +2 more
core +2 more sources
The Astrophysical Journal, 2023 Mrk 71 is a low-metallicity ( Z = 0.16 Z _☉ ) starburst region in the local dwarf galaxy NGC 2366, hosting two super star clusters (SSCs A and B), and it is recognized as a Green Pea (GP) analog with SSC A responsible for the GP properties.
Linda J. Smith +12 more
doaj +1 more source
The HI column density distribution function in faint dwarf galaxies
, 2012 We present the HI column density distribution function,\fnh, as measured from dwarf galaxies observed as part of the Faint Irregular Galaxy GMRT (FIGGS) survey.
Begum, Ayesha +2 more
core +1 more source
A Luminous X-Ray Active Galactic Nucleus in the Dwarf–Dwarf Galaxy Merger RGG 66
The Astrophysical JournalWe present the discovery of a luminous X-ray active galactic nucleus (AGN) in the dwarf galaxy merger RGG 66. The black hole is predicted to have a mass of M _BH ∼ 10 ^5.4 M _⊙ and to be radiating close to its Eddington limit ( L _bol / L _Edd ∼ 0.75 ...
Seth J. Kimbrell, Amy E. Reines
doaj +1 more source
Pavo: Discovery of a Star-forming Dwarf Galaxy Just Outside the Local Group
The Astrophysical Journal Letters, 2023 We report the discovery of Pavo, a faint ( M _V = −10.0), star-forming, irregular, and extremely isolated dwarf galaxy at D ≈ 2 Mpc. Pavo was identified in Dark Energy Camera Legacy Survey imaging via a novel approach that combines low surface brightness
Michael G. Jones +11 more
doaj +1 more source
Chemical evolution of dwarf irregular and blue compact galaxies [PDF]
Astronomy & Astrophysics, 2011 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 (bursting and continuous) and different kinds of galactic winds (normal and metal-enhanced).
Yin, J. +2 more
openaire +3 more sources
SAO-6m Telescope Spectroscopic Observations of Globular Clusters in Nearby Galaxies [PDF]
, 2010 We present the results of medium-resolution spectroscopy of 28 globular clusters (GCs) in six nearby galaxies of different luminosities and morphological types, situated in: M33 (15 objects), M31 (3), IC10 (4), UGCA86 (4), HolmbergIX (1), and DDO71 (1 ...
Chandar, Rupali +4 more
core +1 more source
Deep Hubble Space Telescope Imaging of IC 1613 II. The Star Formation History
, 2003 We present deep HST WFPC2 imaging of the Local Group dwarf irregular galaxy IC 1613. The photometry is the deepest to date for an isolated dwarf irregular galaxy.
Abhijit Saha +31 more
core +4 more sources