Results 41 to 50 of about 11,803 (197)

A Comprehensive Archival Search for Counterparts to Ultra-Compact High Velocity Clouds: Five Local Volume Dwarf Galaxies [PDF]

open access: yes, 2015
We report five Local Volume dwarf galaxies (two of which are presented here for the first time) uncovered during a comprehensive archival search for optical counterparts to ultra-compact high velocity clouds (UCHVCs).
Bennet, P.   +19 more
core   +3 more sources

Star formation in dwarf irregular galaxies NGC 6822

open access: yesThe Astronomical Journal, 1995
Our proposed method to study the star formation histories in nearby irregulars is here applied to NGC 6822. To this purpose we have obtained accurate CCD photometry of three regions in the galaxy, reaching V$\simeq$23.5 with an accuracy of $ _{BVR}\leq$0.1 mag.
Marconi, G.   +3 more
openaire   +2 more sources

The fundamental plane of dwarf irregular galaxies [PDF]

open access: yesAstronomy & Astrophysics, 2008
Aims. Near-IR photometry of dwarf irregular galaxies (dIs) has been acquired to expand the sample of objects suitable for investigating the fundamental plane (FP) discovered previously by us. Data for blue compact dwarfs (BCDs), dwarf ellipticals (dEs), and dwarf spheroidal galaxies (dSphs) are amalgamated to evaluate how closely these classes of ...
O. Vaduvescu, M. L. McCall
openaire   +1 more source

Evidence for Mass-dependent Evolution of Transitional Dwarf Galaxies in the Virgo Cluster

open access: yesThe Astrophysical Journal
The presence of transitional dwarf galaxies in cluster environments supports the hypothesis that infalling star-forming galaxies are transformed into quiescent early-type dwarf galaxies (ETdGs) through environmental effects.
Suk Kim, Soo-Chang Rey, Youngdae Lee
doaj   +1 more source

Stellar Populations and the Star Formation Histories of LSB Galaxies—Part I: Optical and Hα Imaging

open access: yesAdvances in Astronomy, 2011
This paper presents optical and Hα imaging for a large sample of LSB galaxies selected from the PSS-II catalogs (Schombert et al., 1992).
James Schombert   +2 more
doaj   +1 more source

Catching Tidal Dwarf Galaxies at a Later Evolutionary Stage with ALFALFA

open access: yesThe Astronomical Journal, 2023
We present deep optical imaging and photometry of four objects classified as “Almost-Dark” galaxies in the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey because of their gas-rich nature and extremely faint or missing optical emission in ...
Laurin M. Gray   +13 more
doaj   +1 more source

Infrared Properties of Star-forming Dwarf Galaxies. I. Dwarf Irregular Galaxies in the Local Volume [PDF]

open access: yesThe Astronomical Journal, 2005
A sample of 34 dwarf irregular galaxies in the Local Volume, most nearer than 5 Mpc, has been imaged in the near-infrared (NIR) in J and K_s at CFHT in Hawaii and OAN-SPM in Mexico. In CFHT images, stars brighter than M_Ks=-7.5 were resolved. In most cases, the resolved population represents less than 5% of the total NIR flux in K_s.
Vaduvescu, Ovidiu   +3 more
openaire   +2 more sources

Coevolution of Dust and Chemistry in Galaxy Simulations with a Resolved Interstellar Medium

open access: yesThe Astrophysical Journal, 2023
Nearby dwarf irregular galaxies are ideal laboratories for studying the interstellar medium (ISM) at low metallicity, which is expected to be common for galaxies at very high redshift being observed by JWST. We present the first high-resolution (∼0.2 pc)
Chia-Yu Hu   +2 more
doaj   +1 more source

The HI column density distribution function in faint dwarf galaxies

open access: yes, 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

OLD GLOBULAR CLUSTERS IN MAGELLANIC-TYPE DWARF IRREGULAR GALAXIES

open access: yesThe Astronomical Journal, 2008
We present a study of the old globular clusters (GC) using archival F606W and F814W HST/ACS images of 19 Magellanic-type dwarf Irregular (dIrr) galaxies found in nearby (2 - 8 Mpc) associations of only dwarf galaxies. All dIrrs have absolute magnitudes fainter than or equal to the SMC (Mv = -16.2 mag).
Georgiev, Iskren Y.   +3 more
openaire   +2 more sources

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