Results 111 to 120 of about 176,382 (265)
Star Formation Histories of the LEGUS Dwarf Galaxies. II. Spatially Resolved Star Formation History of the Magellanic Irregular NGC 4449 [PDF]
, 2018 We present a detailed study of the Magellanic irregular galaxy NGC 4449 based on both archival and new photometric data from the Legacy Extragalactic UV Survey, obtained with the Hubble Space Telescope Advanced Camera for Surveys and Wide Field Camera 3.
E. Sacchi +18 more
semanticscholar +1 more source
The Astrophysical JournalWe present an imaging survey of the Spitzer I star-forming region in NGC 6822 conducted with the NIRCam and MIRI instruments on board JWST. Located at a distance of 490 kpc, NGC 6822 is the nearest non-interacting low-metallicity (∼0.2 Z _⊙ ) dwarf ...
Laura Lenkić +10 more
doaj +1 more source
Evolution of dwarf galaxies: a dynamical perspective [PDF]
, 2013 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 stellar rotation curves (including starbursting dwarfs, irregulars, and spheroidals), and estimate d_{R}V(0) as V(R_d)/
arxiv +1 more source
Numerical simulations of bubble-induced star formation in dwarf irregular galaxies with a novel stellar feedback scheme [PDF]
, 2013 To study the star formation and feedback mechanism, we simulate the evolution of an isolated dwarf irregular galaxy (dIrr) in a fixed dark matter halo, similar in size to Wolf-Lundmark-Melotte, using a new stellar feedback scheme.
D. Kawata +7 more
semanticscholar +1 more source
The Astrophysical JournalMeasuring the relation between star formation and galactic winds is observationally difficult. In this work we make an indirect measurement of the mass-loading factor (the ratio between the mass outflow rate and star formation rate) in low-mass galaxies ...
Erin Kado-Fong +9 more
doaj +1 more source
Stripping of nitrogen-rich AGB ejecta from interacting dwarf irregular galaxies [PDF]
, 2013 Dwarf irregular galaxies (dIrrs) including the Magellanic Clouds in the local Universe, in many cases, exhibit an unusually low N/O abundance ratio (log N/O ~ -1.5) in H II regions as compared with the solar value (~-0.9).
T. Tsujimoto, K. Bekki
semanticscholar +1 more source
Radial variations of the SFHs of dwarf irregular galaxies [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractThe LITTLE THINGS project† has compiled multi-wavelength data (including VLA hi-line emission maps, GALEX FUV/NUV imagery, UBV, narrow-band Hα, and Spitzer images) for a representative sample of nearby dwarf irregular (dIrr) galaxies. The broadband data are used to constrain the radial variations of the star formation (SF) rate (SFR) averaged ...
Andreas Schruba +4 more
openaire +2 more sources
DELAYED STAR FORMATION IN ISOLATED DWARF GALAXIES: HUBBLE SPACE TELESCOPE STAR FORMATION HISTORY OF THE AQUARIUS DWARF IRREGULAR [PDF]
, 2014 We have obtained deep images of the highly isolated (d = 1 Mpc) Aquarius dwarf irregular galaxy (DDO 210) with the Hubble Space Telescope Advanced Camera for Surveys.
A. Cole +6 more
semanticscholar +1 more source
Interaction between the IGM and a dwarf galaxy [PDF]
arXiv, 2014 Dwarf Galaxies are the most common objects in the Universe and are believed to contain large amounts of dark matter. There are mainly three morphologic types of dwarf galaxies: dwarf ellipticals, dwarf spheroidals and dwarf irregulars. Dwarf irregular galaxies are particularly interesting in dwarf galaxy evolution, since dwarf spheroidal predecessors ...
arxiv
H i POWER SPECTRA AND THE TURBULENT INTERSTELLAR MEDIUM OF DWARF IRREGULAR GALAXIES [PDF]
, 2012 H i spatial power spectra were determined for a sample of 24 nearby dwarf irregular galaxies selected from the Local Irregulars That Trace Luminosity Extremes–The H i Nearby Galaxy Survey sample.
Hong-Xin Zhang, D. Hunter, B. Elmegreen
semanticscholar +1 more source