Results 91 to 100 of about 12,211 (252)
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
BVR photometry of the resolved dwarf galaxy Ho IX
, 2004 We present BVR CCD photometry down to limiting magnitude B=23.5 mag for 232 starlike objects and 11 diffuse objects in a 5.4' x 5.4' field of Ho IX. The galaxy is a gas-rich irregular dwarf galaxy possibly very close to M 81, which makes it especially ...
Aparicio +40 more
core +1 more source
The Karl G. Jansky Very Large Array Local Group L-Band Survey (LGLBS)
The Astrophysical Journal Supplement SeriesWe present the Local Group L -Band Survey, a Karl G. Jansky Very Large Array (VLA) survey producing the highest-quality 21 cm and 1–2 GHz radio continuum images to date, for the six VLA-accessible, star-forming, Local Group galaxies. Leveraging the VLA’s
Eric W. Koch +47 more
doaj +1 more source
What is the (Dark) Matter with Dwarf Galaxies?
, 2010 We present cosmological hydrodynamical simulations of the formation of dwarf galaxies in a representative sample of haloes extracted from the Millennium-II Simulation.
Aarseth +92 more
core +1 more source
The Interstellar Medium in I Zw 18 Seen with JWST/MIRI. I. Highly Ionized Gas
The Astrophysical JournalWe present JWST/MIRI spectra from the Medium-Resolution Spectrometer of I Zw 18, a nearby dwarf galaxy with a metallicity of ∼3% solar. Its proximity enables a detailed study of highly ionized gas that can be interpreted in the context of newly ...
L. K. Hunt +21 more
doaj +1 more source
Spectral Energy Distributions for 258 Local Volume Galaxies
The Astronomical Journal, 2023 We present model spectral energy distribution (SED) fits to ultraviolet/optical/infrared observations for the 258 nearby galaxies in the Local Volume Legacy survey, a sample dominated by lower-luminosity dwarf irregular systems.
Daniel A. Dale +5 more
doaj +1 more source
Thick gas discs in faint dwarf galaxies
, 2010 We determine the intrinsic axial ratio distribution of the 'gas' disks of extremely faint M_B > -14.5 dwarf irregular galaxies. We start with the measured (beam corrected) distribution of apparent axial ratios in the HI 21cm images of dwarf irregular ...
Ayesha Begum +31 more
core +1 more source
Dwarf Spheroidal Satellite Formation in a Reionized Local Group [PDF]
, 2014 Dwarf spheroidal satellite galaxies have emerged a powerful probe of small-scale dark matter clustering and of cosmic reionization. They exhibit structural and chemical continuity with dwarf irregular galaxies in the field and with spheroidal galaxies in
Bromm, Volker, Milosavljevic, Milos
core +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
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