Results 61 to 70 of about 599,828 (297)
What Does the Milky Way Look Like?
The Astrophysical Journal, 2023 In spite of much work, the overall spiral structure morphology of the Milky Way remains somewhat uncertain. In the last two decades, accurate distance measurements have provided us with an opportunity to solve this issue.
Y. Xu +7 more
doaj +1 more source
THE ROLE OF THE MAGNETIC FIELD IN THE INTERSTELLAR MEDIUM OF THE POST-STARBURST DWARF IRREGULAR GALAXY NGC 1569 [PDF]
, 2010 NGC 1569 is a nearby dwarf irregular galaxy which underwent an intense burst of star formation 10–40 Myr ago. We present observations that reach surface brightnesses 2–80 times fainter than previous radio continuum observations and the first radio ...
A. Kepley +5 more
semanticscholar +1 more source
Cosmic-ray driven dynamo in the medium of irregular galaxy [PDF]
, 2009 We investigate the cosmic ray driven dynamo in the interstellar medium of irregular galaxy. The observations (Chyzy et al. 2000, 2003) show that the magnetic field in irregular galaxies is present and its value reaches the same level as in spiral ...
Chyży +7 more
core +6 more sources
The Astrophysical Journal, 2023 The presence of transitional dwarf galaxies in filaments and cluster outskirts may be closely related to preprocessing in the filament; however, the underlying mechanism is not yet comprehensively understood.
Jiwon Chung +3 more
doaj +1 more source
THE ACS LCID PROJECT. II. FAINT VARIABLE STARS IN THE ISOLATED DWARF IRREGULAR GALAXY IC 1613 [PDF]
, 2010 We present the results of a new search for variable stars in the Local Group (LG) isolated dwarf galaxy IC 1613, based on 24 orbits of F475W and F814W photometry from the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope.
E. Bernard +8 more
semanticscholar +1 more source
Global properties of irregular galaxies
The Astrophysical Journal Supplement Series, 1982 We present optical and radio observations of global properties for a sample of noninteracting irregular galaxies and a few comparison objects. Program galaxies were chosen primarily on the basis of their blue colors and thus may be expected to represent systems with high rates of star formation.
D. A. Hunter +2 more
openaire +2 more sources
Deep CO Observations and the CO-to-H2 Conversion Factor in DDO 154, a Low Metallicity Dwarf Irregular Galaxy [PDF]
, 2010 We present a deep spectroscopic search for CO emission in the dwarf irregular galaxy DDO 154, which has an Oxygen abundance of only 1=20 of the solar value.
S. Komugi +6 more
semanticscholar +1 more source
A Survey of Galaxy Pairs in the SDSS Photometric Images based on Faster-RCNN
The Astronomical JournalGalaxy pairs hold significant importance in understanding the evolution of galaxies, and the extensive search for a large sample of galaxy pairs is meaningful.
Chen-hui Shi +7 more
doaj +1 more source
Chemical behavior of the dwarf irregular galaxy NGC6822. Its PN and HII region abundances [PDF]
, 2009 Aims. We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822. The selected objects are distributed in different zones of the galaxy.
L. Hernández-Martínez +3 more
semanticscholar +1 more source
Nitrogen in irregular galaxies
The Astrophysical Journal, 1990 A study of nitrogen in giant H II regions located within low-abundance irregular galaxies is presented. Both observations and theoretical models are used to examine variations in the abundance of nitrogen relative to oxygen in these galaxies. Analysis of these and previously published observations suggests that the use of low spectral resolution is the
openaire +2 more sources