Results 151 to 160 of about 722,598 (307)
Statistics of HI Extents of Irregular Galaxies [PDF]
Symposium - International Astronomical Union, 1996 Using the 3.′2 Arecibo beam, we have mapped the HI envelopes of a sample of 70 irregular galaxies (Sdm, Sm, Im and BCD), including 45 from the Virgo Cluster Catalog, 14 Field galaxies at similar redshifts, and 11 Nearby dwarfs chosen to give a complete sample out to 6 Mpc, within the Arecibo declination range.
openaire +2 more sources
An Evaluation of Antarctic Ice Core Nitrate Records as a Proxy for Solar Activity
Earth and Space Science, Volume 11, Issue 12, December 2024.Abstract Nitrate (NO3−) deposition in polar ice sheets archives valuable information on past solar activity. However, interpretation of Antarctic ice core NO3− records as a proxy for past solar activity remains challenging due to multiple sources and processes controlling NO3− variability in ice core records.
C. M. Laluraj +2 more
wiley +1 more source
THE H-I DISTRIBUTION IN AN EXTREMELY FAINT DWARF IRREGULAR GALAXY M81-DWA
, 1983 We have used the Westerbork synthesis radio telescope to investigate the distribution of neutral hydrogen in an extremely faint, dwarf, irregular galaxy, M81 dwA, which was discovered by Lo and Sargent in a search for intergalactic H I clouds.
W. Sargent, R. Sancisi, K. Lo
semanticscholar +1 more source
The metallicity - redshift relations for emission-line SDSS galaxies: examination of the dependence on the star formation rate [PDF]
, 2013 We analyse the oxygen abundance and specific star formation rates (sSFR) variations with redshift in star-forming SDSS galaxies of different masses. We find that the maximum value of the sSFR, sSFRmax, decreases when the stellar mass, Ms, of a galaxy increases, and decreases with decreasing of redshift.
arxiv +1 more source
Ionized gas in the nuclei of elliptical, so, spiral, and irregular galaxies [PDF]
Ionized gas in elliptical, SO, spiral, and irregular galaxy ...
Burbidge, E. M., Burbidge, G. R.
core +1 more source
Space Weather, Volume 22, Issue 12, December 2024.Abstract Space weather events, including solar flares, coronal mass ejections, and geomagnetic storms, have significant effects on various transportation systems. This review provides a comprehensive examination of the current understanding and future outlook of space weather effects on air, maritime, railway, and ground transportation. It explores the
Dabin Xue +5 more
wiley +1 more source
Star formation in the Magellanic irregular galaxy NGC 4449
, 1987 New NIR and FIR maps and J = 1-0 CO spectroscopy of the Magellanic irregular galaxy NGC 4449 are presented. The brighter 150-micron emission is concentrated along the central visual ridge of the galaxy, although there is lower intensity extended emission
H. Thronson +4 more
semanticscholar +1 more source
A γ-Ray-emitting Collisional Ring Galaxy System in Our Galactic Neighborhood
The Astrophysical Journal LettersThe astrophysical γ -ray photons carry the signatures of the violent phenomena happening on various astronomical scales in our Universe. This includes supernova remnants, pulsars, and pulsar wind nebulae in the Galactic environment and extragalactic ...
Vaidehi S. Paliya, D. J. Saikia
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
Interstellar gas motions around massive star formation regions in the nearby dwarf galaxy DDO43
Acta PolytechnicaAreas of massive star formation are strongly influenced by stellar winds and supernovae, therefore, enhanced turbulent flows are expected. We analyse high-quality Karl G. Jansky Very Large Array observations of the neutral hydrogen gas content of DDO43,
Enikő Pichler +4 more
doaj +1 more source