Zobrazeno 1 - 10
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pro vyhledávání: '"Pustilnik, Simon A."'
We present and discuss the results of the Giant Metrewave Radio Telescope (GMRT) HI 21-cm line mapping for five isolated low-mass (M_bary ~(2--8)*10^7 Mo) eXtremely Metal Poor (XMP) dwarfs [12+log(O/H)=7.13-7.28], selected from the Nearby Void Galaxy
Externí odkaz:
http://arxiv.org/abs/2312.03599
We construct mass models of eight gas rich dwarf galaxies that lie in the Lynx-Cancer void. From NFW fits to the dark matter halo profile, we find that the concentration parameters of halos of void dwarf galaxies are similar to those of dwarf galaxie
Externí odkaz:
http://arxiv.org/abs/1911.11877
Autor:
Perepelitsyna, Yulia, Pustilnik, Simon
The lowest metallicity massive stars in the Local Universe with Z~(Zo/50-Zo/30) are the crucial objects to test the validity of assumptions in the modern models of very low-metallicity massive star evolution. These models, in turn, have major implica
Externí odkaz:
http://arxiv.org/abs/1812.03686
Akademický článek
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Mass and specific angular momentum are two fundamental physical parameters of galaxies. We present measurements of the baryonic mass and specific angular momentum of 11 void dwarf galaxies derived from neutral hydrogen (H{\sc i}) synthesis data. Rota
Externí odkaz:
http://arxiv.org/abs/1805.09735
Autor:
Pustilnik, Simon A.
The intermediate results of the ongoing study of deep samples of ~200 galaxies residing in nearby voids, are presented. Their properties are probed via optical spectroscopy, ugri surface photometry, and HI 21-cm line measurements, with emphasis on th
Externí odkaz:
http://arxiv.org/abs/1412.1316
Publikováno v:
MNRAS, 415, 1188-1201 (2011)
The evolution of galaxies is influenced by the environment in which they reside. This effect should be strongest for the least-mass and -luminosity galaxies. To study dwarf galaxies in extremely low density environments we have compiled a deep catalo
Externí odkaz:
http://arxiv.org/abs/1105.3034
(abridged) An object classified as a galaxy in on-line data bases and revealed on sky survey images as a distant ring galaxy is a rare case of polar ring galaxy where the ring is only slightly inclined to the equatorial plane of the central body. SDS
Externí odkaz:
http://arxiv.org/abs/0910.0589
Autor:
Kniazev, Alexei, Brosch, Noah, Hoffman, G. Lyle, Grebel, Eva K., Zucker, Daniel B., Pustilnik, Simon A.
We investigate the spatial extent and structure of the Pegasus dwarf irregular galaxy using deep, wide-field, multicolour CCD photometry from the Sloan Digital Sky Survey (SDSS) and new deep HI observations. We study an area of ~0.6 square degrees ce
Externí odkaz:
http://arxiv.org/abs/0908.3621
We present Giant Metrewave Radio Telescope (GMRT), HI 21cm observations of SBS 0335-052E and SBS 0335-052W, a close pair of dwarf galaxies, which are further unusual in being the most metal-poor star-forming galaxies known. We present images at sever
Externí odkaz:
http://arxiv.org/abs/0904.4797