Results 11 to 20 of about 826 (184)
On the environments of giant radio galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We test the hypothesis that environments play a key role in enabling the growth of enormous radio structures spanning more than 700 kpc, an extreme population of radio galaxies called giant radio galaxies (GRGs). To achieve this, we explore (1) the relationships between the occurrence of GRGs and the surface number density of ...
Ting-Wen Lan 藍鼎文 +1 more
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A giant protocluster of galaxies at redshift 5.7 [PDF]
Nature Astronomy, 2018 Galaxy clusters trace the largest structures of the Universe and provide ideal laboratories for studying galaxy evolution and cosmology. Clusters with extended X-ray emission have been discovered at redshifts up to z ~ 2.5. Meanwhile, there has been growing interest in hunting for protoclusters, the progenitors of clusters, at higher redshifts.
Jiang, L. +15 more
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Spectroscopy of Giants of the Sagittarius Dwarf Galaxy [PDF]
Astrophysics and Space Science, 1999 To be published in the proceedings of Galaxy evolution:Connecting the distant Universe with the local fossil record.
Bonifacio, P. +3 more
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ARE DISK GALAXIES THE PROGENITORS OF GIANT ELLIPTICALS? [PDF]
The Astrophysical Journal, 2008 A popular formation scenario for giant elliptical galaxies proposes that they might have formed from binary mergers of disk galaxies. Difficulties with the scenario that emerged from earlier studies included providing the necessary stellar mass and metallicity, maintaining the tight color-magnitude relation and avoiding phase space limits.
Naab, Thorsten, Ostriker, Jeremiah P.
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Galaxy And Mass Assembly (GAMA): A “No Smoking” Zone for Giant Elliptical Galaxies? [PDF]
The Astrophysical Journal, 2017 Abstract We study the radio emission of the most massive galaxies in a sample of dynamically relaxed and unrelaxed galaxy groups from the Galaxy and Mass Assembly survey. The dynamical state of the group is defined by the stellar dominance of the brightest group galaxy (BGG), e.g., the luminosity gap between the two most luminous members,
Habib G. Khosroshahi +10 more
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On the Unification of Dwarf and Giant Elliptical Galaxies [PDF]
, 2004 The near orthogonal distributions of dwarf elliptical (dE) and giant elliptical (E) galaxies in the μe-M and μe-log(Re) diagrams have been interpreted as evidence for two distinct galaxy formation processes. However, continuous, linear relationships across the alleged dE/E boundary at MB = -18 mag - such as the relationships between central surface ...
Graham, Alister, Guzman, Rafael
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Cold dust in the giant barred galaxy NGC 1365 [PDF]
Astronomy & Astrophysics, 2013 Observations of galaxies at sub-millimeter wavelengths, where the emission is mainly due to cold dust, are required to constrain the dust physical properties and provide important insight on the gas content of galaxies. We mapped NGC1365 at 870um with LABOCA, the Large APEX Bolometer Camera, allowing us to probe the central mass concentration as well ...
Tabatabaei, F. +7 more
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Giant halos in dwarf irregular galaxies vs. dwarf elliptical galaxies [PDF]
Proceedings of the International Astronomical Union, 2005 We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the optical images, and 2) it is elongated in the direction almost perpendicular to the HI disk of NGC 6822.
Lee, Myung Gyoon, Hwang, Narae
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The (galaxy-wide) IMF in giant elliptical galaxies: from top to bottom [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 8 pages, 5 figures, accepted for publication in ...
Weidner, Carsten +3 more
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Giant disc galaxies: where environment trumps mass in galaxy evolution [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 We identify some of the most HI massive and fastest rotating disk galaxies in the local universe with the aim of probing the processes that drive the formation of these extreme disk galaxies. By combining data from the Cosmic Flows project, which has consistently reanalyzed archival galaxy HI profiles, and 3.6$μ$m photometry obtained with the Spitzer ...
Courtois, H.M. +3 more
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