Southern GEMS groups - I. Dynamical properties
نویسندگان
چکیده
منابع مشابه
Southern GEMS Groups I: Dynamical Properties
Here we present an investigation of the properties of 16 nearby galaxy groups and their constituent galaxies. The groups are selected from the Group Evolution Multiwavelength Study (GEMS) and all have X-ray as well as wide-field neutral hydrogen (HI) observations. Group membership is determined using a friends-of-friends algorithm on the positions and velocities from the 6-degree Field Galaxy S...
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Here we present Australia Telescope Compact Array H i maps of 16 H i sources in six Group Evolution Multiwavelength Study (GEMS) groups that were previously observed with the Parkes telescope. The higher spatial resolution of the ATCA allows us to clearly identify the optical counterparts for the first time – most being associated with low surface brightness late-type galaxies. New integrated H...
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Let V be a vector bundle of constant rank n ≥ 1 over a scheme S, and let q : V → L be a quadratic form valued in a line bundle L, so we get a symmetric bilinear form Bq : V × V → L defined by Bq(x, y) = q(x+ y)− q(x)− q(y). Assume q is fiberwise non-zero over S, so (q = 0) ⊂ P(V ∗) is an S-flat hypersurface with fibers of dimension n − 2 (understood to be empty when n = 1). By HW2, Exercise 4 (...
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We investigate the neutral hydrogen (H i) content of sixteen groups for which we have multi-wavelength data including X-ray observations. Wide-field imaging of the groups was obtained with the 20-cm multibeam system on the 64-m Parkes telescope. We have detected ten previously uncatalogued H i sources, one of which has no visible optical counterpart. We examine the H i properties of the groups,...
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Context. Multi-wavelength observations of Hickson’s Compact Groups (HCGs) have shown that many of these groups are physical bound structures and are in different stage of evolution, from spiral-dominated systems to almost merged objects. Very few studies have analysed the Southern Compact Groups (SCGs) sample, which is though to be younger that HCGs, due to an on average higher number of spiral...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2006
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2006.10542.x