Coma Cluster
نویسندگان
چکیده
منابع مشابه
4 v 1 3 0 Se p 19 97 DIFFUSE RADIO EMISSION IN THE COMA CLUSTER
The Coma cluster is peculiar in the radio domain owing to the presence of cluster-wide diffuse sources: the radio halo Coma C, the relic source 1253+275, and the bridge between them. Diffuse radio sources in clusters are a rare and poorly understood phenomenon. We summarize here the properties of the diffuse radio sources in Coma and their relation to other cluster properties. 1 Radio emission ...
متن کاملAn X-ray Temperature Map of Coma
The Coma cluster of galaxies was long considered to be the archtype of a relaxed virialized cluster in a state of dynamical equilibrium (c.f. Kent and Gunn). There were however conflicting claims that Coma shows substructure, seen as a clumping of galaxies around the brightest galaxies in the cluster (c.f. Baier, Fitchett and Webster, and Mellier et al.). On the other hand, Geller and Beers 5 a...
متن کاملThe Luminosity Function of the Coma Cluster Core for − 25 < M R < − 11
We determine the luminosity function (LF) of galaxies in the core of the Coma cluster for MR ≤ −11.4 (assuming H0 = 75 km s Mpc), a magnitude regime previously explored only in the Local Group. Objects are counted in a deep CCD image of Coma having RMS noise of 27.7 R mag arcsec. A correction for objects in the foreground or background of the Coma cluster—and the uncertainty in this correction—...
متن کاملDeep probing of the Coma cluster . ⋆
ASTRONOMY AND ASTROPHYSICS Deep probing of the Coma cluster. Abstract. As a continuation of our study of the faint galaxy luminosity function in the Coma cluster of galaxies , we report here on the first spectroscopic observations of very faint galaxies (R ≤ 21.5) in the direction of the core of this cluster. Out of these 34 galaxies, only one may have a redshift consistent with Coma, all other...
متن کاملThe dynamical state of the Coma cluster with XMM-Newton
We present in this paper a substructure and spectroimaging study of the Coma cluster of galaxies based on XMM-Newton data. XMM-Newton performed a mosaic of observations of Coma to ensure a large coverage of the cluster. We add the different pointings together and fit elliptical beta-models to the data. We subtract the cluster models from the data and look for residuals, which can be interpreted...
متن کاملar X iv : a st ro - p h / 96 05 09 3 v 1 1 5 M ay 1 99 6 The Early - Type Dwarf - to - Giant Ratio and Substructure in the Coma Cluster
We have obtained new CCD photometry for a sample of ≃ 800 early-type galaxies (dwarf and giant ellipticals) in the central 700 arcmin of the Coma cluster, complete in color and in magnitude to R = 22.5 mag (MR ≃ −12 mag for H0 = 86 km/sec/Mpc). The composite luminosity function for all galaxies in the cluster core (excluding NGC 4874 and NGC 4889) is modeled as the sum of a Gaussian distributio...
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تاریخ انتشار 2006