The evolution of dwarf galaxies in the Coma supercluster

  title={The evolution of dwarf galaxies in the Coma supercluster},
  author={Smriti Mahajan and Chris P. Haines and Somak Raychaudhury},
  journal={Monthly Notices of the Royal Astronomical Society},
We employ spectroscopic and photometric data from the Sloan Digital Sky Survey Data Release 7, in a 500-deg 2 region, to understand the evolution of dwarf [~(M* + 2) < M z < M * + 4] galaxies in the Coma supercluster (z = 0.023). We show that in the Coma supercluster, the red dwarf galaxies are mostly concentrated in the dense cores of the Coma and Abell 1367 clusters, and in the galaxy groups embedded in the filament connecting them. The post-starburst (k+A) dwarfs, however, are found in the… Expand

Figures from this paper

Evolution of galaxies in groups in the Coma Supercluster
We take a close look at the galaxies in the Coma Supercluster and assess the role of the environment (in the form of cluster, group and supercluster filament) in their evolution, in particularExpand
Dwarf Galaxies in the Core of Coma Cluster
Abstract Dwarf galaxies constitute 18% of the galaxies in the core of the Coma Cluster. We present the correlation between structural properties and morphology of galaxies in the central region ofExpand
Evidence for galaxies being pre-processed before accreted into clusters
I use the spectroscopic data for galaxies in and around 28 nearby (0.02 ≤ z ≤ 0.06) X-ray bright galaxy clusters, to show that the incidence of k+A (or post-starburst) galaxies (EW(Ha) 3A inExpand
Studying star forming dwarf galaxies in Abell 779, Abell 1367, Coma, and Hercules clusters
Context. We continue to study star formation in dwarf galaxies located in nearby clusters. Aims. Known physical and chemical relations outlining the formation and evolution of dwarfs is compared inExpand
Environmental quenching and hierarchical cluster assembly: Evidence from spectroscopic ages of red-sequence galaxies in Coma
We explore the variation in stellar population ages for Coma cluster galaxies as a function of projected cluster-centric distance, using a sample of 362 red-sequence galaxies with highExpand
The velocity modulation of galaxy properties in and near clusters: quantifying the decrease in star formation in backsplash galaxies
Ongoing or recent star formation in galaxies is known to increase with increasing projected distance from the centre of a cluster out to several times its virial radius (Rv). Using a complete sampleExpand
ACCESS – IV. The quenching of star formation in a cluster population of dusty S0s
We present an analysis of the mid-infrared (MIR) colours of 165 70-μm-detected galaxies in the Shapley supercluster core (SSC) at z= 0.048 using panoramic Spitzer/MIPS 24- and 70-μm imaging. WhileExpand
An expanded catalogue of low surface brightness galaxies in the Coma cluster using Subaru/Suprime-Cam
We present a catalogue of low surface brightness (LSB) galaxies in the Coma cluster obtained from deep Subaru/Suprime-Cam V- and R-band imaging data within a region of $\mathord {\sim }4$ deg2. WeExpand
We have used deep GALEX observations at the infall region of the Coma cluster to measure the faintest UV luminosity functions (LFs) presented for a rich galaxy cluster thus far. The Coma UV LFs areExpand
Plunging fireworks: Why do infalling galaxies light up on the outskirts of clusters?
Integrated star formation rate (SFR) and specific star formation rate (SFR/M*), derived from the spectroscopic data obtained by the Sloan Digital Sky Survey (SDSS) data release 4 (DR4), are used toExpand


Star formation, starbursts and quenching across the Coma supercluster
We analyse Spitzer MIPS 24� m observations, and Sloan Digital Sky Survey (DR7) optical broadband photometry and spectra, to investigate the star formation properties of galaxies residing in the ComaExpand
A Comparison of the Galaxy Populations in the Coma and Distant Clusters: The Evolution of k+a Galaxies and the Role of the Intracluster Medium
The spectroscopic properties of galaxies in the Coma Cluster are compared with those of galaxies in rich clusters at z ~ 0.5, to investigate the evolution of the star formation history in clusters.Expand
Star formation in galaxies falling into clusters along supercluster-scale filaments
With the help of a statistical parameter derived from optical spectra, we show that the current star formation rate of a galaxy, falling into a cluster along a supercluster filament, is likely toExpand
The different environmental dependencies of star formation for giant and dwarf galaxies
We examine the origins of the bimodality observed in the global properties of galaxies around a stellar mass of 3 × 1010 M☉ by comparing the environmental dependencies of star formation for the giantExpand
A Photometric and Spectroscopic Study of Dwarf and Giant Galaxies in the Coma Cluster. III. Spectral Ages and Metallicities
We present a detailed analysis of the spectroscopic catalog of galaxies in the Coma Cluster from Mobasher et al. (Paper II of the series). This catalog comprises ~300 spectra of cluster members withExpand
A spectroscopic survey of dwarf galaxies in the Coma cluster: stellar populations, environment and downsizing
We investigate the stellar populations in a sample of 89 faint red galaxies in the Coma cluster, using high signal-to-noise ratio (S/N) spectroscopy from the 6.5-m MMT. Our sample is drawn from twoExpand
The Star Formation Histories of Galaxies in Distant Clusters
We present a detailed analysis of the spectroscopic catalog of galaxies in 10 distant clusters from Dressler et al. We investigate the nature of the different spectral classes defined by Dressler etExpand
Structural Parameters of Dwarf Galaxies in the Coma Cluster: On the Origin of dS0 Galaxies
In this paper we analyze the structural parameters of the dwarf galaxies in the Coma Cluster with -18 ≤ MB ≤ -16 and classify them into two types; those with surface brightness profiles well fittedExpand
The Origin of Dwarf Ellipticals in the Virgo Cluster
We study the evolution of dwarf (LH < 109.6 LH☉) star-forming and quiescent galaxies in the Virgo Cluster by comparing their UV to radio centimetric properties to the predictions of multizoneExpand
The Different Physical Mechanisms that Drive the Star-Formation Histories of Giant and Dwarf Galaxies
We present an analysis of star formation and nuclear activity in galaxies as a function of both luminosity and environment in the fourth data release of the Sloan Digital Sky Survey. Using a sampleExpand