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相关论文: Evidence for recent star formation in BCGs: a corr…

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Many brightest cluster galaxies (BCGs) at the centers of X-ray selected clusters exhibit clear evidence for recent star formation. However, studies of BCGs in optically-selected clusters show that star formation is not enhanced when…

星系天体物理 · 物理学 2011-03-22 Jing Wang , Roderik Overzier , Guinevere Kauffmann , Anja von der Linden , Xu Kong

We present the results of GALEX observations of 17 cool core (CC) clusters of galaxies. We show that GALEX is easily capable of detecting star formation in brightest cluster galaxies (BCGs) out to $z\ge 0.45$ and 50-100 kpc. In most of the…

宇宙学与河外天体物理 · 物理学 2015-05-19 Amalia Hicks , Richard F. Mushotzky , Megan Donahue

We present IR and UV photometry for a sample of brightest cluster galaxies (BCGs). The BCGs are from a heterogeneous but uniformly characterized sample, the Archive of Chandra Cluster Entropy Profile Tables (ACCEPT), of X-ray galaxy…

宇宙学与河外天体物理 · 物理学 2015-06-03 Aaron S. Hoffer , Megan Donahue , Amalia Hicks , R. S. Barthelemy

We present measurements of surface brightness and colour profiles for the brightest cluster galaxies (BCGs) in a sample of 48 X-ray luminous galaxy clusters. These data were obtained as part of the Canadian Cluster Comparison Project…

天体物理学 · 物理学 2009-11-13 C. Bildfell , H. Hoekstra , A. Babul , A. Mahdavi

A fraction of brightest cluster galaxies (BCGs) shows bright emission in the UV and the blue part of the optical spectrum, which has been interpreted as evidence of recent star formation. Most of these results are based on the analysis of…

星系天体物理 · 物理学 2016-01-27 S. I. Loubser , A. Babul , H. Hoekstra , A. Mahdavi , M. Donahue , C. Bildfell , G. M. Voit

We present UV broadband photometry and optical emission-line measurements for a sample of 32 Brightest Cluster Galaxies (BCGs) in clusters of the Representative XMM-Newton Cluster Structure Survey (REXCESS) with z = 0.06-0.18. The REXCESS…

We present recent results from a GALEX investigation of star formation in 16 cooling core clusters of galaxies, selected to span a broad range in both redshift and central cooling time. Initial results demonstrate clear UV excesses in most,…

宇宙学与河外天体物理 · 物理学 2015-05-14 Amalia Hicks , Richard F. Mushotzky , Megan Donahue

Blue compact galaxies (BCGs) are compact galaxies that are dominated by intense star formation. Comparing the observational properties with the predictions of stellar population synthesis model, we have analyzed the nuclear stellar…

天体物理学 · 物理学 2007-05-23 X. Kong , F. Z. Cheng

The numerous and massive young star clusters in blue compact galaxies (BCGs) are used to investigate the properties of their hosts. We test whether BCGs follow claimed relations between cluster populations and their hosts, such as the the…

宇宙学与河外天体物理 · 物理学 2015-05-28 Angela Adamo , Goeran Ostlin , Erik Zackrisson

CONTEXT:At low redshift, early-type galaxies often exhibit a rising flux with decreasing wavelength in the 1000-2500 \AA{} range, called "UV upturn". The origin of this phenomenon is debated, and its evolution with redshift is poorly…

星系天体物理 · 物理学 2018-03-21 S. Boissier , O. Cucciati , A. Boselli , S. Mei , L. Ferrarese

We have used the GALEX UV photometric data to construct a first near-ultraviolet (NUV) color-magnitude relation (CMR) for the galaxies pre-classified as early-type by SDSS studies. The NUV CMR is a powerful tool for tracking the recent star…

Quillen et al. and O'Dea et al. carried out a Spitzer study of a sample of 62 brightest cluster galaxies (BCGs) from the ROSAT Brightest Cluster Sample chosen based on their elevated H-alpha flux. We present Hubble Space Telescope Advanced…

We present a study of the evolution of brightest cluster galaxies (BCGs) in a sample of clusters at $0.05 \leq z<0.35$ from the SDSS and WISE with halo masses in the range $6 \times 10^{13}M_\odot$ (massive groups) - $10^{15.5}M_\odot$…

星系天体物理 · 物理学 2019-06-12 Pierluigi Cerulo , Gustavo A. Orellana , Giovanni Covone

Brightest cluster galaxies (BCGs) are usually quiescent, but many exhibit star formation. Here we exploit the opportunity provided by rest-frame UV imaging of galaxy clusters in the CLASH (Cluster Lensing and Supernovae with Hubble)…

We set the stage for reassessing how star formation, emission-line nebulae, and active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs) depend on the thermodynamics of the intracluster medium (ICM). Our work is based on the 25…

星系天体物理 · 物理学 2024-08-06 Arsen Levitskiy , Jeremy Lim , Youichi Ohyama , Juno Li , Megan Donahue

We use GALEX/optical photometry to construct color-color relationships for early-type galaxies sorted by morphological type. We have matched objects in the GALEX GR1 public release and the first IR1.1 internal release, with the RC3…

This paper is part of a series devoted to the investigation of a large sample of brightest cluster galaxies (BCGs), their properties and the relationships between these and the properties of the host clusters. In this paper, we compare the…

宇宙学与河外天体物理 · 物理学 2015-05-19 S. I. Loubser , P. Sanchez-Blazquez

The CLASH X-ray selected sample of 20 galaxy clusters contains ten brightest cluster galaxies (BCGs) that exhibit significant ($>$5 $\sigma$) extinction-corrected star formation rates (SFRs). Star formation activity is inferred from…

星系天体物理 · 物理学 2015-11-11 Kevin Fogarty , Marc Postman , Thomas Connor , Megan Donahue , John Moustakas

We present GALEX near-UV (NUV) and 2MASS J band photometry for red sequence galaxies in local clusters. We define quiescent samples according to a strict emission threshold, removing galaxies with very recent star formation. We analyse the…

天体物理学 · 物理学 2009-11-13 Timothy D. Rawle , Russell J. Smith , John R. Lucey , Michael J. Hudson , Gary A. Wegner

Despite their reputation as being "red and dead", the unique environment inhabited by Brightest Cluster Galaxies (BCGs) can often lead to a self-regulated feedback cycle between radiatively cooling intracluster gas and star formation and…

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