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[ABRIDGED] We recently presented evidence of a connection between the brightness profiles of nearby early-type galaxies and the properties of the AGN they host. The radio loudness of the AGN appears to be univocally related to the host's…

天体物理学 · 物理学 2009-11-13 Alessandro Capetti , Barbara Balmaverde

We present a study of the optical brightness profiles of early type galaxies, using a number of samples of radio galaxies and optically selected elliptical galaxies. For the radio galaxy samples--B2 of Fanaroff-Riley type I and 3C of…

天体物理学 · 物理学 2009-11-11 H. R. de Ruiter , P. Parma , A. Capetti , R. Fanti , R. Morganti , L. Santantonio

This is the second of a series of three papers exploring the connection between the multiwavelength properties of AGN in nearby early-type galaxies and the characteristics of their hosts. In Capetti et al. (2005) we presented a study of the…

天体物理学 · 物理学 2009-11-11 B. Balmaverde , A. Capetti

[ABRIDGED] This is the third in a series of three papers exploring the connection between the multiwavelength properties of AGN in nearby early-type galaxies and the characteristics of their hosts. We selected 116 AGN candidates requiring a…

天体物理学 · 物理学 2009-11-11 Alessandro Capetti , Barbara Balmaverde

This is the first of a series of three papers exploring the connection between the multiwavelength properties of AGNs in nearby early-type galaxies and the characteristics of their hosts. We selected two samples, both with high resolution 5…

天体物理学 · 物理学 2009-11-13 Alessandro Capetti , Barbara Balmaverde

In order to determine the incidence of black hole accretion-driven nuclear activity in nearby galaxies, as manifested by their radio emission, we have carried out a high-resolution Multi-Element Radio-Linked Interferometer Network (MERLIN)…

天体物理学 · 物理学 2009-11-11 M. E. Filho , P. D. Barthel , L. C. Ho

We use the ROSAT All-Sky Survey to study the X-ray properties of a sample of 625 groups and clusters of galaxies selected from the Sloan Digital Sky Survey. We stack clusters with similar velocity dispersions and investigate whether their…

天体物理学 · 物理学 2009-11-13 Shiyin Shen , Guinevere Kauffmann , Anja von der Linden , Simon D. M. White , P. N. Best

We construct a sample of 3,516 radio-loud host galaxies of active galactic nuclei (AGN) from the optical Sloan Digital Sky Survey (SDSS) and Faint Images of the Radio Sky at Twenty cm (FIRST). These have 1.4 GHz luminosities in the range…

宇宙学与河外天体物理 · 物理学 2011-08-17 Elizabeth J. A. Mannering , Diana M. Worrall , Mark Birkinshaw

(abbreviated): This paper presents the results of a high resolution radio imaging survey of all known (96) low-luminosity active galactic nuclei (LLAGNs) at D<19Mpc. We find that almost half of all LINERs and low-luminosity Seyferts have…

天体物理学 · 物理学 2009-11-07 N. M. Nagar , H. Falcke , A. S. Wilson , J. S. Ulvestad

(Abridged) We present the results from new 15 ks Chandra-ACIS and 4.9 GHz Very Large Array observations of 13 galaxies hosting low luminosity AGN. This completes the multiwavelength study of a sample of 51 nearby early-type galaxies…

宇宙学与河外天体物理 · 物理学 2015-06-03 Preeti Kharb , A. Capetti , D. J. Axon , M. Chiaberge , P. Grandi , A. Robinson , G. Giovannini , B. Balmaverde , D. Macchetto , R. Montez

Multiwavelength studies indicate that nuclear activity and bulge properties are closely related, but the details remain unclear. To study this further, we combine $Hubble~Space~Telescope$ bulge structural and photometric properties with 1.5…

Hardness-intensity diagrams (HIDs) have been used with great success to study the accretion states and their connection to radio jets in X-ray binaries (XRBs). The analogy between XRBs and active galactic nuclei (AGN) suggests that similar…

天体物理学 · 物理学 2009-11-11 Elmar Koerding , Sebastian Jester , Rob Fender

We present a multifrequency radio continuum study of seven giant low surface brightness (GLSB) galaxies using the Giant Metrewave Radio Telescope (GMRT). GLSB galaxies are optically faint, dark-matter dominated systems that are poorly…

星系天体物理 · 物理学 2015-06-23 Alka Mishra , N. G. Kantharia , M. Das , D. C. Srivastava , S. N. Vogel

The morphology of quiescent galaxies has been found to be correlated with the activity of their central super massive black hole. In this work, we use data from the first data release of the LOFAR Two$-$Metre Sky Survey (LoTSS DR1) and the…

We investigate the relationship between the mass of central supermassive black holes and the radio loudness of active galactic nuclei. We use the most recent calibrations to derive virial black hole masses for samples of radio loud QSOs for…

宇宙学与河外天体物理 · 物理学 2015-05-28 Marco Chiaberge , Alessandro Marconi

We examine the clustering properties of low-power radio galaxies at redshift 0.4<z<0.8, using data from the 2SLAQ Luminous Red Galaxy (LRG) survey. We find that radio-detected LRGs (with optical luminosities of 3-5L* and 1.4GHz radio powers…

天体物理学 · 物理学 2009-11-13 David A. Wake , Scott M. Croom , Elaine M. Sadler , Helen M. Johnston

We measure the merger fraction of Type 2 radio-loud and radio-quiet active galactic nuclei at z>1 using new samples. The objects have HST images taken with WFC3 in the IR channel. These samples are compared to the 3CR sample of radio…

星系天体物理 · 物理学 2015-06-16 Marco Chiaberge , Roberto Gilli , Jennifer Lotz , Colin Norman

Recent years have seen dramatic progress in the study of the core and nuclear properties of galaxies. The structure of the cores has been shown to vary methodically with global and nuclear properties, as cores respond to the mechanisms by…

天体物理学 · 物理学 2007-05-23 Laura Ferrarese , Patrick Cote , John P. Blakeslee , Simona Mei , David Merritt , Michael J. West

We investigate the relationship between radio power and properties related to active galactic nuclei (AGNs). Radio power at 1.4 or 5 GHz, which has been used in many studies, can be affected by synchrotron self-absorption and free-free…

星系天体物理 · 物理学 2015-06-17 Songyoun Park , Bong Won Sohn , Sukyoung K. Yi

We examine the radio properties of the Brightest Cluster Galaxies (BCGs) in a large sample of X-ray selected galaxy clusters comprising the Brightest Cluster Sample (BCS), the extended BCS (eBCS) and ROSAT-ESO Flux Limited X-ray (REFLEX)…

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