Toward an unbiased sample of X-ray selected normal galaxies outside the local Universe

2008 ◽  
Vol 329 (2) ◽  
pp. 174-177 ◽  
Author(s):  
A. Georgakakis
Keyword(s):  
Local Universe ◽  
X Ray ◽  
Normal Galaxies

X-ray properties of normal galaxies in the local universe

2010 ◽  
Author(s):  
Ginevra Trinchieri ◽  
A. Comastri ◽  
L. Angelini ◽  
M. Cappi
Keyword(s):  
Local Universe ◽  
X Ray ◽  
Normal Galaxies

scholarly journals An X-ray view of central engines of low-luminosity quasars (LLQSO) in the local Universe

2018 ◽  
Vol 480 (2) ◽  
pp. 1522-1546 ◽  
Author(s):  
Sibasish Laha ◽  
Ritesh Ghosh ◽  
Matteo Guainazzi ◽  
Alex G Markowitz
Keyword(s):  
Local Universe ◽  
X Ray

scholarly journals Host galaxy properties of X-ray active galactic nuclei in the local Universe

2021 ◽  
Author(s):  
L. Koutoulidis ◽  
G. Mountrichas ◽  
I. Georgantopoulos ◽  
E. Pouliasis ◽  
M. Plionis
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Host Galaxy ◽  
Local Universe ◽  
X Ray

X-Ray Study of Normal Galaxies with Ginga

1990 ◽  
pp. 243-253 ◽  
Author(s):  
T. Ohashi ◽  
K. Makishima ◽  
T. Mihara ◽  
T. Tsuru ◽  
H. Awaki ◽  
...  
Keyword(s):  
X Ray ◽  
Normal Galaxies

scholarly journals Chandra COSMOS Legacy Survey: Clustering dependence of Type 2 active galactic nuclei on host galaxy properties

2019 ◽  
Vol 632 ◽  
pp. A88
Author(s):  
V. Allevato ◽  
A. Viitanen ◽  
A. Finoguenov ◽  
F. Civano ◽  
H. Suh ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Large Scale ◽  
Formation Rate ◽  
Galactic Nuclei ◽  
Stellar Mass ◽  
Host Galaxy ◽  
X Ray ◽  
Normal Galaxies ◽  
Massive Halos

Aims. We perform clustering measurements of 800 X-ray selected Chandra COSMOS Legacy (CCL) Type 2 active galactic nuclei (AGN) with known spectroscopic redshift to probe the halo mass dependence on AGN host galaxy properties, such as galaxy stellar mass Mstar, star formation rate (SFR), and specific black hole accretion rate (BHAR; λBHAR) in the redshift range z = [0−3]. Methods. We split the sample of AGN with known spectroscopic redshits according to Mstar, SFR and λBHAR, while matching the distributions in terms of the other parameters, including redshift. We measured the projected two-point correlation function wp(rp) and modeled the clustering signal, for the different subsamples, with the two-halo term to derive the large-scale bias b and corresponding typical mass of the hosting halo. Results. We find no significant dependence of the large-scale bias and typical halo mass on galaxy stellar mass and specific BHAR for CCL Type 2 AGN at mean z ∼ 1, while a negative dependence on SFR is observed, i.e. lower SFR AGN reside in richer environment. Mock catalogs of AGN, matched to have the same X-ray luminosity, stellar mass, λBHAR, and SFR of CCL Type 2 AGN, almost reproduce the observed Mstar − Mh, λBHAR − Mh and SFR–Mh relations, when assuming a fraction of satellite AGN fAGNsat ∼ 0.15. This corresponds to a ratio of the probabilities of satellite to central AGN of being active Q ∼ 2. Mock matched normal galaxies follow a slightly steeper Mstar − Mh relation, in which low mass mock galaxies reside in less massive halos than mock AGN of similar mass. Moreover, matched mock normal galaxies are less biased than mock AGN with similar specific BHAR and SFR, at least for Q >  1.

scholarly journals Revised activity types for Markarian galaxies

2013 ◽  
Vol 9 (S304) ◽  
pp. 41-42
Author(s):  
A. M. Mickaelian ◽  
H. V. Abrahamyan ◽  
G. S. Harutyunyan ◽  
G. M. Paronyan
Keyword(s):  
Ir Spectra ◽  
Wavelength Range ◽  
Spectroscopic Data ◽  
Active Galaxies ◽  
The Other ◽  
Optical Range ◽  
X Ray ◽  
Normal Galaxies ◽  
Activity Types ◽  
Uv Excess

AbstractThe sample of Markarian galaxies consists of 1515 UV-excess galaxies containing many active galaxies, both AGN and Starburst (SB). Several catalogs of Markarian galaxies have been published; however activity types are based on old spectroscopic data. The SDSS spectroscopy and some other recent spectral observations allow classify or re-classify many of Markarian galaxies, altogether we have retrieved and studied 779 SDSS and 300 other spectra. Out of 779 SDSS spectra, we have classified 533 HII, 31 Composites, 12 LINERs, 4 S2.0, 5 S1.9, 8 S1.8, 5 NLS1.5, 11 S1.5, 8 NLS1.2, 21 S1.2, 4 NLS1, 4 S1.0, 2 QSO, 11 AGN (without an exact class), 52 Em (HII or AGN), 65 Abs, and 3 Stars. On the other hand, the galaxies are being classified depending on the fact in which wavelength range they have been observed and studied. E.g. some Sy2 type galaxies turn to be Sy1 when classified in IR. Many hidden AGN (in X-ray and IR) appear to be normal galaxies in optical range. So for better understanding, IR spectra are necessary as well.

The true nature of IRAS-selected, X-ray-luminous 'normal' galaxies in the ROSAT all-sky survey

1994 ◽  
Vol 433 ◽  
pp. L65 ◽  
Author(s):  
Edward C. Moran ◽  
Jules P. Halpern ◽  
David J. Helfand
Keyword(s):  
True Nature ◽  
X Ray ◽  
Normal Galaxies ◽  
Sky Survey
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