A sample of X-ray emitting normal galaxies  from the BMW–HRI Catalogue

Tajer, M.; Trinchieri, G.; Wolter, A.; Campana, S.; Moretti, A.; Tagliaferri, G.

doi:10.1051/0004-6361:20041520

Cited by 19 publications

(26 citation statements)

References 46 publications

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“…We also note that unlike the broken power-law distribution of cosmic background AGNs with a break at f X (0:5 2:0 keV ) ¼ 6 ; 10 À15 ergs s À1 cm À2 (e.g., Kim et al 2004b), the log (N )-log (S ) relation of normal galaxies is well reproduced by a single power law in a wide range of f X . This trend seems to continue to f X (0:5 2:0 keV) $ 10 À12 ergs s À1 cm À2 (Tajer et al 2005). Also plotted in Figure 8 are those previously determined with the CDF data in the S band and with the NHS data in the B band (Georgakakis et al 2004).…”

Section: Normal Galaxy Log (N )-Log (S ) Relationshipsupporting

confidence: 63%

ChandraMultiwavelength Project: Normal Galaxies at Intermediate Redshift

Kim

Barkhouse

Romero-Colmenero

et al. 2006

ApJ

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We have investigated 136 Chandra extragalactic sources, including 93 galaxies with narrow emission lines (NELGs) and 43 with only absorption lines (ALGs). Based on f X /f O , L X , X-ray spectral hardness, and optical emission-line diagnostics, we have conservatively classified 36 normal galaxies and 71 AGNs. Their redshift ranges from 0.01 to 1.2, with normal galaxies in the range z ¼ 0:01 0:3. Our normal galaxies appear to share characteristics with local galaxies, as expected from the X-ray binary populations and the hot interstellar matter (ISM ). In conjunction with normal galaxies found in other surveys, we found no statistically significant evolution in L X /L B , within the limited z range (P0.1). The best-fit slope of our log (N )-log (S ) relationship is À1.5 for both S (0.5-2 keV) and B (0.5-8 keV) energy bands, which is considerably steeper than that of the AGN-dominated cosmic background sources, but slightly flatter than the previous estimate, indicating that normal galaxies will not exceed the AGN population until f X (0:5 2:0 keV) $ 2 ; 10 À18 ergs s À1 cm À2 (a factor of $5 lower than the previous estimate). A group of NELGs appear to be heavily obscured in X-rays. After correcting for intrinsic absorption, their X-ray luminosities could be L X > 10 44 ergs s À1, making them type 2 quasar candidates. While most X-ray-luminous ALGs do not appear to be significantly absorbed, we found two heavily obscured objects that could be as luminous as an unobscured broad-line quasar. Among 43 ALGs, we found two E+A galaxy candidates. The X-ray spectra of both galaxies are soft, and one of them has a nearby close companion galaxy, supporting the merger/interaction scenario rather than the dusty starburst hypothesis.

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Section: Normal Galaxy Log (N )-Log (S ) Relationshipsupporting

confidence: 63%

ChandraMultiwavelength Project: Normal Galaxies at Intermediate Redshift

Kim

Barkhouse

Romero-Colmenero

et al. 2006

ApJ

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“…The sample is comprised of 8%, 11%, 63%, and 18% early-type, lenticular, spiral, and irregular galaxies, respectively, based on the optical morphologies provided in the NASA/IPAC Extragalactic Database (NED). This galaxy sample has no sources for which the optical luminosity is dominated by AGN emission, although one-third have signatures of Seyfert/LINER nuclei (Tajer et al 2005;Dale et al 2006;Moustakas et al 2010;Grier et al 2011). There are only a few galaxies that are undoubtedly interacting with neighboring galaxies, including NGC5194 (with NGC 5195), NGC1097 (with NGC 1097A), NGC1316 (with NGC 1317), and NGC3190 (with NGC 3187).…”

Section: Introductionmentioning

confidence: 99%

Updated 34-band Photometry for the SINGS/KINGFISH Samples of Nearby Galaxies

Dale

Cook

Roussel

et al. 2017

ApJ

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We present an update to the ultraviolet-to-radio database of global broadband photometry for the 79 nearby galaxies that comprise the union of the KINGFISH (Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel) and SINGS (Spitzer Infrared Nearby Galaxies Survey) samples. The 34-band data set presented here includes contributions from observational work carried out with a variety of facilities including GALEX, SDSS, Pan-STARRS1, NOAO, 2MASS, Wide-Field Infrared Survey Explorer, Spitzer, Herschel, Planck, JCMT, and the VLA. Improvements of note include recalibrations of previously published SINGS BVR C I C and KINGFISH farinfrared/submillimeter photometry. Similar to previous results in the literature, an excess of submillimeter emission above model predictions is seen primarily for low-metallicity dwarf or irregular galaxies. This 33-band photometric data set for the combined KINGFISH+SINGS sample serves as an important multiwavelength reference for the variety of galaxies observed at low redshift. A thorough analysis of the observed spectral energy distributions is carried out in a companion paper.

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“…Searches for normal galaxies in broad (e.g. Georgakakis et al 2003Georgakakis et al , 2004Georgakakis et al , 2006Hornschemeier et al 2005;Tajer et al 2005;Tzanavaris et al 2006) and deep (e.g. Alexander et al 2002;Hornschemeier et al 2003;Norman et al 2004;Georgakakis et al 2007) surveys have provided a large number of X-ray selected galaxies.…”

Section: Introductionmentioning

confidence: 99%

Normal galaxies in the XMM-Newton fields

Rovilos

Georgantopoulos

Tzanavaris

et al. 2009

A&A

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Context. We use the first XMM serendipitous source catalogue (1XMM) to compile a sample of normal X-ray galaxies. Aims. We seek to expand the database of X-ray selected normal galaxies at intermediate redshifts and examine the relation between X-ray emission and star formation for late-type systems. Methods. The candidates are selected based on their X-ray (soft spectra), X-ray to optical (log( f x / f o ) < −2) and optical (extended sources) properties. 44 candidates are found and 35 are spectroscopically observed with the Australian National University's 2.3 m telescope to examine their nature. Results. Of the 35 sources observed, 2 are AGN, 11 emission line galaxies, 12 absorption line galaxies, 6 have featureless spectra while 4 are associated with Galactic stars. We combine our emission line sample with earlier works forming the most comprehensive X-ray selected galaxy sample for the study of the X-ray luminosity to the Hα luminosity -a well-calibrated star-formation indicator -relation. Conclusions. We find that the X-ray luminosity strongly correlates with the Hα luminosity, suggesting that the X-rays efficiently trace the star-formation.

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A sample of X-ray emitting normal galaxies from the BMW–HRI Catalogue

Cited by 19 publications

References 46 publications

ChandraMultiwavelength Project: Normal Galaxies at Intermediate Redshift

ChandraMultiwavelength Project: Normal Galaxies at Intermediate Redshift

Updated 34-band Photometry for the SINGS/KINGFISH Samples of Nearby Galaxies

Normal galaxies in the XMM-Newton fields

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