Arp 299: A Second Merging System with Two Active Nuclei?

Ballo, L.; Braito, V.; Ceca, R. Della; Maraschi, L.; Tavecchio, F.; Dadina, M.

doi:10.1086/379887

Cited by 148 publications

(181 citation statements)

References 24 publications

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“…Fe K features are found at 6.4 keV (line emission from cold Fe) and/or at higher energies (Fe xxv or Fe xxvi). The detection of these Fe K lines have been reported previously, based on XMM-Newton, ASCA, and Chandra observations (Imanishi et al 2003;Xia et al 2002;Armus et al 2009;Komossa et al 2003;Della ceca et al 2002;Ballo et al 2004;Clements et al 2002;Iwasawa & Comastri 1998;Turner & Kraemer 2003;Braito et al 2004). One addition is F17207-0014 for which a possible highionization Fe K line is detected (2σ) for the first time.…”

Section: Prominent Emission Linessupporting

confidence: 68%

“…A subsequent XMM-Newton observation resolved the two nuclei and found that the spectra of both nuclei show Fe lines but at different energies -at 6.4 keV in NGC 3690 W and at 6.7 keV in NGC 3690 E (Ballo et al 2004). The Chandra data alone provide detection of these lines at the 2σ level.…”

Section: Discussionmentioning

confidence: 99%

“…NGC 6240 - Iwasawa & Comastri 1998;Vignati et al 1999;Ikebe et al 2000;Komossa et al 2003;NGC 3690 West -Della Ceca et al 2002;Ballo et al 2004;VV 340a -Armus et al 2009;UGC 5101 -Imanishi et al 2003). Note that highionization Fe K lines from Fe xxv or Fe xxvi at 6.7-7 keV that have been found in a few objects, (e.g., NGC 3690 East - Ballo et al 2004;Arp 220 -Iwasawa et al 2005), are not considered here as evidence for AGN since they can also originate from hot gas produced by a starburst.…”

Section: X-ray Colour and Agn Selectionmentioning

confidence: 98%

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C-GOALS:Chandraobservations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

Iwasawa

Sanders²,

Teng

et al. 2011

A&A

156

271

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We present X-ray data for a complete sample of 44 luminous infrared galaxies (LIRGs), obtained with the Chandra X-ray Observatory. These are the X-ray observations of the high luminosity portion of the Great Observatory All-sky LIRG Survey (GOALS), which includes the most luminous infrared selected galaxies, log (L ir /L ) ≥ 11.73, in the local universe, z ≤ 0.088. X-rays were detected from 43 out of 44 objects, and their arcsec-resolution images, spectra, and radial brightness distributions are presented. With a selection by hard X-ray colour and the 6.4 keV iron line, AGN are found in 37% of the objects, with higher luminosity sources more likely to contain an AGN. These AGN also tend to be found in late-stage mergers. The AGN fraction would increase to 48% if objects with [Ne v]λ14.3 μm detection are included. Double AGN are clearly detected only in NGC 6240 among 24 double/triple systems. Other AGN are found either in single nucleus objects or in one of the double nuclei at similar rates. Objects without conventional X-ray signatures of AGN appear to be hard X-ray quiet, relative to the X-ray to far-IR correlation for starburst galaxies, as discussed elsewhere. Most objects also show extended soft X-ray emission, which is likely related to an outflow from the nuclear region, with a metal abundance pattern suggesting enrichment by core collapse supernovae, as expected for a starburst.

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Section: Prominent Emission Linessupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

Section: X-ray Colour and Agn Selectionmentioning

confidence: 98%

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C-GOALS:Chandraobservations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

Iwasawa

Sanders²,

Teng

et al. 2011

A&A

156

271

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“…Sargent & Scoville 1991;Lonsdale et al 1992). From a comparison between the X-ray luminosity of A and B1, Ballo et al (2004) deduce that both IC 694 and NGC 3690 host AGN activity. According to them, such X-ray intensity could not be accounted for by star formation alone.…”

Section: Ic 694mentioning

confidence: 88%

New H₂O masers in Seyfert and FIR bright galaxies

Tarchi

Castangia

Henkel

et al. 2010

A&A

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Context. Very luminous extragalactic water masers, the megamasers, are associated with active galactic nuclei (AGN) in galaxies characterized by accretion disks, radio jets, and nuclear outflows. Weaker masers, the kilomasers, seem to be related mostly to star formation activity, although the possibility exists that some of these sources may belong to the weak tail of the AGN maser distribution. Aims. It is particularly important to accurately locate the water maser emission to reveal its origin and shed light on extragalactic starforming activity or to elucidate the highly obscured central regions of galaxies. Methods. We performed interferometric observations of three galaxies, NGC 3556, Arp 299, and NGC 4151, where water emission was found. Statistical tools were used to study the relation between OH and H 2 O maser emission in galaxies. Results. The maser in NGC 3556 is associated with a compact radio continuum source that is most likely a supernova remnant or radio supernova. In Arp 299, the luminous water maser has been decomposed in three main emitting regions associated with the nuclear regions of the two main galaxies of the system, NGC 3690 and IC 694, and the region of overlap. In NGC 4151, only one of the two previously observed maser components has been tentatively detected. This feature, if real, is associated with the galaxy's central region. The only galaxy, so far, where luminous maser emission from two maser species, OH and H 2 O, has been confidently detected is Arp 299. Weaker masers from these two species instead coexist in a number of objects. A search for emission from both maser species in a larger number of galaxies is, however, needed to assess these last two results better.

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“…Direct X-ray imaging of active nuclei have revealed several SMBH binaries at separations of ∼3 kpc (Komossa et al 2003;Ballo et al 2004;Bianchi et al 2008;Civano et al 2012), 400 pc (Paggi et al 2013), and 150 pc (Fabbiano et al 2011). Additional evidence comes in the form of a radio galaxy with a double core with a projected separation of 10 pc (Rodriguez et al 2006), and several other observations of radio galaxies, such as the wiggled shape of jets indicating precession (Roos et al 1993), the X-shaped morphologies of radio lobes (Merritt and Ekers 2002;Liu 2004), the interruption and recurrence of activity in double-double radio galaxies (Schoenmakers et al 2000;Liu et al 2003), and the elliptical motion of the unresolved core of 3C66B (Sudou et al 2003), which have all been interpreted as indirect evidence for SMBH binaries down to subparsec scales.…”

Section: Circumbinary Smbh Disksmentioning

confidence: 99%

Menus for Feeding Black Holes

Kocsis¹,

Loeb²

2013

The Physics of Accretion Onto Black Holes

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Black holes are the ultimate prisons of the Universe, regions of spacetime where the enormous gravity prohibits matter or even light to escape to infinity. Yet, matter falling toward the black holes may shine spectacularly, generating the strongest source of radiation. These sources provide us with astrophysical laboratories of extreme physical conditions that cannot be realized on Earth. This chapter offers a review of the basic menus for feeding matter onto black holes and discusses their observational implications.Keywords Black holes · black hole binaries · Accretion and accretion disks · Plasmas -astrophysical PACS 04.70.Bw · 04.25.dg · 97.60.Lf · 98.62.Mw · 95.30.Qd

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Arp 299: A Second Merging System with Two Active Nuclei?

Cited by 148 publications

References 24 publications

C-GOALS:Chandraobservations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

C-GOALS:Chandraobservations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

New H₂O masers in Seyfert and FIR bright galaxies

Menus for Feeding Black Holes

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Arp 299: A Second Merging System with Two Active Nuclei?

Cited by 148 publications

References 24 publications

C-GOALS:Chandraobservations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

C-GOALS:Chandraobservations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

New H2O masers in Seyfert and FIR bright galaxies

Menus for Feeding Black Holes

Contact Info

Product

Resources

About

New H₂O masers in Seyfert and FIR bright galaxies