Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes

I. Gavignaud; L. Wisotzki; A. Bongiorno; S. Paltani; G. Zamorani; P. Møller; V. Le Brun; B. Husemann; F. Lamareille; M. Schramm; O. Le Fèvre; D. Bottini; B. Garilli; D. MacCagni; R. Scaramella; M. Scodeggio; L. Tresse; G. Vettolani; A. Zanichelli; C. Adami; M. Arnaboldi; S. Arnouts; S. Bardelli; M. Bolzonella; A. Cappi; S. Charlot; P. Ciliegi; T. Contini; S. Foucaud; P. Franzetti; L. Guzzo; O. Ilbert; A. Iovino; H. J. McCracken; B. Marano; C. Marinoni; A. Mazure; B. Meneux; R. Merighi; R. Pellò; A. Pollo; L. Pozzetti; M. Radovich; E. Zucca; M. Bondi; G. Busarello; O. Cucciati; S. De La Torre; L. Gregorini; Y. Mellier; P. Merluzzi; V. Ripepi; D. Rizzo; D. Vergani

doi:10.1051/0004-6361:20078957

Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes

I. Gavignaud, L. Wisotzki, A. Bongiorno, S. Paltani, G. Zamorani, P. Møller, V. Le Brun, B. Husemann, F. Lamareille, M. Schramm, O. Le Fèvre, D. Bottini, B. Garilli, D. MacCagni, R. Scaramella, M. Scodeggio, L. Tresse, G. Vettolani, A. Zanichelli, C. AdamiM. Arnaboldi, S. Arnouts, S. Bardelli, M. Bolzonella, A. Cappi, S. Charlot, P. Ciliegi, T. Contini, S. Foucaud, P. Franzetti, L. Guzzo, O. Ilbert, A. Iovino, H. J. McCracken, B. Marano, C. Marinoni, A. Mazure, B. Meneux, R. Merighi, R. Pellò, A. Pollo, L. Pozzetti, M. Radovich, E. Zucca, M. Bondi, G. Busarello, O. Cucciati, S. De La Torre, L. Gregorini, Y. Mellier, P. Merluzzi, V. Ripepi, D. Rizzo, D. Vergani

Facultad Ciencias Exactas

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38 Citas (Scopus)

Resumen

We use one of the deepest spectroscopic samples of broad-line active galactic nuclei (AGN) currently available, extracted from the VIMOS VLT Deep Survey (VVDS), to compute the Mg II and C IV virial-mass estimates of 120 super-massive black holes in the redshift range 1.0 < z < 1.9 and 2.6 < z < 4.3. We find that the mass-luminosity relation shows considerably enhanced dispersion towards low AGN luminosities (log L_bol ∼ 45). At these luminosities, there is a substantial fraction of black holes accreting far below their Eddington limit (L_bol / L_Edd < 0.1), in marked contrast to what is generally found for AGN of higher luminosities. We speculate that these may be AGN on the decaying branch of their lightcurves, well past their peak activity. This would agree with recent theoretical predictions of AGN evolution. In the electronic Appendix of this paper we publish an update of the VVDS type-1 AGN sample, including the first and most of the second-epoch observations. This sample contains 298 objects of which 168 are new.

Idioma original	Inglés
Páginas (desde-hasta)	637-650
Número de páginas	14
Publicación	Astronomy and Astrophysics
Volumen	492
N.º	3
DOI	https://doi.org/10.1051/0004-6361:20078957
Estado	Publicada - dic. 2008

Áreas temáticas de ASJC Scopus

Astronomía y astrofísica
Ciencias planetarias y espacial

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10.1051/0004-6361:20078957

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Gavignaud, I., Wisotzki, L., Bongiorno, A., Paltani, S., Zamorani, G., Møller, P., Le Brun, V., Husemann, B., Lamareille, F., Schramm, M., Le Fèvre, O., Bottini, D., Garilli, B., MacCagni, D., Scaramella, R., Scodeggio, M., Tresse, L., Vettolani, G., Zanichelli, A., ... Vergani, D. (2008). Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes. Astronomy and Astrophysics, 492(3), 637-650. https://doi.org/10.1051/0004-6361:20078957

@article{87334fd9158247b9b40498ac49be47f2,

title = "Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes",

abstract = "We use one of the deepest spectroscopic samples of broad-line active galactic nuclei (AGN) currently available, extracted from the VIMOS VLT Deep Survey (VVDS), to compute the Mg II and C IV virial-mass estimates of 120 super-massive black holes in the redshift range 1.0 < z < 1.9 and 2.6 < z < 4.3. We find that the mass-luminosity relation shows considerably enhanced dispersion towards low AGN luminosities (log Lbol ∼ 45). At these luminosities, there is a substantial fraction of black holes accreting far below their Eddington limit (Lbol / LEdd < 0.1), in marked contrast to what is generally found for AGN of higher luminosities. We speculate that these may be AGN on the decaying branch of their lightcurves, well past their peak activity. This would agree with recent theoretical predictions of AGN evolution. In the electronic Appendix of this paper we publish an update of the VVDS type-1 AGN sample, including the first and most of the second-epoch observations. This sample contains 298 objects of which 168 are new.",

keywords = "Galaxies: Seyfert, Galaxies: active, Galaxies: nuclei",

author = "I. Gavignaud and L. Wisotzki and A. Bongiorno and S. Paltani and G. Zamorani and P. M{\o}ller and {Le Brun}, V. and B. Husemann and F. Lamareille and M. Schramm and {Le F{\`e}vre}, O. and D. Bottini and B. Garilli and D. MacCagni and R. Scaramella and M. Scodeggio and L. Tresse and G. Vettolani and A. Zanichelli and C. Adami and M. Arnaboldi and S. Arnouts and S. Bardelli and M. Bolzonella and A. Cappi and S. Charlot and P. Ciliegi and T. Contini and S. Foucaud and P. Franzetti and L. Guzzo and O. Ilbert and A. Iovino and McCracken, {H. J.} and B. Marano and C. Marinoni and A. Mazure and B. Meneux and R. Merighi and R. Pell{\`o} and A. Pollo and L. Pozzetti and M. Radovich and E. Zucca and M. Bondi and G. Busarello and O. Cucciati and {De La Torre}, S. and L. Gregorini and Y. Mellier and P. Merluzzi and V. Ripepi and D. Rizzo and D. Vergani",

year = "2008",

month = dec,

doi = "10.1051/0004-6361:20078957",

language = "English",

volume = "492",

pages = "637--650",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "3",

}

Gavignaud, I, Wisotzki, L, Bongiorno, A, Paltani, S, Zamorani, G, Møller, P, Le Brun, V, Husemann, B, Lamareille, F, Schramm, M, Le Fèvre, O, Bottini, D, Garilli, B, MacCagni, D, Scaramella, R, Scodeggio, M, Tresse, L, Vettolani, G, Zanichelli, A, Adami, C, Arnaboldi, M, Arnouts, S, Bardelli, S, Bolzonella, M, Cappi, A, Charlot, S, Ciliegi, P, Contini, T, Foucaud, S, Franzetti, P, Guzzo, L, Ilbert, O, Iovino, A, McCracken, HJ, Marano, B, Marinoni, C, Mazure, A, Meneux, B, Merighi, R, Pellò, R, Pollo, A, Pozzetti, L, Radovich, M, Zucca, E, Bondi, M, Busarello, G, Cucciati, O, De La Torre, S, Gregorini, L, Mellier, Y, Merluzzi, P, Ripepi, V, Rizzo, D & Vergani, D 2008, 'Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes', Astronomy and Astrophysics, vol. 492, n.º 3, pp. 637-650. https://doi.org/10.1051/0004-6361:20078957

TY - JOUR

T1 - Eddington ratios of faint AGN at intermediate redshift

T2 - Evidence for a population of half-starved black holes

AU - Gavignaud, I.

AU - Wisotzki, L.

AU - Bongiorno, A.

AU - Paltani, S.

AU - Zamorani, G.

AU - Møller, P.

AU - Le Brun, V.

AU - Husemann, B.

AU - Lamareille, F.

AU - Schramm, M.

AU - Le Fèvre, O.

AU - Bottini, D.

AU - Garilli, B.

AU - MacCagni, D.

AU - Scaramella, R.

AU - Scodeggio, M.

AU - Tresse, L.

AU - Vettolani, G.

AU - Zanichelli, A.

AU - Adami, C.

AU - Arnaboldi, M.

AU - Arnouts, S.

AU - Bardelli, S.

AU - Bolzonella, M.

AU - Cappi, A.

AU - Charlot, S.

AU - Ciliegi, P.

AU - Contini, T.

AU - Foucaud, S.

AU - Franzetti, P.

AU - Guzzo, L.

AU - Ilbert, O.

AU - Iovino, A.

AU - McCracken, H. J.

AU - Marano, B.

AU - Marinoni, C.

AU - Mazure, A.

AU - Meneux, B.

AU - Merighi, R.

AU - Pellò, R.

AU - Pollo, A.

AU - Pozzetti, L.

AU - Radovich, M.

AU - Zucca, E.

AU - Bondi, M.

AU - Busarello, G.

AU - Cucciati, O.

AU - De La Torre, S.

AU - Gregorini, L.

AU - Mellier, Y.

AU - Merluzzi, P.

AU - Ripepi, V.

AU - Rizzo, D.

AU - Vergani, D.

PY - 2008/12

Y1 - 2008/12

N2 - We use one of the deepest spectroscopic samples of broad-line active galactic nuclei (AGN) currently available, extracted from the VIMOS VLT Deep Survey (VVDS), to compute the Mg II and C IV virial-mass estimates of 120 super-massive black holes in the redshift range 1.0 < z < 1.9 and 2.6 < z < 4.3. We find that the mass-luminosity relation shows considerably enhanced dispersion towards low AGN luminosities (log Lbol ∼ 45). At these luminosities, there is a substantial fraction of black holes accreting far below their Eddington limit (Lbol / LEdd < 0.1), in marked contrast to what is generally found for AGN of higher luminosities. We speculate that these may be AGN on the decaying branch of their lightcurves, well past their peak activity. This would agree with recent theoretical predictions of AGN evolution. In the electronic Appendix of this paper we publish an update of the VVDS type-1 AGN sample, including the first and most of the second-epoch observations. This sample contains 298 objects of which 168 are new.

AB - We use one of the deepest spectroscopic samples of broad-line active galactic nuclei (AGN) currently available, extracted from the VIMOS VLT Deep Survey (VVDS), to compute the Mg II and C IV virial-mass estimates of 120 super-massive black holes in the redshift range 1.0 < z < 1.9 and 2.6 < z < 4.3. We find that the mass-luminosity relation shows considerably enhanced dispersion towards low AGN luminosities (log Lbol ∼ 45). At these luminosities, there is a substantial fraction of black holes accreting far below their Eddington limit (Lbol / LEdd < 0.1), in marked contrast to what is generally found for AGN of higher luminosities. We speculate that these may be AGN on the decaying branch of their lightcurves, well past their peak activity. This would agree with recent theoretical predictions of AGN evolution. In the electronic Appendix of this paper we publish an update of the VVDS type-1 AGN sample, including the first and most of the second-epoch observations. This sample contains 298 objects of which 168 are new.

KW - Galaxies: Seyfert

KW - Galaxies: active

KW - Galaxies: nuclei

UR - http://www.scopus.com/inward/record.url?scp=57649200149&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20078957

DO - 10.1051/0004-6361:20078957

M3 - Article

AN - SCOPUS:57649200149

SN - 0004-6361

VL - 492

SP - 637

EP - 650

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

Eddington ratios of faint AGN at intermediate redshift: Evidence for a population of half-starved black holes

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