The environments of active galactic nuclei within the zcosmos density field

J. D. Silverman, K. Kovac, C. Knobel, S. Lilly, M. Bolzonella, F. Lamareille, V. Mainieri, M. Brusa, Nico Cappelluti, Y. Peng, G. Hasinger, G. Zamorani, M. Scodeggio, T. Contini, C. M. Carollo, K. Jahnke, J. P. Kneib, O. Le Fevre, S. Bardelli, A. BongiornoH. Brunner, K. Caputi, F. Civano, A. Comastri, G. Coppa, O. Cucciati, S. De La Torre, L. De Ravel, M. Elvis, A. Finoguenov, F. Fiore, P. Franzetti, B. Garilli, R. Gilli, R. Griffiths, A. Iovino, P. Kampczyk, A. Koekemoer, J. F. Le Borgne, V. Le Brun, C. Maier, M. Mignoli, R. Pello, E. Perez Montero, E. Ricciardellil, M. Tanaka, L. Tasca, L. Tresse, D. Vergani, C. Vignali, E. Zucca, D. Bottini, A. Cappi, P. Cassata, C. Marinoni, H. J. McCracken, P. Memeo, B. Meneux, P. Oesch, C. Porciani, M. Salvato

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

The impact of environment on active galactic nucleus (AGN) activity up to z ∼ 1 is assessed by utilizing a mass-selected sample of galaxies from the 10k catalog of the zCOSMOS spectroscopic redshift survey.We identify 147 AGN by their X-ray emission as detected by XMM-Newton from a parent sample of 7234 galaxies.We measure the fraction of galaxies with stellar mass M > 2.51010 M that host an AGN as a function of local overdensity using the 5th, 10th, and 20th nearest neighbors that cover a range of physical scales (∼ 1-4 Mpc). Overall, we find that AGNs prefer to reside in environments equivalent to massive galaxies with substantial levels of star formation. Specifically, AGNs with host masses between 0.25 and 11011 M span the full range of environments (i.e., field to group) exhibited by galaxies of the same mass and rest-frame color or specific star formation rate. Host galaxies havingM > 1011 M clearly illustrate the association with star formation since they are predominantly bluer than the underlying galaxy population and exhibit a preference for lower-density regions analogous to Sloan Digital Sky Survey studies of narrow-line AGN. To probe the environment on smaller physical scales, we determine the fraction of galaxies (M > 2.51010 M) hosting AGNs inside optically selected groups, and find no significant difference with field galaxies. We interpret our results as evidence that AGN activity requires a sufficient fuel supply; the probability of a massive galaxy to have retained some sufficient amount of gas, as evidence by its ongoing star formation, is higher in underdense regions where disruptive processes (i.e., galaxy harassment, tidal stripping) are lessened.

Original languageEnglish (US)
Pages (from-to)171-182
Number of pages12
JournalAstrophysical Journal
Volume695
Issue number1
DOIs
StatePublished - Apr 10 2009
Externally publishedYes

Fingerprint

active galactic nuclei
galaxies
star formation
probe
gas
XMM-Newton telescope
star formation rate
stripping
stellar mass
newton
catalogs
color
probes

Keywords

  • Galaxies: active
  • Quasars: general
  • X-rays: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Silverman, J. D., Kovac, K., Knobel, C., Lilly, S., Bolzonella, M., Lamareille, F., ... Salvato, M. (2009). The environments of active galactic nuclei within the zcosmos density field. Astrophysical Journal, 695(1), 171-182. https://doi.org/10.1088/0004-637X/695/1/171

The environments of active galactic nuclei within the zcosmos density field. / Silverman, J. D.; Kovac, K.; Knobel, C.; Lilly, S.; Bolzonella, M.; Lamareille, F.; Mainieri, V.; Brusa, M.; Cappelluti, Nico; Peng, Y.; Hasinger, G.; Zamorani, G.; Scodeggio, M.; Contini, T.; Carollo, C. M.; Jahnke, K.; Kneib, J. P.; Le Fevre, O.; Bardelli, S.; Bongiorno, A.; Brunner, H.; Caputi, K.; Civano, F.; Comastri, A.; Coppa, G.; Cucciati, O.; De La Torre, S.; De Ravel, L.; Elvis, M.; Finoguenov, A.; Fiore, F.; Franzetti, P.; Garilli, B.; Gilli, R.; Griffiths, R.; Iovino, A.; Kampczyk, P.; Koekemoer, A.; Le Borgne, J. F.; Le Brun, V.; Maier, C.; Mignoli, M.; Pello, R.; Perez Montero, E.; Ricciardellil, E.; Tanaka, M.; Tasca, L.; Tresse, L.; Vergani, D.; Vignali, C.; Zucca, E.; Bottini, D.; Cappi, A.; Cassata, P.; Marinoni, C.; McCracken, H. J.; Memeo, P.; Meneux, B.; Oesch, P.; Porciani, C.; Salvato, M.

In: Astrophysical Journal, Vol. 695, No. 1, 10.04.2009, p. 171-182.

Research output: Contribution to journalArticle

Silverman, JD, Kovac, K, Knobel, C, Lilly, S, Bolzonella, M, Lamareille, F, Mainieri, V, Brusa, M, Cappelluti, N, Peng, Y, Hasinger, G, Zamorani, G, Scodeggio, M, Contini, T, Carollo, CM, Jahnke, K, Kneib, JP, Le Fevre, O, Bardelli, S, Bongiorno, A, Brunner, H, Caputi, K, Civano, F, Comastri, A, Coppa, G, Cucciati, O, De La Torre, S, De Ravel, L, Elvis, M, Finoguenov, A, Fiore, F, Franzetti, P, Garilli, B, Gilli, R, Griffiths, R, Iovino, A, Kampczyk, P, Koekemoer, A, Le Borgne, JF, Le Brun, V, Maier, C, Mignoli, M, Pello, R, Perez Montero, E, Ricciardellil, E, Tanaka, M, Tasca, L, Tresse, L, Vergani, D, Vignali, C, Zucca, E, Bottini, D, Cappi, A, Cassata, P, Marinoni, C, McCracken, HJ, Memeo, P, Meneux, B, Oesch, P, Porciani, C & Salvato, M 2009, 'The environments of active galactic nuclei within the zcosmos density field', Astrophysical Journal, vol. 695, no. 1, pp. 171-182. https://doi.org/10.1088/0004-637X/695/1/171
Silverman JD, Kovac K, Knobel C, Lilly S, Bolzonella M, Lamareille F et al. The environments of active galactic nuclei within the zcosmos density field. Astrophysical Journal. 2009 Apr 10;695(1):171-182. https://doi.org/10.1088/0004-637X/695/1/171
Silverman, J. D. ; Kovac, K. ; Knobel, C. ; Lilly, S. ; Bolzonella, M. ; Lamareille, F. ; Mainieri, V. ; Brusa, M. ; Cappelluti, Nico ; Peng, Y. ; Hasinger, G. ; Zamorani, G. ; Scodeggio, M. ; Contini, T. ; Carollo, C. M. ; Jahnke, K. ; Kneib, J. P. ; Le Fevre, O. ; Bardelli, S. ; Bongiorno, A. ; Brunner, H. ; Caputi, K. ; Civano, F. ; Comastri, A. ; Coppa, G. ; Cucciati, O. ; De La Torre, S. ; De Ravel, L. ; Elvis, M. ; Finoguenov, A. ; Fiore, F. ; Franzetti, P. ; Garilli, B. ; Gilli, R. ; Griffiths, R. ; Iovino, A. ; Kampczyk, P. ; Koekemoer, A. ; Le Borgne, J. F. ; Le Brun, V. ; Maier, C. ; Mignoli, M. ; Pello, R. ; Perez Montero, E. ; Ricciardellil, E. ; Tanaka, M. ; Tasca, L. ; Tresse, L. ; Vergani, D. ; Vignali, C. ; Zucca, E. ; Bottini, D. ; Cappi, A. ; Cassata, P. ; Marinoni, C. ; McCracken, H. J. ; Memeo, P. ; Meneux, B. ; Oesch, P. ; Porciani, C. ; Salvato, M. / The environments of active galactic nuclei within the zcosmos density field. In: Astrophysical Journal. 2009 ; Vol. 695, No. 1. pp. 171-182.
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abstract = "The impact of environment on active galactic nucleus (AGN) activity up to z ∼ 1 is assessed by utilizing a mass-selected sample of galaxies from the 10k catalog of the zCOSMOS spectroscopic redshift survey.We identify 147 AGN by their X-ray emission as detected by XMM-Newton from a parent sample of 7234 galaxies.We measure the fraction of galaxies with stellar mass M > 2.51010 M that host an AGN as a function of local overdensity using the 5th, 10th, and 20th nearest neighbors that cover a range of physical scales (∼ 1-4 Mpc). Overall, we find that AGNs prefer to reside in environments equivalent to massive galaxies with substantial levels of star formation. Specifically, AGNs with host masses between 0.25 and 11011 M span the full range of environments (i.e., field to group) exhibited by galaxies of the same mass and rest-frame color or specific star formation rate. Host galaxies havingM > 1011 M clearly illustrate the association with star formation since they are predominantly bluer than the underlying galaxy population and exhibit a preference for lower-density regions analogous to Sloan Digital Sky Survey studies of narrow-line AGN. To probe the environment on smaller physical scales, we determine the fraction of galaxies (M > 2.51010 M) hosting AGNs inside optically selected groups, and find no significant difference with field galaxies. We interpret our results as evidence that AGN activity requires a sufficient fuel supply; the probability of a massive galaxy to have retained some sufficient amount of gas, as evidence by its ongoing star formation, is higher in underdense regions where disruptive processes (i.e., galaxy harassment, tidal stripping) are lessened.",
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T1 - The environments of active galactic nuclei within the zcosmos density field

AU - Silverman, J. D.

AU - Kovac, K.

AU - Knobel, C.

AU - Lilly, S.

AU - Bolzonella, M.

AU - Lamareille, F.

AU - Mainieri, V.

AU - Brusa, M.

AU - Cappelluti, Nico

AU - Peng, Y.

AU - Hasinger, G.

AU - Zamorani, G.

AU - Scodeggio, M.

AU - Contini, T.

AU - Carollo, C. M.

AU - Jahnke, K.

AU - Kneib, J. P.

AU - Le Fevre, O.

AU - Bardelli, S.

AU - Bongiorno, A.

AU - Brunner, H.

AU - Caputi, K.

AU - Civano, F.

AU - Comastri, A.

AU - Coppa, G.

AU - Cucciati, O.

AU - De La Torre, S.

AU - De Ravel, L.

AU - Elvis, M.

AU - Finoguenov, A.

AU - Fiore, F.

AU - Franzetti, P.

AU - Garilli, B.

AU - Gilli, R.

AU - Griffiths, R.

AU - Iovino, A.

AU - Kampczyk, P.

AU - Koekemoer, A.

AU - Le Borgne, J. F.

AU - Le Brun, V.

AU - Maier, C.

AU - Mignoli, M.

AU - Pello, R.

AU - Perez Montero, E.

AU - Ricciardellil, E.

AU - Tanaka, M.

AU - Tasca, L.

AU - Tresse, L.

AU - Vergani, D.

AU - Vignali, C.

AU - Zucca, E.

AU - Bottini, D.

AU - Cappi, A.

AU - Cassata, P.

AU - Marinoni, C.

AU - McCracken, H. J.

AU - Memeo, P.

AU - Meneux, B.

AU - Oesch, P.

AU - Porciani, C.

AU - Salvato, M.

PY - 2009/4/10

Y1 - 2009/4/10

N2 - The impact of environment on active galactic nucleus (AGN) activity up to z ∼ 1 is assessed by utilizing a mass-selected sample of galaxies from the 10k catalog of the zCOSMOS spectroscopic redshift survey.We identify 147 AGN by their X-ray emission as detected by XMM-Newton from a parent sample of 7234 galaxies.We measure the fraction of galaxies with stellar mass M > 2.51010 M that host an AGN as a function of local overdensity using the 5th, 10th, and 20th nearest neighbors that cover a range of physical scales (∼ 1-4 Mpc). Overall, we find that AGNs prefer to reside in environments equivalent to massive galaxies with substantial levels of star formation. Specifically, AGNs with host masses between 0.25 and 11011 M span the full range of environments (i.e., field to group) exhibited by galaxies of the same mass and rest-frame color or specific star formation rate. Host galaxies havingM > 1011 M clearly illustrate the association with star formation since they are predominantly bluer than the underlying galaxy population and exhibit a preference for lower-density regions analogous to Sloan Digital Sky Survey studies of narrow-line AGN. To probe the environment on smaller physical scales, we determine the fraction of galaxies (M > 2.51010 M) hosting AGNs inside optically selected groups, and find no significant difference with field galaxies. We interpret our results as evidence that AGN activity requires a sufficient fuel supply; the probability of a massive galaxy to have retained some sufficient amount of gas, as evidence by its ongoing star formation, is higher in underdense regions where disruptive processes (i.e., galaxy harassment, tidal stripping) are lessened.

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KW - Galaxies: active

KW - Quasars: general

KW - X-rays: galaxies

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