PROBING THE FAINT END OF THE QUASAR LUMINOSITY FUNCTION AT z ∼ 4 IN THE COSMOS FIELD

被引：48

作者：

Ikeda, H. ^{[1
]}

Nagao, T. ^{[1
,2
]}

Matsuoka, K. ^{[1
]}

Taniguchi, Y. ^{[2
]}

Shioya, Y. ^{[2
]}

Trump, J. R. ^{[3
]}

Capak, P. ^{[4
,5
]}

Comastri, A. ^{[6
]}

Enoki, M. ^{[7
]}

Ideue, Y. ^{[1
]}

Kakazu, Y. ^{[4
]}

Koekemoer, A. M. ^{[8
]}

Morokuma, T. ^{[9
]}

Murayama, T. ^{[10
]}

Saito, T. ^{[12
]}

Salvato, M. ^{[11
]}

Schinnerer, E. ^{[13
]}

Scoville, N. Z. ^{[4
]}

Silverman, J. D. ^{[12
]}

机构：

[1] Ehime Univ, Grad Sch Sci & Engn, Matsuyama, Ehime 7908577, Japan

[2] Ehime Univ, Res Ctr Space & Cosm Evolut, Matsuyama, Ehime 7908577, Japan

[3] Univ Calif Santa Cruz, UCO Lick Observ, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[4] CALTECH, Pasadena, CA 91125 USA

[5] Spitzer Sci Ctr, Pasadena, CA 91125 USA

[6] INAF Osservatorio Astron Bologna, I-40127 Bologna, Italy

[7] Tokyo Keizai Univ, Fac Business Adm, Tokyo 1858502, Japan

[8] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[9] Univ Tokyo, Inst Astron, Grad Sch Sci, Mitaka, Tokyo 1810015, Japan

[10] Tohoku Univ, Astron Inst, Grad Sch Sci, Sendai, Miyagi 9808578, Japan

[11] Max Planck Inst Plasma Phys, D-85741 Garching, Germany

[12] Univ Tokyo, IPMU, Kashiwa, Chiba 2778582, Japan

[13] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 728卷 / 02期

基金：

日本学术振兴会;

关键词：

cosmology: observations; quasars: general; surveys; DIGITAL-SKY-SURVEY; EVOLUTION SURVEY COSMOS; QSO REDSHIFT SURVEY; STELLAR OBJECTS; Z-GREATER-THAN-5.7; QUASARS; ADDITIONAL QUASARS; SUBARU TELESCOPE; DEEP SURVEY; DISCOVERY; SPACE;

D O I：

10.1088/2041-8205/728/2/L25

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We searched for quasars that are similar to 3 mag fainter than the SDSS quasars in the redshift range 3.7 less than or similar to z less than or similar to 4.7 in the COSMOS field to constrain the faint end of the quasar luminosity function (QLF). Using optical photometric data, we selected 31 quasar candidates with 22 < i' < 24 at z similar to 4. We obtained optical spectra for most of these candidates using FOCAS on the Subaru telescope and identified eight low-luminosity quasars at z similar to 4. In order to derive the QLF based on our spectroscopic follow-up campaign, we estimated the photometric completeness of our quasar survey through detailed Monte Carlo simulations. Our QLF at z similar to 4 has a much shallower faint-end slope (beta = -1.67(-0.17)(+ 0.11)) than that obtained by other recent surveys in the same redshift. Our result is consistent with the scenario of downsizing evolution of active galactic nuclei inferred by recent optical and X-ray quasar surveys at lower redshifts.

引用

页数：5

共 41 条

[1] [Anonymous], 2019, ASTROPHYS J
[2] SExtractor: Software for source extraction
Bertin, E
Arnouts, S
[J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 117 (02): : 393 - 404
[3] The VVDS type-1 AGN sample:: the faint end of the luminosity function
Bongiorno, A.
Zamorani, G.
Gavignaud, I.
Marano, B.
Paltani, S.
Mathez, G.
Moller, P.
Picat, J. P.
Cirasuolo, M.
Lamareille, F.
Bottini, D.
Garilli, B.
Le Brun, V.
Le Fevre, O.
Maccagni, D.
Scaramella, R.
Scodeggio, M.
Tresse, L.
Vettolani, G.
Zanichelli, A.
Adami, C.
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, H. J.
Marinoni, C.
Mazure, A.
Meneux, B.
Merighi, R.
Pello, R.
Pollo, A.
Pozzetti, L.
Radovich, M.
Zucca, E.
Hatziminaoglou, E.
Polletta, M.
Bondi, M.
Brinchmann, J.
Cucciati, O.
de la Torre, S.
Gregorini, L.
[J]. ASTRONOMY & ASTROPHYSICS, 2007, 472 (02) : 443 - 454
[4] THE EVOLUTION OF OPTICALLY SELECTED QSOS .2.
BOYLE, BJ
SHANKS, T
PETERSON, BA
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1988, 235 (04) : 935 - 948
[5] The 2dF QSO Redshift Survey - I. The optical luminosity function of quasi-stellar objects
Boyle, BJ
Shanks, T
Croom, SM
Smith, RJ
Miller, L
Loaring, N
Heymans, C
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 317 (04) : 1014 - 1022
[6] The first release COSMOS optical and near-IR data and catalog
Capak, P.
Aussel, H.
Ajiki, M.
McCracken, H. J.
Mobasher, B.
Scoville, N.
Shopbell, P.
Taniguchi, Y.
Thompson, D.
Tribiano, S.
Sasaki, S.
Blain, A. W.
Brusa, M.
Carilli, C.
Comastri, A.
Carollo, C. M.
Cassata, P.
Colbert, J.
Ellis, R. S.
Elvis, M.
Giavalisco, M.
Green, W.
Guzzo, L.
Hasinger, G.
Ilbert, O.
Impey, C.
Jahnke, K.
Kartaltepe, J.
Kneib, J.-P.
Koda, J.
Koekemoer, A.
Komiyama, Y.
Leauthaud, A.
Lefevre, O.
Lilly, S.
Liu, C.
Massey, R.
Miyazaki, S.
Murayama, T.
Nagao, T.
Peacock, J. A.
Pickles, A.
Porciani, C.
Renzini, A.
Rhodes, J.
Rich, M.
Salvato, M.
Sanders, D. B.
Scarlata, C.
Schiminovich, D.
[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2007, 172 (01) : 99 - 116
[7] The space density of high-redshift QSOs in the Great Observatories Origins Deep Survey
Cristiani, S
Alexander, DM
Bauer, F
Brandt, WN
Chatzichristou, ET
Fontanot, F
Grazian, A
Koekemoer, A
Lucas, RA
Monaco, P
Nonino, M
Padovani, P
Stern, D
Tozzi, P
Treister, E
Urry, CM
Vanzella, E
[J]. ASTROPHYSICAL JOURNAL, 2004, 600 (02) : L119 - L122
[8] The 2dF-SDSS LRG and QSO survey: the QSO luminosity function at 0.4 < z < 2.6
Croom, Scott M.
Richards, Gordon T.
Shanks, Tom
Boyle, Brian J.
Strauss, Michael A.
Myers, Adam D.
Nichol, Robert C.
Pimbblet, Kevin A.
Ross, Nicholas P.
Schneider, Donald P.
Sharp, Robert G.
Wake, David A.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 399 (04) : 1755 - 1772
[9] The 2dF QSO Redshift Survey - XII. The spectroscopic catalogue and luminosity function
Croom, SM
Smith, RJ
Boyle, BJ
Shanks, T
Miller, L
Outram, PJ
Loaring, NS
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 349 (04) : 1397 - 1418
[10] The discovery of a luminous z=5.80 quasar from the Sloan Digital Sky Survey
Fan, XH
White, RL
Davis, M
Becker, RH
Strauss, MA
Haiman, Z
Schneider, DP
Gregg, MD
Gunn, JE
Knapp, GR
Lupton, RH
Anderson, JE
Anderson, SF
Annis, J
Bahcall, NA
Boroski, WN
Brunner, RJ
Chen, B
Connolly, AJ
Csabai, I
Doi, M
Fukugita, M
Hennessy, GS
Hindsley, RB
Ichikawa, T
Ivezic, Z
Loveday, J
Meiksin, A
McKay, TA
Munn, JA
Newberg, HJ
Nichol, R
Okamura, S
Pier, JR
Sekiguchi, M
Shimasaku, E
Stoughton, C
Szalay, AS
Szokoly, GP
Thakar, AR
Vogeley, MS
York, DG
[J]. ASTRONOMICAL JOURNAL, 2000, 120 (03) : 1167 - 1174

← 1 2 3 4 5 →