Observational constraints on the co-evolution of supermassive black holes and galaxies

X. Z. Zheng, E. F. Bell, R. S. Somerville, H. W. Rix, K. Jahnke, F. Fontanot, George H. Rieke, D. Schiminovich, K. Meisenheimer

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The star formation rate (SFR) and black hole accretion rate (BHAR) functions are measured to be proportional to each other at z≲ 3. This close correspondence between SF and BHA would naturally yield a BH mass-galaxy mass correlation, whereas a BH mass-bulge mass correlation is observed. To explore this apparent contradiction, we study the SF in spheroid-dominated galaxies between z = 1 and the present day. We use 903 galaxies from the COMBO-17 survey with M* > 2 × 1010 M, ultraviolet and infrared-derived SFRs from Spitzer and Galaxy Evolution Explorer, and morphologies from GEMS Hubble Space Telescope/Advanced Camera for Surveys imaging. Using stacking techniques, we find that <25% of all SF occurs in spheroid-dominated galaxies (Sérsic index n > 2.5), while the BHAR that we would expect if the global scalings held is 3 times higher. This rules out the simplest picture of co-evolution, in which SF and BHA trace each other at all times. These results could be explained if SF and BHA occur in the same events, but offset in time, for example at different stages of a merger event. However, one would then expect to see the corresponding star formation activity in early-stage mergers, in conflict with observations. We conclude that the major episodes of SF and BHA occur in different events, with the bulk of SF happening in isolated disks and most BHA occurring in major mergers. The apparent global co-evolution results from the regulation of the BH growth by the potential well of the galactic spheroid, which includes a major contribution from disrupted disk stars.

Original languageEnglish (US)
Pages (from-to)1566-1577
Number of pages12
JournalAstrophysical Journal
Volume707
Issue number2
DOIs
StatePublished - 2009

Fingerprint

coevolution
merger
galaxies
spheroids
accretion
star formation rate
Hubble Space Telescope
stacking
star formation
cameras
scaling
stars
rate

Keywords

  • Galaxies: active
  • Galaxies: evolution
  • Quasars: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Zheng, X. Z., Bell, E. F., Somerville, R. S., Rix, H. W., Jahnke, K., Fontanot, F., ... Meisenheimer, K. (2009). Observational constraints on the co-evolution of supermassive black holes and galaxies. Astrophysical Journal, 707(2), 1566-1577. https://doi.org/10.1088/0004-637X/707/2/1566

Observational constraints on the co-evolution of supermassive black holes and galaxies. / Zheng, X. Z.; Bell, E. F.; Somerville, R. S.; Rix, H. W.; Jahnke, K.; Fontanot, F.; Rieke, George H.; Schiminovich, D.; Meisenheimer, K.

In: Astrophysical Journal, Vol. 707, No. 2, 2009, p. 1566-1577.

Research output: Contribution to journalArticle

Zheng, XZ, Bell, EF, Somerville, RS, Rix, HW, Jahnke, K, Fontanot, F, Rieke, GH, Schiminovich, D & Meisenheimer, K 2009, 'Observational constraints on the co-evolution of supermassive black holes and galaxies', Astrophysical Journal, vol. 707, no. 2, pp. 1566-1577. https://doi.org/10.1088/0004-637X/707/2/1566
Zheng, X. Z. ; Bell, E. F. ; Somerville, R. S. ; Rix, H. W. ; Jahnke, K. ; Fontanot, F. ; Rieke, George H. ; Schiminovich, D. ; Meisenheimer, K. / Observational constraints on the co-evolution of supermassive black holes and galaxies. In: Astrophysical Journal. 2009 ; Vol. 707, No. 2. pp. 1566-1577.
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