Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29705
Title: The Galaxy’s Gas Content Regulated by the Dark Matter Halo Mass Results in a Superlinear M <SUB>BH</SUB>-M <SUB>⋆</SUB> Relation
Authors: DELVECCHIO, IVAN 
Daddi, E.
Shankar, F.
Mullaney, J. R.
Zamorani, G.
Aird, J.
Bernhard, E.
Cimatti, A.
Elbaz, D.
Giavalisco, M.
Grimmett, L. P.
Issue Date: 2019
Journal: THE ASTROPHYSICAL JOURNAL LETTERS 
Number: 885
Issue: 2
First Page: L36
Abstract: Supermassive black holes (SMBHs) are tightly correlated with their hosts, but the origin of such connection remains elusive. To explore the cosmic buildup of this scaling relation, we present an empirically motivated model that tracks galaxy and SMBH growth down to z = 0. Starting from a random mass seed distribution at z = 10, we assume that each galaxy evolves on the star-forming “main sequence” (MS) and each BH follows the recently derived stellar mass (M <SUB>⋆</SUB>) dependent ratio between BH accretion rate and star formation rate, going as {BHAR}/{SFR}\propto {M}<SUB>\star </SUB><SUP>0.73[+0.22,-0.29]</SUP>. Our simple recipe naturally describes the BH-galaxy buildup in two stages. At first, the SMBH lags behind the host that evolves along the MS. Later, as the galaxy grows in M <SUB>⋆</SUB>, our M <SUB>⋆</SUB>-dependent BHAR/SFR induces a superlinear BH growth, as {M}<SUB>BH</SUB>}\propto {M}<SUB>\star </SUB><SUP>1.7</SUP>. According to this formalism, smaller BH seeds increase their relative mass faster and earlier than bigger BH seeds, at fixed M <SUB>⋆</SUB>, thus setting along a gradually tighter M <SUB>BH</SUB>-M <SUB>⋆</SUB> locus toward higher M <SUB>⋆</SUB>. Assuming reasonable values of the radiative efficiency ∊ ∼ 0.1, our empirical trend agrees with both high-redshift model predictions and intrinsic M <SUB>BH</SUB>-M <SUB>⋆</SUB> relations of local BHs. We speculate that the observed nonlinear BH-galaxy buildup is reflected in a twofold behavior with dark matter halo mass (M <SUB>DM</SUB>), displaying a clear turnover at M <SUB>DM</SUB> ∼ 2 × 10<SUP>12</SUP> M <SUB>☉</SUB>. While supernovae-driven feedback suppresses BH growth in smaller halos ({BHAR}/{SFR}\propto {M}<SUB>DM</SUB>}<SUP>1.6</SUP>), above the M <SUB>DM</SUB> threshold cold gas inflows possibly fuel both BH accretion and star formation in a similar fashion ({BHAR}/{SFR}\propto {M}<SUB>DM</SUB>}<SUP>0.3</SUP>).
URI: http://hdl.handle.net/20.500.12386/29705
URL: https://iopscience.iop.org/article/10.3847/2041-8213/ab4e21
ISSN: 2041-8205
DOI: 10.3847/2041-8213/ab4e21
Bibcode ADS: 2019ApJ...885L..36D
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
Delvecchio_2019_ApJL_885_L36.pdfpdf editoriale2.07 MBAdobe PDFView/Open
Show full item record

Page view(s)

5
checked on Jan 16, 2021

Download(s)

1
checked on Jan 16, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE