Linking Star Formation and Black Hole Accretion in galaxies
| Main Authors: | Rodighiero, Giulia, Carraro, Rosamaria, Enia, Andrea, Cassata, Paolo |
|---|---|
| Format: | Proceeding Journal |
| Terbitan: |
, 2017
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| Online Access: |
https://zenodo.org/record/810068 |
Daftar Isi:
- We investigate the co-evolution of the black hole accretion rate ( BHAR) and the star formation rate ( SFR) in 0.5 < z < 3.5 galaxies displaying a greater diversity of star-forming properties compared to previous studies. We combine X-ray stacking and far-IR photometry of stellar mass-limited samples of normal star-forming, starburst, and quiescent/quenched galaxies in the COSMOS field. We corroborate the existence of a strong correlation between BHAR ( i.e., the X-ray luminosity, LX) and stellar mass (M*) for normal star-forming galaxies, though we find a steeper relation than previously reported. Contrary to studies based on smaller samples, we find that the BHAR/SFR ratio of main-sequence (MS) galaxies is not mass invariant, but scales weakly as M* to the power of 0.4, implying faster BH growth in more massive galaxies at any cosmic epoch. We also discuss implications for the interpretation of the main local scaling relations (in particular the BH mass/host stellar mass).