Rapid formation of massive black holes in close proximity to embryonic protogalaxies

Show full item record



Permalink

http://hdl.handle.net/10138/307550

Citation

Regan , J A , Visbal , E , Wise , J H , Haiman , Z , Johansson , P H & Bryan , G L 2017 , ' Rapid formation of massive black holes in close proximity to embryonic protogalaxies ' , Nature Astronomy , vol. 1 , no. 4 , 0075 . https://doi.org/10.1038/s41550-017-0075

Title: Rapid formation of massive black holes in close proximity to embryonic protogalaxies
Author: Regan, John A.; Visbal, Eli; Wise, John H.; Haiman, Zoltan; Johansson, Peter H.; Bryan, Greg L.
Contributor organization: Department of Physics
Date: 2017-04
Language: eng
Number of pages: 6
Belongs to series: Nature Astronomy
ISSN: 2397-3366
DOI: https://doi.org/10.1038/s41550-017-0075
URI: http://hdl.handle.net/10138/307550
Abstract: The appearance of supermassive black holes at very early times(1-3) in the Universe is a challenge to our understanding of star and black hole formation. The direct-collapse(4,5) black hole scenario provides a potential solution. A prerequisite for forming a direct-collapse black hole is that the formation of (much less massive) population III stars be avoided(6,7); this can be achieved by destroying H-2 by means of Lyman-Werner radiation (photons of energy around 12.6 eV). Here we show that two conditions must be met in the protogalaxy that will host the direct-collapse black hole. First, prior star formation must be delayed; this can be achieved with a background LymanWerner flux of J(BG) greater than or similar to 100J(21) (J(21) is the intensity of background radiation in units of 10(-21) erg cm(-2) s(-1) Hz(-1) sr(-1)). Second, an intense burst of Lyman-Werner radiation from a neighbouring star-bursting protogalaxy is required, just before the gas cloud undergoes gravitational collapse, to suppress star formation completely. Using high-resolution hydrodynamical simulations that include full radiative transfer, we find that these two conditions inevitably move the host protogalaxy onto the isothermal atomic cooling track, without the deleterious effects of either photo-evaporating the gas or polluting it with heavy elements. These atomically cooled, massive protogalaxies are expected ultimately to form a direct-collapse black hole of mass 10(4)-10(5)M circle dot.
Subject: DARK-MATTER HALOES
POPULATION III STARS
DIRECT COLLAPSE
VIRIAL TEMPERATURES
EARLY UNIVERSE
1ST STARS
COSMIC REIONIZATION
SUPERMASSIVE STARS
10(4) K
SIMULATIONS
115 Astronomy, Space science
Peer reviewed: Yes
Rights: other
Usage restriction: openAccess
Self-archived version: acceptedVersion


Files in this item

Total number of downloads: Loading...

Files Size Format View
1703.03805.pdf 556.6Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record