2017ApJ...844..111C

Query : 2017ApJ...844..111C

2017ApJ...844..111C - Astrophys. J., 844, 111-111 (2017/August-1)

How the first stars regulated star formation. II. Enrichment by nearby supernovae.

CHEN K.-J., WHALEN D.J., WOLLENBERG K.M.J., GLOVER S.C.O. and KLESSEN R.S.

Abstract (from CDS):

Metals from Population III (Pop III) supernovae led to the formation of less massive Pop II stars in the early universe, altering the course of evolution of primeval galaxies and cosmological reionization. There are a variety of scenarios in which heavy elements from the first supernovae were taken up into second-generation stars, but cosmological simulations only model them on the largest scales. We present small-scale, high-resolution simulations of the chemical enrichment of a primordial halo by a nearby supernova after partial evaporation by the progenitor star. We find that ejecta from the explosion crash into and mix violently with ablative flows driven off the halo by the star, creating dense, enriched clumps capable of collapsing into Pop II stars. Metals may mix less efficiently with the partially exposed core of the halo, so it might form either Pop III or Pop II stars. Both Pop II and III stars may thus form after the collision if the ejecta do not strip all the gas from the halo. The partial evaporation of the halo prior to the explosion is crucial to its later enrichment by the supernova.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): cosmology: theory - early universe - galaxies: high-redshift - intergalactic medium - stars: Population III - supernovae: general - supernovae: general

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1

Query : 2017ApJ...844..111C

Basic data :
NAME Leo IV -- Low Surface Brightness Galaxy
Other object types: otypes_help 		LSB (2024PASJ), G (2014AJ)
ICRS coord. (ep=J2000) : 		11 32 57.0 -00 32 00 [ ] D 2007ApJ...654..897B
FK4 coord. (ep=B1950 eq=1950) : 		11 30 23.3 -00 15 25 [ ]
Gal coord. (ep=J2000) : 		265.4413 +56.5144 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 132.3 [1.4] / z(spectroscopic) 0.000441 [0.000005] / cz 132.33 [1.40]
   C 2012AJ....144....4M
Morphological type: 		dG D 2007ApJ...654..897B
Angular size (arcmin): 		5.2 5.2 0 (~) D 2024PASJ...76..733H
Fluxes (1) :
V 15.1 [0.4] D 2012AJ....144....4M
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Hierarchy : number of linked objects
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: 2
: 12 		: 102 Display criteria :

Identifiers (2) :
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NAME Leo IV NAME Leo IV Dwarf Galaxy

References (419 between 1850 and 2026) (Total 419)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Distance : 4    Fe/H : 1   

   

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