2015A&A...579A..98A


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.29CET15:43:08

2015A&A...579A..98A - Astronomy and Astrophysics, volume 579A, 98-98 (2015/7-1)

An equatorial ultra iron-poor star identified in BOSS.

ALLENDE PRIETO C., FERNANDEZ-ALVAR E., AGUADO D.S., GONZALEZ HERNANDEZ J.I., REBOLO R., LEE Y.S., BEERS T.C., ROCKOSI C.M. and GE J.

Abstract (from CDS):

We report the discovery of SDSS J131326.89-001941.4, an ultra iron-poor red giant star ([Fe/H]≃-4.3) with a very high carbon abundance ([C/Fe]≃+2.5). This object is the fifth star in this rare class, and the combination of a fairly low effective temperature (Teff≃5300K), which enhances line absorption, with its brightness (g=16.9), makes it possible to measure the abundances of calcium, carbon and iron using a low-resolution spectrum from the Sloan Digital Sky Survey. We examine the carbon and iron abundance ratios in this star and other similar objects in the light of predicted yields from metal-free massive stars, and conclude that they are consistent. By way of comparison, stars with similarly low iron abundances but lower carbon-to-iron ratios deviate from the theoretical predictions.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: fundamental parameters - stars: Population III - Galaxy: formation - Galaxy: halo

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2MASS J13132688-0019415 Pe* 13 13 26.8883961320 -00 19 41.335927067           CEMP-no 25 0
2 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2016 0

    Equat.    Gal    SGal    Ecl

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2020.10.29-15:43:08

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