2003A&A...404..211P

Query : 2003A&A...404..211P

2003A&A...404..211P - Astronomy and Astrophysics, volume 404211-215 (2003/6-2)

On the early evolution of the Galactic halo.

PRANTZOS N.

Abstract (from CDS):

It is shown that the low-metallicity tail of the stellar metallicity distribution predicted by simple Outflow models for the Milky Way halo depends sensitively on whether instantaneous recycling is adopted or relaxed. In both cases, current - and still preliminary - data suggest a ``G-dwarf problem'' for the halo (reminiscent of the local disk). We suggest that the problem can be solved by introducing a (physically motivated) early infall phase. We point out several important implications of such a modification, concerning: the putative Pop. III (super)massive stars, the number of stars expected at very low metallicities, the questions of primary nitrogen and of the dispersion in abundance ratios of halo stars.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: abundances - Galaxy: evolution - Galaxy: formation - Galaxy: halo - Galaxy: stellar content

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	HE 0107-5240	Pe*	01 09 29.1555567432	-52 24 34.202039148		15.89	15.07	15.10	14.283	CEMP-no	250	0

Query : 2003A&A...404..211P

Basic data :

HE 0107-5240 -- Chemically Peculiar Star

C* (), * (UCAC2,UCAC3,...), Pe* (2007AJ), NIR (2MASS)

01 09 29.1555567432 -52 24 34.202039148 (Optical) [ 0.0144 0.0162 90 ] A 2020yCat.1350....0G

01 07 21.0360827023 -52 40 32.226864537 [ 0.0144 0.0162 90 ]

296.5333576407225 -64.4939521642944 [ 0.0144 0.0162 90 ]

2.357 -3.826 [0.018 0.023 90] A 2020yCat.1350....0G

V(km/s) 46.000000 [2.000000] / z(spectroscopic) 0.000153 [0.000007] / cz 46.00 [2.00] (Opt) B 2021MNRAS.503.2539C

0.1064 [0.0195] A 2020yCat.1350....0G

CEMP-no C 2016ApJ...833...20Y

B 15.89 [0.01] E 2012yCat.1322....0Z

V 15.07 [0.01] E 2012yCat.1322....0Z

R 15.10 [0.14] E 2012yCat.1322....0Z

G 14.949968 [0.002768] C 2020yCat.1350....0G

I 14.283 [0.007] D 2007ApJS..168..128B

J 13.676 [0.027] C 2003yCat.2246....0C

H 13.253 [0.027] C 2003yCat.2246....0C

K 13.218 [0.034] C 2003yCat.2246....0C

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`UCAC2 9168846`	`2MASS J01092916-5224341`	`UCAC3 76-2370`	`Gaia DR2 4927204800008334464`
`HE 0107-5240`	`TIC 229104313`	`UCAC4 188-001131`	`Gaia DR3 4927204800008334464`

References (250 between 1850 and 2026) (Total 250)
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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`UCAC2 9168846`	`2MASS J01092916-5224341`	`UCAC3 76-2370`	`UCAC4 188-001131`	`Gaia DR2 4927204800008334464`
`Gaia DR3 4927204800008334464`

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