2002A&A...384..140A


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.23CEST22:15:15

2002A&A...384..140A - Astronomy and Astrophysics, volume 384, 140-144 (2002/3-2)

Using Cepheids to determine the galactic abundance gradient. II. Towards the Galactic Center.

ANDRIEVSKY S.M., BERSIER D., KOVTYUKH V.V., LUCK R.E., MACIEL W.J., LEPINE J.R.D. and BELETSKY Y.V.

Abstract (from CDS):

Based on spectra obtained at the Anglo-Australian Observatory, we present a discussion of the metallicity of the galactic disc derived using Cepheids at galactocentric distances of 4-6kpc. Our new results together with previous gradient determination (Paper I, Andrievsky et al., 2002A&A...381...32A) show that the overall abundance distribution within the galactocentric distances 4-11kpc cannot be represented by a single gradient value. The distribution is more likely bimodal: it is flatter in the solar neighbourhood with a small gradient, and steepens towards the galactic center. The steepening begins at a distance of about 6.6kpc.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: Cepheids - Galaxy: abundances - Galaxy: evolution

Simbad objects: 8

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Number of rows : 8

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 IC 348 OpC 03 44 34 +32 09.8           ~ 1235 1
2 V* V340 Ara cC* 16 45 19.1122888146 -51 20 33.394152547   11.39 10.03     ~ 63 0
3 V* KQ Sco cC* 16 51 38.5473466715 -45 25 36.105341336 12.37 10.69 9.31     K7 114 0
4 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11671 0
5 V* AV Sgr cC* 18 04 48.7864032131 -22 43 56.645836757   13.39     10.595 ~ 56 0
6 V* VY Sgr cC* 18 12 04.5660706883 -20 42 14.465377948   12.70 11.36     F6 62 0
7 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 940 2
8 V* UZ Sct cC* 18 31 22.3666774568 -12 55 43.338736715   13.23 10.91   9.195 G0 75 0

    Equat.    Gal    SGal    Ecl

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2020.09.23-22:15:15

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