2004A&A...413..159A


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST21:30:44

2004A&A...413..159A - Astronomy and Astrophysics, volume 413, 159-172 (2004/1-1)

The Galactic abundance gradient from Cepheids. V. Transition zone between 10 and 11 kpc.

ANDRIEVSKY S.M., LUCK R.E., MARTIN P. and LEPINE J.R.D.

Abstract (from CDS):

This paper reports on the spectroscopic investigation of 12 Cepheids which are situated in the crucial region of galactocentric distances from 9 kpc to 12 kpc, where according to our previous results (Andrievsky et al., 2002A&A...392..491A]; Luck et al. (2003A&A...401..939L) the radial metallicity distribution experiences an obvious change. In particular, the wriggle in the iron abundance distribution is found to fall approximately at galactocentric distances 10-11kpc (assuming galactocentric distance of the Sun RG,☉=7.9kpc). Within the transition zone from 10 to 11kpc the relative-to-solar iron abundance decreases approximately to -0.2dex. The new sample of stars, analyzed in present paper, gives results supporting the previous conclusion about the multimodal character of the metallicity distribution in galactic disc. Using a quite simple consideration of galactic chemical evolution we show that the observed distribution can be explained in the framework of a model which includes the spiral arms. In particular, the wriggle feature associated with RG≃11kpc can be interpreted as a change of metallicity level in the vicinity of the galactic corotation resonance.

Abstract Copyright:

Journal keyword(s): stars: abundances - Galaxy: abundances - Galaxy: evolution - stars: variables: cepheids

VizieR on-line data: <Available at CDS (J/A+A/413/159): stars.dat tablea1.dat tablea1.tex>

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* MM Per cC* 03 45 23.3537632397 +48 05 00.539676795   11.67 10.93     ~ 26 0
2 * mu. Per SB* 04 14 53.8625277 +48 24 33.591168 5.75 5.12 4.16 3.38 2.83 G0Ib 217 0
3 V* V335 Aur cC* 05 42 29.2584824196 +37 38 46.817355337   13.62       ~ 31 0
4 V* AO Aur cC* 05 47 45.0529654365 +32 00 52.719751503   11.33 10.44     F5 39 0
5 V* RZ Gem cC* 06 02 36.5872523443 +22 14 02.947734335   10.83 9.91 9.68 8.679 F5 106 0
6 V* AA Gem cC* 06 06 34.9459286635 +26 19 45.205210801   11.0 9.91   8.540 K0 103 0
7 V* DX Gem cC* 06 33 54.6101670962 +14 28 17.011049441   11.24 10.73     ~ 83 0
8 V* BB Gem cC* 06 34 35.2938235569 +13 04 44.707699381   11.85 11.16     ~ 57 0
9 V* AD Gem cC* 06 43 07.5116892124 +20 56 20.801766765   10.42 9.80   9.044 F5 89 0
10 V* UY Mon cC* 06 58 50.3176103311 +09 37 21.838154223   9.89 9.37     F8II 65 0
11 V* RY CMa cC* 07 16 37.6358131162 -11 29 14.298952423   8.99 8.19   7.133 F8Ib/II 139 0
12 V* TW CMa cC* 07 22 02.3794845665 -14 19 05.497464410   10.40 9.59   8.429 F5 85 0
13 V* VZ CMa cC* 07 26 28.2447083234 -25 55 36.415556319   10.33 9.46 9.56   F5II 69 0
14 NGC 3359 EmG 10 46 36.845 +63 13 25.10 10.83 11.03 10.57     ~ 336 1
15 V* SV Vul cC* 19 51 30.9059608126 +27 27 36.835645654 8.65 7.86 6.74   5.703 F8Ia 389 0

    Equat.    Gal    SGal    Ecl

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2019.10.14-21:30:44

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