2002A&A...392..491A

Query : 2002A&A...392..491A

2002A&A...392..491A - Astronomy and Astrophysics, volume 392491-499 (2002/9-3)

Using Cepheids to determine the galactic abundance gradient. III. First results for the outer disc.

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

Abstract (from CDS):

As a continuation of our previous work, which concerned the radial abundance distribution in the galactic disc over the distances 4-10kpc this paper presents the first results on the metallicity in the outer disc (RG>10kpc). Based on high-resolution spectra obtained for 19 distant Cepheids we sampled galactocentric distances from 10 to 12kpc. Combined with the results of our previous work on the inner and middle parts of the galactic disc, the present data enable one to study the structure of the radial abundance distribution over a large baseline. In particular, we find indications of a discontinuity in the radial abundance distribution for iron as well as a number of the other elements. The discontinuity is seen at a galactocentric distance RG=10kpc. This finding supports the results reported earlier by Twarog et al. (1997AJ....114.2556T).

Abstract Copyright: ∼

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

VizieR on-line data: <Available at CDS (J/A+A/392/491): objects.dat objects.tex tablea1.dat tablea1.tex>

Simbad objects: 21

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Number of rows : 21
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 V* TV Cam cC* 04 07 32.7989738664 +60 19 06.462780744   12.83 11.43     F6Ibp 58 0
2 V* YZ Aur cC* 05 15 21.9827588256 +40 04 40.880491572   11.77 10.24     G5 121 0
3 V* AE Tau cC* 05 34 36.6543578832 +26 12 08.666367444     11.62     ~ 51 0
4 V* CS Ori cC* 06 07 25.4652889368 +11 09 07.112104380   11.96 11.29   10.239 F5 93 0
5 V* SV Mon cC* 06 21 26.3049089544 +06 28 12.578441700   9.32 8.28     G1Ib 187 0
6 V* V495 Mon cC* 06 37 03.3840074280 -02 49 26.758525188   13.69       G5 56 0
7 V* V504 Mon cC* 06 44 43.9472476296 -03 57 08.641451700   12.77 11.77 11.48   ~ 44 0
8 V* V508 Mon cC* 06 47 09.4000203792 +03 58 01.551642816   11.50 10.53     ~ 84 0
9 V* EE Mon cC* 06 50 48.6825989856 -07 58 50.633343948   14.03 13.06   11.724 ~ 57 0
10 V* TX Mon cC* 06 50 52.2684114720 -01 25 45.228530964   11.76 10.67   9.619 F6 112 0
11 V* XX Mon cC* 06 52 12.1699411584 -02 48 25.052904036   12.81 11.52     F6 84 0
12 V* EK Mon cC* 06 52 46.1709659400 -02 27 29.630511684   11.87 11.29     G5 81 0
13 V* AA Mon cC* 06 57 23.7697706784 -03 50 36.027965220   14.07 12.740   11.081 ~ 61 0
14 V* TZ Mon cC* 06 58 00.9347733216 -00 22 33.463232040   11.8       G5 109 0
15 V* AC Mon cC* 07 00 59.8200543168 -08 42 32.370161148   11.37 10.29     F5 95 0
16 V* VW Pup cC* 07 31 49.0895527488 -20 08 58.801627752   12.12 11.15     F5 84 0
17 V* VZ Pup cC* 07 38 35.2380326136 -28 29 58.597431036   11.469 10.154 9.583   F7.5 165 1
18 V* WW Pup cC* 07 41 54.8902435968 -21 07 59.053661364   11.36 10.53     F5 89 0
19 V* AD Pup cC* 07 48 03.8512427256 -25 34 40.024315488   10.81 9.99     F8 125 0
20 V* HW Pup cC* 07 57 42.1676229600 -27 36 06.842167056   13.35 12.018   10.51 ~ 67 0
21 V* BN Pup cC* 08 06 21.4750343856 -30 05 48.770958372   10.99 9.75 8.97 8.981 G4 140 0

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