2003A&A...401..939L

Query : 2003A&A...401..939L

2003A&A...401..939L - Astronomy and Astrophysics, volume 401939-949 (2003/4-3)

The galactic abundance gradient from Cepheids. IV. New results for the outer disc.

LUCK R.E., GIEREN W.P., ANDRIEVSKY S.M., KOVTYUKH V.V., FOUQUE P., PONT F. and KIENZLE F.

Abstract (from CDS):

As a continuation of our previous work on the abundance gradient in the outer part of the galactic disc, this paper presents results on the metallicicty distribution over galactocentric distances up to 15kpc. The outer disc is clearly separated from the middle part by the existence of a step in the metallicity distribution at about 10kpc. Taking the region of galactocentric distances from 10kpc to 15kpc, one can derive an iron gradient -0.03±0.01dex/kpc (25 stars). The existence of a discontinuity can be caused by the effective suppression of mixing processes near the corotation circle where the radial component of the gas velocity should be very small.

Abstract Copyright: ∼

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

Simbad objects: 29

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Number of rows : 29
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* GQ Ori cC* 06 11 13.5830023776 +09 36 44.985287232   9.81 8.88   7.869 B 94 1
2 V* FT Mon cC* 06 21 36.0794129472 +04 04 24.841341696   11 12.844 12.23 11.496 ~ 53 0
3 V* RS Ori cC* 06 22 13.1926522608 +14 40 41.255838516   9.34 8.42   7.270 F4Ib 166 0
4 V* T Mon cC* 06 25 12.9996760920 +07 05 08.558582892 8.24 7.20 5.98   4.996 G3Iabv+A0p 487 1
5 V* CU Mon cC* 06 32 46.7955717384 +00 02 35.314789524   15.02 13.606   11.923 ~ 57 0
6 V* WW Mon cC* 06 33 37.1818495320 +09 12 12.839048964   13.65 12.492   11.155 F6 75 0
7 V* V495 Mon cC* 06 37 03.3840074280 -02 49 26.758525188   13.69       G5 56 0
8 V* V447 Mon cC* 06 44 15.9970884360 +04 29 54.219400800     14.132   12.297 F0 39 0
9 V* V510 Mon cC* 06 47 26.9329047264 +02 31 01.442143992   14.13 12.645   10.858 ~ 48 0
10 V* TW Mon cC* 06 50 32.3363025960 +00 00 25.184213748     12.552   10.939 ~ 66 0
11 V* XX Mon cC* 06 52 12.1699411584 -02 48 25.052904036   12.81 11.52     F6 84 0
12 V* AA Mon cC* 06 57 23.7697706784 -03 50 36.027965220   14.07 12.740   11.081 ~ 61 0
13 V* TZ Mon cC* 06 58 00.9347733216 -00 22 33.463232040   11.8       G5 109 0
14 V* FG Mon cC* 07 07 08.5490458896 -07 47 42.472835376   14.44 13.182   11.720 ~ 56 0
15 V* FI Mon cC* 07 10 37.9924060392 -07 07 22.462189320   14.07 12.900   11.578 ~ 62 0
16 V* AO CMa cC* 07 24 40.5916030536 -26 11 18.607940988           ~ 45 0
17 V* CK Pup cC* 07 27 18.8848961136 -25 47 07.307024892     13.384   11.655 ~ 38 0
18 V* BC Pup cC* 07 30 02.5524981312 -23 40 26.365025028     13.841   12.247 ~ 39 0
19 V* VW Pup cC* 07 31 49.0895527488 -20 08 58.801627752   12.12 11.15     F5 84 0
20 V* VX Pup cC* 07 32 36.6489773592 -21 55 49.534161528   9.87 9.32 8.97   F3IV 147 0
21 V* HW Pup cC* 07 57 42.1676229600 -27 36 06.842167056   13.35 12.018   10.51 ~ 67 0
22 V* AQ Pup cC* 07 58 22.0887499032 -29 07 48.338631084   9.70 8.54   7.175 F5-G2Ib 212 0
23 V* RS Pup cC* 08 13 04.2157111224 -34 34 42.696447852 8.89 8.51 7.04   5.453 F8Iab 365 0
24 V* RZ Vel cC* 08 37 01.3028699904 -44 06 52.846248456   8.507 7.260     G1Ib 240 0
25 V* T Vel cC* 08 37 40.8266515248 -47 21 43.084440432   8.92 7.68   6.970 G0II 182 0
26 V* SW Vel cC* 08 43 38.6903528472 -47 24 11.200999464   9.58 8.32     F8/G0Ib 198 0
27 V* SX Vel cC* 08 44 53.4685905720 -46 20 34.736412696   9.19 8.33   7.264 F8II 147 0
28 V* RY Vel cC* 10 20 41.0315888064 -55 19 17.028180084   9.71 7.86   6.840 F5Ib/II 163 0
29 V* CF Cas cC* 23 58 17.9760671064 +61 13 15.821693832   12.72 10.80   9.700 F8Ibv 256 0

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