2002ApJ...564..395V

Query : 2002ApJ...564..395V

2002ApJ...564..395V - Astrophys. J., 564, 395-404 (2002/January-1)

Zirconium to titanium ratios in a large sample of galactic S stars.

VANTURE A.D. and WALLERSTEIN G.

Abstract (from CDS):

The [Zr/Ti] ratio for a large sample of Galactic S stars has been determined using high-quality, high-resolution spectra. The pattern of Zr enhancements in intrinsic and extrinsic S stars is found to differ, and the [Zr/Ti] ratio in the extrinsic S stars clearly links them to the strong barium stars. In addition, the pattern of [Zr/Ti] ratios seems to indicate that the progression of spectral type M to MS to S to SC is due largely to an increase in the abundance of s-process elements and not solely to a changing C/O ratio as claimed by some investigators (such as Scalo and Ross).

Abstract Copyright: ∼

Journal keyword(s): Stars: Abundances - Stars: AGB and Post-AGB - Stars: Evolution - Stars: Fundamental Parameters

Simbad objects: 34

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Number of rows : 34
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 * chi Peg PM* 00 14 36.1642825005 +20 12 24.130377664 8.280 6.380 4.800 3.45 2.32 M2+III 197 0
2 V* DT Psc Sy* 01 14 04.9051442688 +28 31 46.448476788   8.016 6.347     S3+/2- 129 0
3 V* W And S* 02 17 32.9612209924 +44 18 17.757276489   9.62   7.39   S7-8/1e-M7Se 225 1
4 V* WX Cam S* 03 49 03.7421392032 +53 10 59.132001396   12.67 10.18     S5/5.5 38 0
5 V* V1135 Tau S* 04 06 04.6922802312 +24 43 55.575406632 13.270 10.940 8.880     S3/3 44 0
6 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1298 2
7 * 54 Eri LP* 04 40 26.5114226976 -19 40 17.370744924 7.80 5.90 4.30 2.81 1.40 M3/4III 76 0
8 * omi Ori S* 04 52 31.9624004856 +14 15 02.311506180   6.458 4.721     M3SIII 225 0
9 V* TV Aur S* 04 58 08.2129478880 +48 33 37.067023224   11.47 9.32     S5/6 67 0
10 V* V1261 Ori Sy* 05 22 18.6449207496 -08 39 58.031922816 10.28 8.57 6.77     S4,1 170 0
11 V* S UMa S* 12 43 56.6759612760 +61 05 35.501371908   11.3 7.10 8.02   S0.5-6/6e 177 1
12 V* AV CVn S* 13 21 18.7357930872 +43 59 13.700690736   11.7 9.78     S3/4 28 0
13 V* BY Boo LP? 14 07 55.7554099635 +43 51 16.028575533 8.52 6.86 5.28 3.43 1.77 M4.5III 186 0
14 V* R Cam S* 14 17 51.0361093608 +83 49 53.840253360   11.33 9.74     S2-6.5/2.5-6e 81 0
15 BD+23 3093 S* 17 22 07.1003530080 +23 49 03.314841996   11.60 9.75     S3.5/2.5 20 0
16 V* V530 Lyr S* 18 30 34.5709214544 +36 14 56.999721696   9.01 7.44     S3+/1-III: 61 0
17 V* BP Sct S* 18 31 09.7755632952 -09 22 11.204665464     11.5 9.30   S5.5/5.5 24 0
18 V* V679 Oph S* 18 41 57.1688061216 +06 49 07.203828000   11.4 8.92     S5/5+ 62 0
19 HD 178717 SB* 19 09 22.0095424584 +10 14 28.239748008   9.05 7.14     K3.5III:Ba4+ 119 0
20 V* EP Vul S* 19 33 17.8371536064 +23 39 19.506133512   15.65 11.00 7.79   S6.5/5 61 1
21 Vy 12 S* 19 37 22.8503043720 +67 11 19.999732020   12.73 10.13     S5-/6: 12 0
22 HD 191226 S* 20 07 26.5352829840 +36 34 03.963225900   9.16 7.33     M1-3SIIIa 63 0
23 V* V441 Cyg S* 20 27 08.1147520512 +36 33 06.503128128   12.04 9.80 7.58   S4,6 51 0
24 V* AD Cyg S* 20 31 36.5133153840 +32 33 52.355493648   11.22 8.87     S5/5 66 0
25 V* FF Cyg S* 20 38 51.7061539632 +37 53 23.233261128     11.29 8.63   S5.5/6-e 53 0
26 V* V1981 Cyg LP* 21 02 24.1997590656 +44 47 27.525392304 9.73 7.90 6.23 4.46 2.90 M4.5III 116 0
27 V* V471 Cyg S* 21 07 07.7566155984 +38 34 05.308749624   12.28 10.22     S5.5/5.5 17 0
28 BD+31 4391 S* 21 15 41.1687655320 +31 45 39.469496148   11.53 9.690 9.13   S2.5/3.5 13 0
29 * pi.01 Gru S* 22 22 44.2083897000 -45 56 52.791160956 10.52 8.62 6.55 3.19 0.52 S5,7: 216 0
30 CD-45 14790 S* 22 45 01.4125571952 -44 52 38.448535764   11.41 9.74     S6,6 13 0
31 * bet Peg LP* 23 03 46.45746 +28 04 58.0336 6.05 4.09 2.42 0.92 -0.40 M2.5II-III 606 1
32 * 57 Peg S* 23 09 31.4573825 +08 40 37.763634   6.48 5.14     M4S 136 0
33 * 8 And V* 23 17 44.6472657024 +49 00 55.082930904 8.50 6.53 4.86 3.40 2.14 M2.5IIIBa0.5 118 0
34 BD+28 4592 S* 23 29 43.0770127344 +29 15 39.769938072   11.14 9.39     S2/3: 30 0

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