2018AJ....156....2M

Query : 2018AJ....156....2M

2018AJ....156....2M - Astron. J., 156, 2-2 (2018/July-1)

Chlorine isotope ratios in M giants.

MAAS Z.G. and PILACHOWSKI C.A.

Abstract (from CDS):

We have measured the chlorine isotope ratio in six M giant stars using HCl 1-0 P8 features at 3.7 microns with R ∼ 50000 spectra from Phoenix on Gemini South. The average Cl isotope ratio for our sample of stars is 2.66 ± 0.58 and the range of measured Cl isotope ratios is 1.76 < 35Cl/37Cl < 3.42. The solar system meteoric Cl isotope ratio of 3.13 is consistent with the range seen in the six stars. We suspect the large variations in Cl isotope ratio are intrinsic to the stars in our sample given the uncertainties. Our average isotopic ratio is higher than the value of 1.80 for the solar neighborhood at solar metallicity predicted by galactic chemical evolution models. Finally, the stellar isotope ratios in our sample are similar to those measured in the interstellar medium.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: abundances

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* GN Cet LP* 00 24 31.4855265120 -09 54 04.091658156   12.00 10.83     M6 7 0
2 V* AH Phe LP* 00 46 57.4472911680 -47 58 52.225834044   10.73 9.50     M6III 8 0
3 V* R Scl C* 01 26 58.0939182720 -32 32 35.439234828 17.26 9.59 5.72 3.69 2.30 C-N5+ 332 0
4 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1032 3
5 BD-17 491 LP? 02 32 36.9901314984 -16 43 36.299289396   11.45 10.34     M5 6 0
6 * rho02 Ari LP* 02 55 48.4979998 +18 19 53.902936 8.56 7.44 5.93 3.51 1.34 M6-III: 224 0
7 V* AV Eri LP* 04 19 57.7005603552 -18 43 19.640826264   13.27 11.35     M6.5 11 0
8 V* R Lep C* 04 59 36.3486921120 -14 48 22.502479140 15.06 13.51 7.76 4.90 3.42 C7,6e 339 0
9 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1170 2
10 M 42 HII 05 35 17 -05 23.4           ~ 4081 0
11 V* V2457 Ori Or* 05 35 26.97000 -05 09 54.4644         18.858 ~ 151 0
12 NAME Ori A MoC 05 38 -07.1           ~ 3015 0
13 V* BQ Mon LP* 07 04 25.7758466520 -09 57 58.093516728     12.5     M7 17 0
14 V* KO Mon LP* 07 30 07.6793756304 -09 23 17.274475356   12.42 10.89     M6 10 0
15 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2344 0
16 V* V Hya C* 10 51 37.2615873024 -21 15 00.333928044   12.23 6.80 7.42   C-N:6 366 0
17 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2320 1
18 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 343 0
19 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4395 3
20 W 31c HII 18 10 29.1 -19 56 05           ~ 341 0
21 RAFGL 2136 Y*O 18 22 26.52888 -13 30 14.0400           ~ 285 0
22 QSO B1830-211 Bla 18 33 39.9399138048 -21 03 39.368838780     18.70 21   ~ 675 1
23 W 49n HII 19 10 13.2 +09 06 12           ~ 470 3
24 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 873 1

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