2006A&A...455L..13R


Query : 2006A&A...455L..13R

2006A&A...455L..13R - Astronomy and Astrophysics, volume 455, L13-16 (2006/8-4)

Sulphur abundances in disk stars as determined from the forbidden λ10821 [SI] line.

RYDE N.

Abstract (from CDS):

In this paper we aim to study the chemical evolution of sulphur in the galactic disk, using a new optimal abundance indicator: the [SI] line at 10821Å. Similar to the optimal oxygen indicators, the [OI] lines, the [SI] line has the virtues of being less sensitive to the assumed temperatures of the stars investigated and of likely being less prone to non-LTE effects than other tracers. High-resolution, near-infrared spectra of the [SI] line are recorded using the phoenix spectrometer on the Gemini South telescope. The analysis is based on 1D, LTE model atmospheres using a homogeneous set of stellar parameters. The λ10821 [SI] line is suitable for an abundance analysis of disk stars, and the sulphur abundances derived from it are consistent with abundances derived from other tracers. We corroborate that, for disk stars, the trend of sulphur-to-iron ratios with metallicity is similar to that found for other alpha elements, supporting the idea of a common nucleosynthetic origin.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: atmospheres - stars: late-type - Galaxy: disk - infrared: stars

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 * eps And PM* 00 38 33.3474310042 +29 18 42.311618884 5.72 5.25 4.38 3.70 3.19 G7IIIFe-3CH1 267 0
2 * nu. Psc * 01 41 25.8939097 +05 29 15.406225 7.36 5.81 4.44 3.38 2.67 K3III 232 0
3 HD 40460 PM* 06 00 06.0388316880 +27 16 19.870394412   7.651 6.617     K1III 85 0
4 HD 81192 RG* 09 24 45.3356450736 +19 47 11.867336592 8.06 7.50 6.56     G8IIICH 117 0
5 HD 117876 RG* 13 32 48.2138325552 +24 20 48.277563036   7.09 6.10 5.5   G8II-III 119 0
6 * 16 Ser SB* 15 36 29.5738934952 +10 00 36.529391340   6.217 5.253     K0III:CN1Ba0.7Sr2 200 0
7 * 83 Her PM* 17 42 28.3623041280 +24 33 50.606295912   6.993 5.558     K4III 72 0
8 * eta Ser PM* 18 21 18.6005560 -02 53 55.776595 4.84 4.19 3.25 2.55 2.05 K0III-IV 365 0
9 * mu. Aql PM* 19 34 05.3529921054 +07 22 44.184329526 6.87 5.63 4.45 3.55 2.94 K3-IIIbFe0.5 258 1
10 * bet Aql PM* 19 55 18.7928429719 +06 24 24.351242346 5.040 4.560 3.710 3.05 2.56 G8IV 535 0
11 * 35 Peg PM* 22 27 51.5231162634 +04 41 44.404460456 6.74 5.86 4.80 4.02 3.46 K1-III-IV 261 0
12 * 40 Peg PM* 22 38 52.5937940592 +19 31 20.103857904 7.370 6.750 5.820     G8II 63 0
13 * gam Psc PM* 23 17 09.9374911 +03 16 56.237975 5.20 4.62 3.70 2.98 2.47 G9III:Fe-2 260 0
14 * tet Psc PM* 23 27 58.0946643849 +06 22 44.372303191 6.41 5.38 4.30 3.50 2.97 K0.5III 169 0

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2022.12.07-04:19:08

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