1998AJ....115..658R

Query : 1998AJ....115..658R

1998AJ....115..658R - Astron. J., 115, 658-665 (1998/February-0)

The metallicity of Palomar 1.

ROSENBERG A., PIOTTO G., SAVIANE I., APARICIO A. and GRATTON R.

Abstract (from CDS):

Palomar 1 is a peculiar Galactic globular cluster suspected of being younger than the bulk of Galactic halo objects. However, such a low age can be confirmed only after a reliable determination of the metallicity. In the present paper, we use the equivalent widths, W, of the Ca II triplet on medium-resolution spectra to determine the metal content of Pal 1. From the comparison of the luminosity-corrected W's in four stars of Pal 1 with those of a sample of stars in each of three calibration clusters (M2, M15, and M71), we derive [Fe/H] = -0.6 ± 0.2 on the Zinn-West scale or [Fe/H] = -0.7±0.2 on the Carretta-Gratton scale. We also obtain a radial velocity vr = -82.8±3.3 km.s–1 for Pal 1.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Globular Clusters: Individual: Name: Palomar 1 - Stars: Abundances

Nomenclature: Table 2: Cl* NGC 7089 RPS R (Nos I-IV), Cl* NGC 7078 RPS R (Nos I-III), Cl* 6838 RPS R (Nos I-IV), Cl* Palomar 1 RPS R (Nos I-IV).

Simbad objects: 19

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Number of rows : 19
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 2MASS J03331238+7934593 RG* 03 33 12.3341819856 +79 34 59.209275216     17.827   16.628 ~ 2 0
2 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 267 1
3 2MASS J03332183+7935382 RG* 03 33 21.8268068232 +79 35 38.253781932     16.675   15.459 ~ 12 0
4 2MASS J03332680+7935343 RG* 03 33 27.0005769192 +79 35 34.762914492     18.032   16.969 ~ 2 0
5 2MASS J03332960+7934162 RG* 03 33 29.5887269856 +79 34 16.161003372     16.843   15.618 ~ 10 0
6 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
7 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
8 Cl* NGC 7089 RPS III * 21 33 11.9416019256 -00 43 06.506395356     17.47     ~ 1 0
9 Cl* NGC 7089 RPS I * 21 33 15.8269801224 -00 44 45.668704668     16.79     ~ 1 0
10 Cl* NGC 7089 RPS IV * 21 33 17.6893657008 -00 43 14.440767780     17.55     ~ 1 0
11 Cl* NGC 7089 RPS II * 21 33 25.6135717224 -00 43 40.587464244   17.2 16.9     ~ 1 0
12 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
13 Cl* NGC 7078 RPS I * ~ ~     15.87     ~ 1 0
14 Cl* NGC 7078 RPS III * ~ ~     16.91     ~ 1 0
15 Cl* NGC 6838 RPS I * ~ ~     15.46     ~ 1 0
16 Cl* NGC 6838 RPS II * ~ ~     15.56     ~ 1 0
17 Cl* NGC 6838 RPS III * ~ ~     15.96     ~ 1 0
18 Cl* NGC 6838 RPS IV * ~ ~     16.15     ~ 1 0
19 Cl* NGC 7078 RPS II * ~ ~     15.97     ~ 1 0

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