J/ApJ/704/750 Rotational behavior of metal-poor stars (Cortes+, 2009)
An overview of the rotational behavior of metal-poor stars.
Cortes C., Silva J.R.P., Recio-Blanco A., Catelan M., Do Nascimento J.D.,
De Medeiros J.R.
<Astrophys. J., 704, 750-769 (2009)>
=2009ApJ...704..750C 2009ApJ...704..750C
ADC_Keywords: Abundances, [Fe/H] ; Clusters, globular ; Magnitudes ;
Stars, metal-deficient
Keywords: stars: evolution - stars: fundamental parameters -
stars: Population II - stars: rotation - stars: statistics
Abstract:
This paper describes the behavior of the rotational velocity in
metal-poor stars ([Fe/H]≤-0.5dex) in different evolutionary stages,
based on vsini values from the literature. Our sample is comprised of
stars in the field and some Galactic globular clusters, including
stars on the main sequence, the red giant branch (RGB), and the
horizontal branch (HB). The metal-poor stars are, mainly, slow
rotators, and their vsini distribution along the HR diagram is quite
homogeneous. Nevertheless, a few moderate to high values of vsini are
found in stars located on the main sequence and the HB. We show that
the overall distribution of vsini values is basically independent of
metallicity for the stars in our sample. We present an extensive
tabulation of all quantities discussed in this paper, including
rotation velocities, temperatures, gravities, and metallicities
[Fe/H], as well as broadband magnitudes and colors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 36 10 Chemical and photometrical parameters for
Galactic globular clusters
table3.dat 57 316 Data characteristics of field metal-poor stars
table4.dat 90 214 Data characteristics of globular cluster stars
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See also:
VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/A+A/458/895 : vsini of evolved metal-poor stars (de Medeiros+, 2006)
J/A+A/434/235 : Abundances of BHB stars in NGC 1904 (Fabbian+, 2005)
J/A+A/364/102 : Abundances of field BHB star candidates (Kinman+, 2000)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- M Messier cluster identification
6- 13 A8 --- NGC NGC cluster identification
15- 19 F5.2 [Sun] [Fe/H] Metallicity
21- 25 F5.2 mag VMag Absolute V-band magnitude
27- 31 F5.2 mag (m-M)V Distance modulus in V-band
33- 36 F4.2 mag E(B-V) Extinction
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star name
15- 19 I5 K Teff Effective temperature
21- 24 F4.2 [cm/s2] logg Surface gravity
26- 30 F5.1 km/s vsini Rotational velocity
32 A1 --- l_[Fe/H] Limit flag on [Fe/H]
33- 37 F5.2 [-] [Fe/H] Metallicity
39- 43 F5.2 mag Vmag ? SIMBAD V-band magnitude
45- 49 F5.2 mag B-V ? SIMBAD (B-V) color index
51- 55 F5.2 mag V-I ? (V-I) color index from Hipparcos
(Cat. I/239)
57 I1 --- Ref Reference for vsini (1)
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Note (1): References as follows:
1 = Kinman et al. 2000, Cat. J/A+A/364/102;
2 = Behr 2003ApJS..149..101B 2003ApJS..149..101B;
3 = Carney et al. 2003AJ....125..293C 2003AJ....125..293C;
4 = De Medeiros et al. 2006, Cat. J/A+A/458/895;
5 = Carney et al. 2008AJ....135..892C 2008AJ....135..892C.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cl Cluster name
9- 16 A8 --- Name Star name
18- 27 A10 --- OID Other identification(s)
29- 33 I5 K Teff ? Effective temperature
35- 38 F4.2 [cm/s2] logg ? Surface gravity
40- 44 F5.2 km/s vsini Rotational velocity
46- 50 F5.2 [Sun] [Fe/H] ? Metallicity
52- 56 F5.2 mag Vmag ? Apparent V magnitude (1)
58- 62 F5.2 mag B-V ? (B-V) color index (1)
64- 68 F5.2 mag mag ? Magnitude in band according to flag
70- 74 F5.2 mag CI ? Color index according to flag n_mag
75 A1 --- n_mag [a-e] Flag indicating in which band are "mag"
and "CI" (2)
77- 80 F4.2 mag VMag ? Absolute V-band magnitude (MV) (3)
82- 86 F5.2 mag (B-V)0 ? Dereddened (B-V) color index (3)
88- 90 A3 --- Ref Reference(s) (4)
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Note (1): For the stars in M 79, the V values are based on measurements
using the y passband of the Stromgren system, since V and y magnitudes
are well known to be basically identical (Clem et al. 2004, Cat.
J/AJ/127/1227).
Note (2): Flag as follows:
a = (V-I) Johnson system.
b = u, (u-y) Stromgren system.
c = F555W, (F439W-F555W) Stromgren system.
d = (U-V) Johnson system.
e = U, (U-B) Johnson system.
Note (3): We calculated the absolute magnitude MV and the unreddened color
(B-V)0 provided using the distance modulus and reddening values
compiled in Harris (1996, Cat. VII/195, superseded by VII/202) for
each globular cluster (see Table 2).
Note (4): References as follows:
1 = Peterson 1985ApJ...289..320P 1985ApJ...289..320P;
2 = Peterson et al. 1995ApJ...453..214P 1995ApJ...453..214P;
3 = Cohen & McCarthy 1997AJ....113.1353C 1997AJ....113.1353C;
4 = Recio-Blanco et al. 2002ApJ...572L..71R 2002ApJ...572L..71R;
5 = Behr 2003ApJS..149...67B 2003ApJS..149...67B;
6 = Crocker et al. 1988ApJ...332..236C 1988ApJ...332..236C;
7 = Moehler et al. 1995A&A...294...65M 1995A&A...294...65M;
8 = Fabbian et al. 2005, Cat. J/A+A/434/235.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 10-Nov-2011