J/AJ/129/809 B-star rotational velocities in h and χ Persei (Strom+, 2005)
B star rotational velocities in h and χ Persei: a probe of initial
conditions during the star formation epoch.
Strom S.E., Wolff S.C., Dror D.H.A.
<Astron. J., 129, 809-828 (2005)>
=2005AJ....129..809S 2005AJ....129..809S
ADC_Keywords: Clusters, open ; Stars, B-type ; Rotational velocities
Keywords: open clusters and associations: individual (NGC 869, NGC 884) -
stars: formation - stars: rotation
Abstract:
Projected rotational velocities (vsini) have been measured for 216
B0-B9 stars in the rich, dense h and χ Persei double cluster and
compared with the distribution of rotational velocities for a sample
of field stars having comparable ages (t∼12-15Myr) and masses
(M∼4-15MSun).
Description:
Spectra of the h and χ Per stars in our sample were obtained
during three nights in 2002 September with the Hydra multifiber
spectrograph and the WIYN 3.5m telescope on Kitt Peak.
Objects:
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RA (2000) DE Designation(s)
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02 19 00 +57 09.0 h Persei = NGC 869
02 22 24 +57 07.0 χ Persei = NGC 884
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 71 216 Data for stars in h and χ Persei
table2.dat 43 474 Data for field stars
table3.dat 54 75 Data for field stars
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See also:
J/ApJ/576/880 : CCD UBV photometry of h and χ Per (Slesnick+, 2002)
J/A+A/372/477 : ubvyβ photometry of h + chi Persei (Marco+, 2001)
J/A+A/394/479 : uvbyβ photometry of h and chi Per (Capilla+, 2002)
J/AJ/122/248 : h and chi Per UBVI,Hα photometry (Keller+, 2001)
V/122 : SB9: 9th Catalogue of Spectroscopic Binary Orbits
(Pourbaix+ 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- [SHM2002] Star identification number (1)
6- 9 I4 --- ONum ? The Oosterhoff number
11- 15 F5.2 mag VMAG Absolute visual magnitude (1)
17- 21 F5.3 K logT Log of the effective temperature (1)
23- 29 A7 --- SpType MK Spectral type
31- 34 F4.1 solMass Mass Mass in solar units (1)
36- 38 I3 km/s vsini Derived rotational velocity
40 I1 --- Group ? Evolutionay stage (G1)
42- 47 F6.3 mag c0 ? Stromgren c0 index
49- 53 F5.3 mag beta ? Stromgren β index
55- 70 A16 --- Bin Spectroscopic binary with velocity amplitude
K>30km/s?
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Note (1): From Slesnick, Hillenbrand, & Massey (2002, Cat. J/ApJ/576/880).
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1 I1 --- Group Evolutionay stage (G1)
3- 6 I4 --- HR The HR number
8- 13 I6 --- HD The HD number
15- 25 A11 --- SpType MK Spectral type
27- 29 I3 km/s vsini Derived rotational velocity
31- 35 F5.3 mag beta Stromgren β index
37- 42 F6.3 mag c0 Stromgren c0 index
44- 46 A3 --- r_BType [ALG] Flag on BType (1)
48- 50 A3 --- BType [sb1 sb2] Binary type (2)
52- 54 I3 km/s K ? Amplitude of the velocity variation
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Note (1): ALG indicates that the only evidence for binarity is the report of
double lines in Cat. J/ApJ/573/359.
Note (2): Binary type, defined as follows:
sb1 = single-lined binary
sb2 = doubled-lined binary
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Global Notes:
Note (G1): Group type, defined as follows:
1 = relatively unevolved stars, still located within 0.5mag of the zero-age
main sequence;
2 = stars located within 1mag of the zero-age main sequence;
3 = stars that have evolved significantly from the zero-age main sequence.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 27-Jul-2005