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J/ApJ/648/580       Rotational velocities in 19 open clusters     (Huang+, 2006)

Stellar rotation in young clusters. I. Evolution of projected rotational velocity distributions. Huang W., Gies D.R. <Astrophys. J., 648, 580-590 (2006)> =2006ApJ...648..580H
ADC_Keywords: Clusters, open ; Radial velocities ; Rotational velocities Keywords: line: profiles - open clusters and associations: individual (Berkeley 86, IC 1805, IC 2395, IC 2944, NGC 457, NGC 869, NGC 884, NGC 1502, NGC 2244, NGC 2362, NGC 2384, NGC 2422, NGC 2467, NGC 3293, NGC 4755, NGC 6193, NGC 7160, Trumpler 14, Trumpler 16) - stars: early-type - stars: rotation Abstract: Open clusters offer us the means to study stellar properties in samples with well-defined ages and initial chemical composition. Here we present a survey of projected rotational velocities for a large sample of mainly B-type stars in young clusters to study the time evolution of the rotational properties of massive stars. The survey is based on moderate-resolution spectra made with the WIYN 3.5m and CTIO 4m telescopes and Hydra multi-object spectrographs, and the target stars are members of 19 young open clusters with an age range of approximately 673Myr. We made fits of the observed lines HeI λλ4026, 4387, 4471, and MgII λ4481, using model theoretical profiles to find projected rotational velocities for a total of 496 OB stars. Description: Observations were made on 2000 Nov 13-16 on WIYN 3.5m and on 2001 Feb 9-12 on CTIO 4m. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 24 21 ZAMS model star parameters table3.dat 147 496 Projected Rotational Velocities of B Stars in 19 Open Clusters obs.dat 49 19 The heliocentric Julian date of observation for each night refs.dat 93 19 Webda numbering systems references table4.dat 51 19 Summary data for 19 open clusters
See also: J/ApJ/648/591 : Stellar rotation in young clusters. II. (Huang+, 2006) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Index Index 4- 9 A6 --- PSpType Pseudospectral SubType spectral type 12- 15 F4.1 kK Teff Effective temperature 17- 20 F4.1 solMass M Mass 22- 24 F3.1 solRad R Radius
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Cluster Cluster name 14- 18 I5 --- WEBDA Webda ID (http://obswww.unige.ch/web) (1) 20- 22 I3 km/s vsini Derived projected rotational velocity 24- 25 I2 km/s e_vsini Measurement error in vsini 27- 32 F6.1 km/s RV1 Radial velocity from first night, HJD specified in obs.dat file 34- 39 F6.1 km/s RV2 ? Radial velocity from second night if available, HJD specified in obs.dat file 41- 46 F6.1 km/s RV3 ? Radial velocity from third night if available, HJD specified in obs.dat file 48- 51 F4.1 --- Index Index of estimated pseudo-spectral type, detailed in table2.dat 53-147 A95 --- Notes Additional notes
Note (1): For stars not in the WEBDA database, we assign a number > 10000 and give an identification and coordinates for epoch 2000.0 in the "Notes" column; the other stars are listed using the Webda numbering systems from references detailed in refs.dat file.
Byte-by-byte Description of file: obs.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Cluster Cluster name 13- 23 F11.3 d HJD1 Heliocentric Julian date of night 1 26- 36 F11.3 d HJD2 ? Heliocentric Julian date of night 2 39- 49 F11.3 d HJD3 ? Heliocentric Julian date of night 3
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Cluster Cluster name 13- 31 A19 --- BibCode BibCode 33- 50 A18 -- Aut Author's name 52- 71 A20 --- Com Comments 73- 93 A21 --- Acronym Acronym used in Simbad name for stars in this cluster with number <10000
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Cluster Cluster name 14- 17 F4.2 [yr] logAge Age 19- 20 I2 --- N Number of stars 22- 24 I3 km/s <vsini> Mean rotational velocity from all stars 26- 27 I2 --- NB3 Number of stars with SpType≤B3 29- 31 I3 km/s <vsini>B3 Mean rotational velocity from stars with SpType≤B3 33 I1 --- N300 Number of stars with vsini>300km/s 36- 37 I2 % N300p Number of stars with vsini>300km/s in percentage 40- 41 I2 --- Nbin ? Number of binaries 44- 45 I2 % Nbinp ? Number of binaries in percentage 48- 51 A4 A4 --- Obs Observatory (CTIO or WIYN)
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 17-Jul-2008
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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