J/ApJ/700/844 Rotation rates of very massive stars (Penny+, 2009) ================================================================================ A FUSE survey of the rotation rates of very massive stars in the Small and Large Magellanic Clouds. Penny L.R., Gies D.R. =2009ApJ...700..844P ================================================================================ ADC_Keywords: Magellanic Clouds ; Stars, OB ; Ultraviolet ; Stars, early-type Rotational velocities Keywords: Magellanic Clouds - stars: early-type - stars: rotation - ultraviolet: stars Abstract: We present projected rotational velocity values for 96 Galactic, 55 SMC, and 106 LMC O-B type stars from archival FUSE observations. The evolved and unevolved samples from each environment are compared through the Kolmogorov-Smirnov test to determine if the distribution of equatorial rotational velocities is metallicity dependent for these massive objects. Stellar interior models predict that massive stars with SMC metallicity will have significantly reduced angular momentum loss on the main sequence compared to their Galactic counterparts. Our results find some support for this prediction but also show that even at Galactic metallicity, evolved and unevolved massive stars have fairly similar fractions of stars with large Vsin i values. Macroturbulent broadening that is present in the spectral features of Galactic evolved massive stars is lower in the LMC and SMC samples. This suggests the processes that lead to macroturbulence are dependent upon metallicity. Description: We obtained Far Ultraviolet Spectrographic Explorer (FUSE) archival spectra of 96 Galactic, 55 SMC, and 106 LMC massive stars that are available from the Multimission Archive at Space Telescope (MAST). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 80 96 *Galactic targets table2.dat 115 55 SMC targets table3.dat 126 106 LMC targets notes.dat 80 50 Individual note on objects refs.dat 78 42 References -------------------------------------------------------------------------------- Note on table1.dat: corrections made at CDS for 2 stars -------------------------------------------------------------------------------- See also: II/236 : UBVR CCD survey of the Magellanic clouds (Massey+, 2002) III/147 : Studies of LMC stellar content (Rousseau+ 1978) J/PASP/121/634 : FUSE observations in Magellanic Clouds (Blair+, 2009) J/MNRAS/353/601 : 2dF survey of the Small Magellanic Cloud (Evans+, 2004) J/AJ/127/1632 : UBVR(UIT) photometry of O and OB stars in SMC (Oey+, 2004) J/ApJS/144/21 : Galaxy and Magellanic Clouds OB and WR stars (Robert+, 2003) J/MNRAS/324/33 : MC WC/WO stars - Colliding winds (Bartzakos+ 2001) J/AJ/121/891 : UBV photometry of LMC OB associations (Parker+, 2001) J/AJ/119/2214 : Photometry of Magellanic OB associations (Massey+, 2000) J/MNRAS/284/265 : Rotational Velocities of 373 OB stars (Howarth+ 1997) J/ApJS/91/583 : MC massive stars IMF. I. (Hill+, 1994) J/AJ/103/1205 : Stellar Content of LH 9 and 10 in the LMC (Parker+ 1992) http://archive.stsci.edu/fuse/ : MAST FUSE home page Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 12 A12 --- Name Star name (BD names corrected at CDS) 14- 27 A14 --- SpT MK spectral type from Howarth et al. 1997, Cat. J/MNRAS/284/265 29- 31 I3 km/s H Mean Vsini from Howarth et al. 1997, Cat. J/MNRAS/284/265 33- 35 I3 km/s A Mean Vsini computed from the calibration of AV 327 template star 37- 39 I3 km/s S ?=- Mean Vsini computed from the calibration of SK-66 100 template star 41- 80 A40 --- Set FUSE observation(s) data set used -------------------------------------------------------------------------------- Byte-by-byte Description of file: table[23].dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 A13 --- Name Star name 15- 30 A16 --- SpT MK spectral type 31- 32 I2 --- r_SpT ? Reference for spectral classification (1) 34- 36 I3 km/s Mean vsini from this paper 38- 40 I3 km/s 2 ? Second measure of 42- 44 I3 km/s L ? Mean vsini from litterature 45 A1 --- r_L Reference for L (1) 47- 49 I3 km/s L2 ? Second mean vsini from litterature 50 A1 --- r_L2 Reference for L2 (1) 52- 54 I3 km/s L3 ? Third mean vsini from litterature 55 A1 --- r_L3 Reference for L3 (1) 57- 58 I2 km/s L4 ? Fourth mean vsini from litterature 59 A1 --- r_L4 Reference for L4 (1) 61- 70 A10 --- TStar Template star name 72-101 A30 --- Set FUSE data set(s) 103-126 A24 --- Note Notes (*: note in notes.dat file) (2) -------------------------------------------------------------------------------- Note (1): See refs.dat file Note (2): Stars with a "NO" in this column are excluded from our analysis for various reasons. -------------------------------------------------------------------------------- Byte-by-byte Description of file: notes.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 A13 --- Name Star name 15- 80 A66 --- Note Text of note -------------------------------------------------------------------------------- Byte-by-byte Description of file: refs.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 A2 --- Ref Reference number 4- 22 A19 --- BibCode Bibcode 24- 48 A25 --- Aut Author's name 50- 78 A29 --- Comm Comment -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Emmanuelle Perret [CDS] 21-Jul-2011