J/A+A/462/683 Velocities in SMC field of NGC 330 (Martayan+, 2007)
Effects of metallicity, star-formation conditions, and evolution in B and Be
stars. II. Small Magellanic Cloud, field of NGC 330.
Martayan C., Fremat Y., Hubert A.-M., Floquet M., Zorec J., Neiner C.
<Astron. Astrophys., 462, 683-694 (2007)>
=2007A&A...462..683M 2007A&A...462..683M
ADC_Keywords: Magellanic Clouds ; Radial velocities ; Rotational velocities ;
MK spectral classification ; Effective temperatures
Keywords: stars: early-type - stars: emission-line, Be -
galaxies: Magellanic Clouds - stars: fundamental parameters -
stars: evolution - stars: rotation
Abstract:
We search for the effects of metallicity on B and Be stars in the
Small and Large Magellanic Clouds (SMC and LMC) and in the Milky Way
(MW), by extending our previous analysis of B and Be star populations
in the LMC to the SMC. The rotational velocities of massive stars and
the evolutionary status of Be stars are examined with respect to their
environments.
Spectroscopic observations of hot stars belonging to the young cluster
SMC-NGC 330 and its surrounding region were obtained with the
VLT-GIRAFFE facilities in MEDUSA mode. We determined fundamental
parameters for B and Be stars with the GIRFIT code, taking the effect
of fast rotation and the age of observed clusters into account. We
compared the mean vsini obtained by spectral type- and mass-selection
for field and cluster B and Be stars in the SMC with the one in the
LMC and MW.
Description:
This work makes use of spectra obtained with the multifibre
VLT-FLAMES/GIRAFFE spectrograph in Medusa mode (131 fibres) at medium
resolution (R=6400) in setup LR02 (396.4-456.7 nm). Observations (ESO
runs 72.D-0245A and 72.D-0245C) were carried out in the young cluster
SMC-NGC330 and in its surrounding field, as part of the Guaranteed
Time Observation programmes of the Paris Observatory (P.I.:
F. Hammer). Spectra were obtained on October 21, 22, and 23, 2003 and
September 9 and 10, 2004.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 198 Fundamental parameters for O, B, A stars in the SMC
table3.dat 128 134 *Apparent fundamental parameters for Be stars in the SMC
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Note on table3.dat: The last three lines correspond to emission-line
objects which are not Be stars
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See also:
J/A+AS/134/489 : Be stars in MC young clusters (Keller+ 1999)
Byte-by-byte Description of file: table[13].dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Star Star name (1)
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 26 F6.3 s RAs Right ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29- 30 I2 deg DEd Declination (J2000)
32- 33 I2 arcmin DEm Declination (J2000)
35- 39 F5.2 arcsec DEs Declination (J2000)
41- 46 F6.3 mag Vmag ?=- EIS V magnitude
48- 52 F5.2 mag B-V ?=- EIS B-V colour index
54- 56 I3 --- S/N Signal-to-noise ratio
58- 62 I5 K Teff ? Effective temperature
64- 67 I4 K e_Teff ? rms uncertainty on Teff
69- 71 F3.1 [cm/s2] logg ? Gravity surface
73- 75 F3.1 [cm/s2] e_logg ? rms uncertainty on logg
77- 79 I3 km/s vsini ? Rotational velocity
81- 82 I2 km/s e_vsini ? rms uncertainty on vsini
84- 86 I3 km/s RV ? Radial velocity
88- 89 I2 km/s e_RV ? rms uncertainty on RV
91-100 A10 --- CFP MK spectral type determined from fundamental
parameters (method 2)
102-108 A7 --- CEW MK spectral type determined from EW diagrams
(method 1)
110-112 A3 --- Loc Localisation of cluster (2)
114 A1 --- Flag [#] # for star was pre-selected in our
catalogue of emission line stars (unpublished)
116-119 I4 ---- K99 ? Keller et al., 1999, Cat. J/A+AS/134/489
number, Cl* NGC 330 KWBBE NNNN in Simbad
121-128 A8 --- SpSim Spectral type from SIMBAD
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Note (1): Star names:
SMC5_NNNNNN for EIS (Momany et al., 2001A&A...379..436M 2001A&A...379..436M) except
2 stars labelled MHF[S61]NNNNN. Coordinates are taken from EIS
catalogues, except for the two MHF stars.
Note (2): Localisation of cluster as follows:
cl0 = NGC 330 (0:56:19 -72:27:52)
cl1 = H 86 170 (0:56:21 -72:21:12)
cl2 = [BS95]78 (0:56:04 -72:20:12)
cl3 = the association SMC ASS 39 (0:56:6 -72:18:00)
cl4 = OGLE-SMC109 (0:57:29.8 -72: 15:51.9)
cl5 = NGC299 (0:53:24.5 -72:11:49) corrected coordinates
cl6 = NGC306 (0:54:15 -72:14:30)
cl7 = H86 145 (0:53:37 -72:21:00)
cl8 = OGLE-SMC99 (0:54:48.24 -72:27:57.8)
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History:
From electronic version of the journal
References:
Martayan et al., Paper I 2006A&A...452..273M 2006A&A...452..273M
(End) Patricia Vannier [CDS] 11-Sep-2007