SIMBAD references

2015A&A...574A..13E - Astronomy and Astrophysics, volume 574A, 13-13 (2015/2-1)

The VLT-FLAMES Tarantula Survey. XVIII. Classifications and radial velocities of the B-type stars.

EVANS C.J., KENNEDY M.B., DUFTON P.L., HOWARTH I.D., WALBORN N.R., MARKOVA N., CLARK J.S., DE MINK S.E., DE KOTER A., DUNSTALL P.R., HENAULT-BRUNET V., MAIZ-APELLANIZ J., McEVOY C.M., SANA H., SIMON-DIAZ S., TAYLOR W.D. and VINK J.S.

Abstract (from CDS):

We present spectral classifications for 438 B-type stars observed as part of the VLT-FLAMES Tarantula Survey (VFTS) in the 30 Doradus region of the Large Magellanic Cloud. Radial velocities are provided for 307 apparently single stars, and for 99 targets with radial-velocity variations which are consistent with them being spectroscopic binaries. We investigate the spatial distribution of the radial velocities across the 30 Dor region, and use the results to identify candidate runaway stars. Excluding potential runaways and members of two older clusters in the survey region (SL639 and Hodge301), we determine a systemic velocity for 30 Dor of 271.6±12.2km/s from 273 presumed single stars. Employing a 3σ criterion we identify nine candidate runaway stars (2.9% of the single stars with radial-velocity estimates). The projected rotational velocities of the candidate runaways appear to be significantly different to those of the full B-type sample, with a strong preference for either large (≥345km/s) or small (≤65km/s) rotational velocities. Of the candidate runaways, VFTS358 (classified B0.5: V) has the largest differential radial velocity (-106.9±16.2km/s), and a preliminary atmospheric analysis finds a significantly enriched nitrogen abundance of 12+log(N/H)> 8.5. Combined with a large rotational velocity (vesini=345±22km/s), this is suggestive of past binary interaction for this star.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: early-type - open clusters and associations: individual: NGC 2060 - open clusters and associations: individual: NGC 2070 - open clusters and associations: individual: Hodge 301 - open clusters and associations: individual: SL 639

VizieR on-line data: <Available at CDS (J/A+A/574/A13): table3.dat table7.dat tablea1.dat tablea2.dat tablea3.dat>

Status at CDS:  

Simbad objects: 467

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2020.05.26-21:30:13

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