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J/A+A/598/A84       OB-type spectroscopic binaries           (Almeida+, 2017)

The Tarantula Massive Binary Monitoring. I. Observational campaign and OB-type spectroscopic binaries. Almeida L.A., Sana H., Taylor W., Barba R., Bonanos A.Z., Crowther P., Damineli A., De Koter A., De Mink S.E., Evans C.J., Gieles M., Grin N.J., Henault-Brunet V., Langer N., Lennon D., Lockwood S., Maiz Apellaniz J., Moffat A.F.J., Neijssel C., Norman C., Ramirez-Agudelo O.H., Richardson N.D., Schootemeijer A., Shenar T., Soszynski I., Tramper F., Vink J.S. <Astron. Astrophys., 598, A84 (2017)> =2017A&A...598A..84A (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Binaries, spectroscopic ; Spectroscopy Keywords: stars: early-type - stars: massive - binaries: spectroscopic - binaries: close Abstract: Massive binaries play a crucial role in the Universe. Knowing the distributions of their orbital parameters is important for a wide range of topics from stellar feedback to binary evolution channels and from the distribution of supernova types to gravitational wave progenitors, yet no direct measurements exist outside the Milky Way. The Tarantula Massive Binary Monitoring project was designed to help fill this gap by obtaining multi-epoch radial velocity (RV) monitoring of 102 massive binaries in the 30 Doradus region. In this paper we analyze 32 FLAMES/GIRAFFE observations of 93 O- and 7 B-type binaries. We performed a Fourier analysis and obtained orbital solutions for 82 systems: 51 single-lined (SB1) and 31 double-lined (SB2) spectroscopic binaries. Results. Overall, the binary fraction and orbital properties across the 30 Doradus region are found to be similar to existing Galactic samples. This indicates that within these domains environmental effects are of second order in shaping the properties of massive binary systems. A small difference is found in the distribution of orbital periods, which is slightly flatter (in log space) in 30 Doradus than in the Galaxy, although this may be compatible within error estimates and differences in the fitting methodology. Also, orbital periods in 30 Doradus can be as short as 1.1d, somewhat shorter than seen in Galactic samples. Equal mass binaries (q>0.95) in 30 Doradus are all found outside NGC 2070, the central association that surrounds R136a, the very young and massive cluster at 30 Doradus's core. Most of the differences, albeit small, are compatible with expectations from binary evolution. One outstanding exception, however, is the fact that earlier spectral types (O2-O7) tend to have shorter orbital periods than later spectral types (O9.2-O9.7). Our results point to a relative universality of the incidence rate of massive binaries and their orbital properties in the metallicity range from solar (Z) to about half solar. This provides the first direct constraints on massive binary properties in massive star-forming galaxies at the Universe's peak of star formation at redshifts z∼1 to 2 which are estimated to have Z∼0.5 Z. Description: Log of observations and Radial velocity (RV) measurements for 100 OB-type targets observed at multi-epochs as part as the Tarantula Massive Binary Monitoring. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablec1.dat 118 100 Photometric and spectral informations of the TMBM targets tablee1.dat 25 32 Log of observations tablee2.dat 28 2453 RV data of the SB1 systems tablee3.dat 41 1326 RV data of the SB2 systems tablee4.dat 28 872 RV data of the systems with no periodicity found
See also: II/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007) J/A+A/530/A108 : VLT-FLAMES Tarantula Survey (Evans+, 2011) J/A+A/550/A107 : RV catalogue of O stars in 30 Doradus (Sana+, 2013) J/A+A/564/A40 : VFTS. O-type stellar content of 30 Dor (Walborn+, 2014) Byte-by-byte Description of file: tablec1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- VFTS [42/887] VLT-FLAMES Tarantula Survey identifier 5- 44 A40 --- SpType MK spectral type (1) 46- 50 F5.2 mag Vmag V magnitude (1) 52- 56 F5.2 mag B-V B-V colour index (1) 58- 62 F5.2 mag Jmag ?=- J magnitude (1) 64- 67 F4.2 mag e_Jmag ?=- rms uncertainty on Jmag 69- 73 F5.2 mag Hmag ?=- H magnitude (1) 75- 78 F4.2 mag e_Hmag ?=- rms uncertainty on Hmag 80- 84 F5.2 mag Kmag ?=- K magnitude (1) 86- 89 F4.2 mag e_Kmag ?=- rms uncertainty on Kmag 91- 96 F6.2 km/s dRV ?=- Amplitude of the RV variations (2) 98-106 A9 --- SB SB type (2) 108-118 A11 --- FileName Mame of the table with radial velocity data
Note (1): Spectral types, optical and near-IR photometry are from Walborn et al. (2014, Cat. J/A+A/564/A40), Evans et al. (2011, Cat. J/A+A/530/A108), and Kato et al. (2007PASJ...59..615K, Cat. II/288). Note (2): Binary classification in SB2 and dRV are from Sana et al. (2013, Cat. J/A+A/550/A107).
Byte-by-byte Description of file: tablee1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Epoch Epoch of observation 5- 8 A4 --- Grating Grating configuration 10- 19 F10.4 d HJD Heliocentric Julian date (HJD-2400000) 21 I1 --- Nexp Number of exposure 23- 25 I3 s Texp Time exposure
Byte-by-byte Description of file: tablee2.dat tablee4.dat
Bytes Format Units Label Explanations
1- 4 I4 --- VFTS [64/887] VLT-FLAMES Tarantula Survey identifier 6- 15 F10.4 d HJD Heliocentric Julian date (HJD-2400000) 17- 22 F6.1 km/s RV Radial velocity 24- 28 F5.1 km/s e_RV 1σ uncertainty on RV
Byte-by-byte Description of file: tablee3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- VFTS [42/806] VLT-FLAMES Tarantula Survey identifier 6- 15 F10.4 d HJD Heliocentric Julian date (HJD-2400000) 17- 22 F6.1 km/s RV1 Radial velocity of the star 1 24- 28 F5.1 km/s e_RV1 1σ uncertainty on RV of the star 1 30- 35 F6.1 km/s RV2 Radial velocity of the star 2 37- 41 F5.1 km/s e_RV2 1σ uncertainty on RV of the star 2
Acknowledgements: Leonardo Almeida, leonardo.almeida.andrade(at)
(End) Patricia Vannier [CDS] 19-Jul-2017
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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