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WR 35a: A new double-lined spectroscopic binary (Gamen+, 2014, A&A, 562, 13) at NOVA


Reduced spectra used in the paper entitled "WR 35a: A new double-lined spectroscopic binary", by R. Gamen et al. to appear in the A&A journal (2014).


Roberto Gamen
Facultad de Ciencias Astronómicas y Geofísicas - La Plata - Argentina

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Aims: We present the first orbital solution for the Wolf-Rayet star, WR 35a, that was discovered by a spectroscopic monitoring of faint WN-type stars.

Methods: Spectral features of two different components were identified, and thus a method of disentangling the individual spectra of both components was applied. Radial velocities were determined for each component in the binary system.

Results: The orbital solution and component properties of the system were derived. We determined that WR 35a is composed of a WN6 star with a O8.5 V companion orbiting at a 41.90-day period.

Table 2 is available in electronic form at


WR 35a: A new double-lined spectroscopic binary

Authors: Gamen, R.; Collado, A.; Barbá, R.; Chené, A.-N.; St-Louis, N.

Data Table Fields:

NameTable Head DescriptionUnitUCD
accref Product key Access key for the data N/A meta.ref.url;meta.dataset
ssa_location Location ICRS location of aperture center deg pos.eq
ssa_dateObs Date Obs. Midpoint of exposure d time.epoch
ssa_timeExt Exp. Time Exposure duration N/A time.duration
ssa_length Length Number of points in the spectrum N/A N/A
accsize File size Size of the data in bytes byte VOX:Image_FileSize
ssa_dstitle Title Title or the dataset (usually, spectrum) N/A meta.title;meta.dataset
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max
ssa_specmid Mid. Band Midpoint of region covered in this dataset m em.wl;instr.bandpass
ssa_specext Bandwidth Width of the spectrum m em.wl;instr.bandwidth
ssa_targname Object Common name of object observed. N/A;src
ssa_instrument Instrument Instrument or code used to produce these datasets N/A;instr
ssa_creatorDID C. DID Dataset identifier assigned by the creator N/A
ssa_pubDID P. DID Dataset identifier assigned by the publisher N/A N/A
ssa_cdate Proc. Date Processing/Creation date N/A time;meta.dataset
ssa_bandpass Bandpass Bandpass (i.e., rough spectral location) of this dataset; use something generic like 'Optical' here. N/A instr.bandpass
ssa_aperture Aperture Angular diameter of aperture deg instr.fov
ssa_dstype Data type Type of data (spectrum, time series, etc) N/A N/A
ssa_publisher Publisher Publisher of the datasets included here. N/A N/A
ssa_creator Creator Creator of the datasets included here. N/A N/A
ssa_collection Collection IOVA id of the originating data collection N/A N/A
ssa_datasource Src Method of generation for the data. N/A N/A
ssa_creationtype Using Process used to produce the data N/A N/A
ssa_reference Ref. URL or bibcode of a publication describing this data. N/A N/A
ssa_fluxStatError Err. flux Statistical error in flux 0.1 J/(m**2.s.m) stat.error;phot.flux.density;em
ssa_fluxSysError Sys. Err flux Systematic error in flux 0.1 J/(m**2.s.m) stat.error.sys;phot.flux.density;em
ssa_fluxcalib Calib Flux Type of flux calibration N/A N/A
ssa_binSize Spect. Bin Bin size in wavelength 10**-10 m em.wl;spect.binSize
ssa_spectStatError Err. Spect Statistical error in wavelength 10**-10 m stat.error;em
ssa_spectSysError Sys. Err. Spect Systematic error in wavelength 10**-10 m stat.error.sys;em
ssa_speccalib Calib. Spect. Type of wavelength calibration N/A meta.code.qual
ssa_specres Spec. Res. Resolution on the spectral axis m spect.resolution;em.wl
mime Type MIME type of the file served N/A N/A
owner Owner Owner of the data N/A N/A
embargo Embargo ends Date the data will become/became public a N/A
ssa_pdate Pub. Date Date last published. N/A N/A
ssa_cversion C. Version Creator assigned version for this dataset (will be incremented when this particular item is changed). N/A meta.version;meta.dataset
ssa_targclass Ob. cls Object class (star, QSO,...) N/A src.class
ssa_redshift z Redshift of target object N/A src.redshift
ssa_targetpos Obj. pos Equatorial (ICRS) position of the target object. N/A pos.eq;src
ssa_snr SNR Signal-to-noise ratio estimated for this dataset N/A stat.snr
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