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High-resolution optical spectra of HD165052 (Ferrero+, 2013) at NOVA


This is a set of high-resolution high-S/N optical spectra of the massive binary star HD 165 052 (O7Vz + O7.5Vz) taken between 2008 April and 2011 May with echelle spectrographs at CASLEO (mainly), LCO and ESO. Each one covers the spectral range 3700-6000 A with a resolution varying between ~13000 and ~45000 @ 5000A according to the instrument. Originally, the spectra were secured for radial velocity measurements. More details about observations, instrument configurations and reduction process can be found in documentation section.


Gabriel Ferrero
Facultad de Ciencias Astronómicas y Geofísicas - La Plata - Argentina

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We present a new set of radial velocity measurements of the spectroscopic binary HD 165052 obtained by disentangling high-resolution optical spectra. The longitude of the periastron (ϖ = 60 ± 2°) shows a variation with respect to previous studies. We have determined the apsidal motion rate of the system, ϖ =12.1 ± 0.3° yr-1, which was used to calculate the absolute masses of the binary components: M1 = 22.5 ± 1.0 M⊙ and M2 = 20.5 ± 0.9 M⊙. Analysing the separated spectra, we have reclassified the components as O7Vz and O7.5Vz stars.


Apsidal motion in massive close binary systems - I. HD 165052, an extreme case?

Authors: Ferrero, G.; Gamen, R.; Benvenuto, O.; Fernandez-Lajus, E.

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 s 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 N/A
ssa_dstitle Title A compact and descriptive designation of the dataset. N/A meta.title;meta.dataset
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_pdate Pub. Date Date last published. N/A N/A
ssa_bandpass Bandpass Bandpass (i.e., rough spectral location) of this dataset; this should be the most appropriate term from the values of VODataService vs:Waveband. N/A instr.bandpass
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_targname Object Common name of object observed. N/A;src
ssa_targclass Ob. cls Object class (star, QSO,...; use Simbad object classification if at all possible) 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
ssa_aperture Aperture Angular diameter of aperture deg instr.fov
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_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_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 A short handle naming the collection this spectrum belongs to. N/A N/A
ssa_instrument Instrument Instrument or code used to produce these datasets N/A;instr
ssa_datasource Src Method of generation for the data (one of survey, pointed, theory, custom, artificial). N/A N/A
ssa_creationtype Using Process used to produce the data (archival, cutout, filtered, mosaic, projection, spectralExtraction, or catalogExtraction) 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 N/A stat.error;phot.flux.density;em
ssa_fluxSysError Sys. Err flux Systematic error in flux N/A stat.error.sys;phot.flux.density;em
ssa_fluxcalib Calib Flux Type of flux calibration (ABSOLUTE, CALIBRATED, RELATIVE, NORMALIZED, or UNCALIBRATED). N/A N/A
ssa_binSize Spect. Bin Bin size in wavelength m em.wl;spect.binSize
ssa_spectStatError Err. Spect Statistical error in wavelength m stat.error;em
ssa_spectSysError Sys. Err. Spect Systematic error in wavelength 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 meta.code.mime
owner Owner Owner of the data N/A N/A
embargo Embargo ends Date the data will become/became public a N/A
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