Nuevo Observatorio Virtual Argentino

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

Description:

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.
 

Contact:


Gabriel Ferrero
gferrero@fcaglp.unlp.edu.ar
Facultad de Ciencias Astronómicas y Geofísicas - La Plata - Argentina

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Documentation:

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.

Reference:

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 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 meta.id;src
ssa_instrument Instrument Instrument or code used to produce these datasets N/A meta.id;instr
ssa_creatorDID C. DID Dataset identifier assigned by the creator N/A meta.id
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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