J/A+A/587/A22 1 Del spectroscopy (Kubat+, 2016)
Spectroscopy of close visual binary components of the stable shell star
1 Delphini.
Kubat J., Kubatova B., Dolezalova B., Iliev L., Slechta M.
<Astron. Astrophys. 587, A22 (2016)>
=2016A&A...587A..22K 2016A&A...587A..22K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Spectroscopy
Keywords: stars: emission-line, Be - binaries: visual - infrared: stars -
stars: individual: 1 Del
Abstract:
Stable shell stars are ideal objects for studying basic physical
principles of the formation of disks in Be stars. If these stars have
a close unresolved visual companion, its contribution toward the
modelling of the disk cannot be overlooked, as is sometimes done. The
study aims to spectroscopically resolve close visual binary Be (shell)
star 1 Del, which up to now was only resolved by speckle or
micrometric measurements. The integral field spectroscopy obtained by
the SINFONI spectrograph at the VLT telescope in the European Southern
Observatory (ESO) in the infrared region was used; we supplemented
these observations with visual spectroscopy with the Perek Telescope
at the Ondrejov Observatory. Spectra of 1 Del were successfully
resolved, and, for the first time, spectra of 1 Del B were obtained.
We found that 1 Del A is a Be/shell star, while 1 Del B is not an
emission-line object.
Description:
Visual spectra were observed with the Perek 2-m telescope at the
Ondrejov Observatory (Czech Republic) with the slit spectrograph in
coude focus. We obtained medium-resolution spectra, (R∼13000) with the
700-mm spectrograph focus, in which the SITe CCD 2030x800 chip of 15um
pixels was used. Our spectra of 1 Del were taken on 16 September 2007.
The data were reduced (bias subtracted, flat-fielded, and wavelength
calibrated) using the Image Reduction and Analysis Facility (IRAF1).
The spectra were normalized to continuum with a straight line to fit
the far wings of the Hα line.
SINFONI observations were obtained in service mode at the VLT-UT4
(Yepun) telescope at ESO under Programme-ID 093.D-0172(A) during two
nights (6 and 10 June 2014). Spectroscopy of 1 Del was carried
out with the SINFONI, the AO-assisted integral field spectrograph
in all available near-infrared bands (J, H, and K).
Objects:
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RA (2000) DE Designation(s)
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20 30 17.96 +10 53 45.3 1 Del = HR 7836
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 238 5 List of fits files
fits/* . 5 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 27 I3 --- Ny Number of pixels along Y-axis
29- 32 I4 --- Nz ? Number of images
34- 57 A24 --- Obs.Date Observation date
59- 65 F7.5 um blambda ? Lower value of wavelength interval
67- 73 F7.5 um Blambda ? Upper value of wavelength interval
75- 82 F8.6 um dlambda ? Spectral resolution
84- 88 I5 Kibyte size Size of FITS file
90-105 A16 --- FileName Name of FITS file, in subdirectory fits
107-238 A132 --- Title Title of the FITS file
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Acknowledgements:
Jiri Kubat,
(End) Patricia Vannier [CDS] 12-Feb-2016