J/A+A/622/A126 T Pyx 2011 outburst optical spectra (Pavana+, 2019)
Optical spectroscopic and polarization properties of 2011 outburst of the
recurrent nova T Pyxidis.
Pavana M., Anche R.M., Anupama G.C., Ramaprakash A.N., Selvakumar G.
<Astron. Astrophys. 622, A126 (2019)>
=2019A&A...622A.126P 2019A&A...622A.126P (SIMBAD/NED BibCode)
ADC_Keywords: Novae ; Binaries, cataclysmic ; Spectra, optical
Keywords: stars: individual: T Pyxidis - novae, cataclysmic variables -
techniques: spectroscopic - techniques: polarimetric
Abstract:
We aim to study the spectroscopic and ionized structural evolution of
T Pyx during its 2011 outburst, and also study the variation in degree
of polarization during its early phase.
Optical spectroscopic data of this system obtained from day
1.28-2415.62 since discovery, and optical, broadband imaging
polarimetric observations obtained from day 1.36-29.33 during the
early phases of the outburst were used in the study. The physical
conditions and the geometry of the ionized structure of the nova
ejecta was modelled for a few epochs using the photo-ionization code,
CLOUDY in 1D and pyCloudy in 3D.
The spectral evolution of the nova ejecta during its 2011 outburst is
similar to that of the previous outbursts. The variation in the line
profiles is seen very clearly in the early stages due to good coverage
during this period. The line profiles vary from P Cygni (narrower,
deeper, and sharper) to emission profiles that are broader and
structured, which later become narrower and sharper in the late
post-outburst phase. The average ejected mass is estimated to be
7.03x10-6M☉. The ionized structure of the ejecta is
found to be a bipolar conical structure with equatorial rings, with a
low inclination angle of 14.75±0.65°.
Description:
Optical spectroscopic observations of the recurrent nova T Pyxidis
during its 2011 outburst were obtained during 1.28-2415.62 days. This
paper discusses these observations along with the optical polarimetric
data obtained during the 2011 outburst.
This archive contains the reduced optical spectra of T Pyxidis
obtained using the Himalaya Faint Object Spectrograph (HFOSC) on the
2m Himalayan Chandra Telescope (HCT), IUCAA Faint Object Spectrometer
and Camera (IFOSC) on the 2m IGO telescope and Opto Mechanics Research
(OMR) and Echelle spectrograph on 2.3m Vainu Bappu Telescope (VBT).
The low resolution spectra are in ascii format and named as "date.dat"
(eg: 15apr2011.dat is the spectrum obtained on 2011 April 15 --
corresponding to the date in Table 1 of the paper). The first line of
each file contains the object name, date of observation (eg., 15 April
2011), JD, time since discovery of each observation. The data are in
two columns from the second line onwards. The first column gives the
wavelength in Angstroms, the second column gives the flux in
erg/s/cm2/Å. The high resolution spectral data (H-alpha, H-beta and
OI 8446 lines) are also in ascii format and named as "xx_date.dat"
(here xx - ha for H-alpha, hb for H-beta, o1 for OI 8446 lines; eg:
ha_16apr2011 is the H-alpha high resolution spectral line obtained on
2011 April 16 -- corresponding to the date in Table 2 of the paper).
The first line of each file contains the object name, date of
observation (eg., 15 April 2011), JD, time since discovery of each
observation. The data are in two columns from the second line onwards.
The first column gives the wavelength in Angstroms, the second column
gives the normalized flux values.
Objects:
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RA (2000) DE Designation(s)
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09 04 41.51 -32 22 47.5 T Pyx = NOVA Pyx 1902
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 74 57 List of all spectra
lr/* . 33 Individual low resolution spectra
hr/* . 24 Individual high resolution spectral lines
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See also:
J/A+A/310/173 : TY Pyx IUE FES observations (Neff+, 1996)
J/ApJ/773/55 : Light curve of T Pyx from 1890 to 2011 (Schaefer+, 2013)
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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- 54 A54 --- Title Title of the spectrum
56- 74 A19 --- FileName Name of the spectrum file
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Byte-by-byte Description of file (#): lr/*
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Bytes Format Units Label Explanations
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1- 16 F16.11 0.1nm lambda [3500-9300] Wavelength
19- 38 E20.17 cW/m2/nm Flux Flux (in erg/s/cm2/Å)
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Byte-by-byte Description of file (#): hr/*
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Bytes Format Units Label Explanations
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1- 16 F16.11 0.1nm lambda [4820-8500] Wavelength (1)
19- 38 E20.17 --- NFlux Normalized Flux in arbitrary units
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Note (1): Wavelength interval:
hr/ha* : 6515-6610Å; hr/hb* 4820-4890Å; hr/o1* 8370-8500Å
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Acknowledgements:
M. Pavana,
(End) M. Pavana [IIA, India], Patricia Vannier [CDS] 29-Dec-2018