J/A+A/602/A71 IUE continuum fluxes of SY Mus (Shagatova+, 2017)
Wind asymmetry imprint in the UV light curves of the symbiotic binary SY Mus.
Shagatova N., Skopal A.
<Astron. Astrophys. 602, A71 (2017)>
=2017A&A...602A..71S 2017A&A...602A..71S (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Spectra, ultraviolet
Keywords: scattering - binaries: symbiotic - stars: winds, outflows -
stars: individual: SY Mus
Abstract:
Light curves (LCs) of some symbiotic stars show a different slope of
the ascending and descending branch of their minimum profile. The
origin of this asymmetry is not well understood. We explain this
effect in the ultraviolet LCs of the symbiotic binary SY Mus. We model
the continuum fluxes in the spectra obtained by the International
Ultraviolet Explorer at ten wavelengths, from 1280 to 3080Å. We
consider that the white dwarf radiation is attenuated by H0 atoms,
H- ions, and free electrons in the red giant wind. Variation in the
nebular component is approximated by a sine wave along the orbit as
suggested by spectral energy distribution models. The model includes
asymmetric wind velocity distribution and the corresponding ionization
structure of the binary. We determined distribution of the H0 and
H+, as well as upper limits of H- and H0 column densities in the
neutral and ionized region at the selected wavelengths as functions of
the orbital phase. Corresponding models of the LCs match well the
observed continuum fluxes. In this way, we suggested the main UV
continuum absorbing (scattering) processes in the circumbinary
environment of S-type symbiotic stars. The asymmetric profile of the
ultraviolet LCs of SY Mus is caused by the asymmetric distribution of
the circumstellar matter at the near-orbital-plane area.
Description:
Logarithms of the continuum flux in erg/(cm2.s.Å) of S-type
symbiotic star SY Mus from IUE SWP+LWP/LWR spectra are presented. For
each spectrum, the orbital phase, the logarithm of continuum flux at
ten wavelengths from 1280 to 3080Å (second to eleventh column), MJD
and the spectrum number are given.
Objects:
-----------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------
11 32 10.01 -65 25 11.6 SY Mus = V* SY Mus
-----------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 214 44 *UV continuum fluxes of SY Mus
--------------------------------------------------------------------------------
Note on table1.dat: Correction for interstellar extinction according to Cardelli
et al. (1989ApJ...345..245C 1989ApJ...345..245C) with E(B-V)=0.35 (Skopal, 2005A&A...440..995S 2005A&A...440..995S).
--------------------------------------------------------------------------------
See also:
J/A+A/317/712 : UV fluxes and electron density of AG Peg (Altamore+ 1997)
J/A+A/333/658 : D-type symbiotic stars emission line fluxes (Pereira+ 1998)
J/MNRAS/383/845 : Spectroscopy of AE Circinus (Mennickent+, 2008)
J/AN/333/242 : Recent photometry of symbiotic stars (Skopal+, 2012)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.4 --- phi Orbital phase
8- 13 F6.2 [10mW/m2] logF1280 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1280Å
15 A1 --- --- [-]
16- 19 F4.2 [10mW/m2] e_logF1280 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1280Å
21- 25 F5.2 [10mW/m2] E_logF1280 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1280Å
27- 32 F6.2 [10mW/m2] logF1340 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1340Å
34 A1 --- --- [-]
35- 38 F4.2 [10mW/m2] e_logF1340 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1340Å
40- 44 F5.2 [10mW/m2] E_logF1340 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1340Å
46- 51 F6.2 [10mW/m2] logF1450 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1450Å
53 A1 --- --- [-]
54- 57 F4.2 [10mW/m2] e_logF1450 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1450Å
59- 63 F5.2 [10mW/m2] E_logF1450 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1450Å
65- 70 F6.2 [10mW/m2] logF1520 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1520Å
72 A1 --- --- [-]
73- 76 F4.2 [10mW/m2] e_logF1520 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1520Å
78- 82 F5.2 [10mW/m2] E_logF1520 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1520Å
84- 89 F6.2 [10mW/m2] logF1600 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1600Å
91 A1 --- --- [-]
92- 95 F4.2 [10mW/m2] e_logF1600 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1600Å
97-101 F5.2 [10mW/m2] E_logF1600 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1600Å
103-108 F6.2 [10mW/m2] logF1800 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1800Å
110 A1 --- --- [-]
111-114 F4.2 [10mW/m2] e_logF1800 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)]
at λ=1800Å
116-120 F5.2 [10mW/m2] E_logF1800 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1800Å
122-127 F6.2 [10mW/m2] logF1950 Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=1950Å
129 A1 --- --- [-]
130-133 F4.2 [10mW/m2] e_logF1950 Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)]
at λ=1950Å
135-139 F5.2 [10mW/m2] E_logF1950 Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=1950Å
141-146 F6.2 [10mW/m2] logF2400 ? Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=2400Å
148 A1 --- --- [-]
149-152 F4.2 [10mW/m2] e_logF2400 ? Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=2400Å
154-158 F5.2 [10mW/m2] E_logF2400 ? Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=2400Å
160-165 F6.2 [10mW/m2] logF2700 ? Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=2700Å
167 A1 --- --- [-]
168-171 F4.2 [10mW/m2] e_logF2700 ? Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=2700Å
173-177 F5.2 [10mW/m2] E_logF2700 ? Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=2700Å
179-184 F6.2 [10mW/m2] logF3080 ? Logarithm of [continuum flux in
erg/cm2/s/Å) over 1 erg/cm2/s/Å)]
at λ=3080Å
186 A1 --- --- [-]
187-190 F4.2 [10mW/m2] e_logF3080 ? Negative value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=3080Å
192-196 F5.2 [10mW/m2] E_logF3080 ? Positive value error of the logarithm of
[continuum flux in erg/cm2/s/Å) over
1 erg/cm2/s/Å)] at λ=3080Å
198-202 I5 d MJD Modified Julian Date
204-208 I5 --- SWP Number of the IUE SWP spectrum
210-214 I5 --- LWP/LWR ? Number of the IUE LWP or LWR spectrum
--------------------------------------------------------------------------------
Acknowledgements:
Natalia Shagatova, nshagatova(at)ta3.sk
(End) Natalia Shagatova [AI SAS, Slovakia], Patricia Vannier [CDS] 11-Apr-2017