J/A+A/463/703 JHKL photometry of MWC 560 (Gromadzki+, 2007)
On the nature of the cool component of MWC 560.
Gromadzki M., Mikolajewska J., Whitelock P.A., Marang F.
<Astron. Astrophys. 463, 703 (2007)>
=2007A&A...463..703G 2007A&A...463..703G
ADC_Keywords: Stars, variable ; Photometry, infrared
Keywords: stars: binaries: symbiotic - stars: long period variables -
star: mass loss - star: individual: MWC 560 (V694 Mon) -
infrared: stars
Abstract:
MWC 560 (V694 Mon) is one of the most enigmatic symbiotic system with
a very active accretion-powered hot component. Such activity can be
supported only by a luminous asymptotic giant branch star, i.e. a Mira
or SR variable, with a high mass-loss rate. It is also a very unusual
jet source because the jet axis lies practically parallel to the line
of sight. The aims of our study are the determination of the
evolutionary status of the cool component of MWC 560. Our methods
involve analysis of near-IR JHKL and optical light curves. The cool
component of MWC 560 pulsates with a period of ∼340 days, and it is
probably a red SR variable on the thermally pulsing AGB. The high
mass-loss rate expected for such a star is sufficient to power the
observed activity of the hot companion.
Description:
JHKL broad-band photometry (1.25, 1.65, 2.2, 3.45um) was obtained with
the MkII infrared photometer on the 0.75cm telescope at SAAO,
Sutherland.
The near-IR observations cover the period from November 1984 to
February 2004.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
07 25 51.3 -07 44 08 MWC560 = V* V694 Mon
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 34 94 JHKL photometry of MWC560
--------------------------------------------------------------------------------
See also:
J/A+AS/122/43 : V694 Mon plate spectra (Tomov+ 1997)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.2 d JD Julian Date
12- 16 F5.3 mag Jmag ?=9.999 J magnitude
18- 22 F5.3 mag Hmag ?=9.999 H magnitude
24- 28 F5.3 mag Kmag ?=9.999 K magnitude
30- 34 F5.3 mag Lmag ?=9.999 L magnitude
--------------------------------------------------------------------------------
Acknowledgements:
Mariusz Gromadzki, marg(at)camk.edu.pl
(End) Mariusz Gromadzki [NCAC], Patricia Vannier [CDS] 07-Feb-2007