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J/A+A/551/A62 V2492 Cyg light variations (Kospal+, 2013)
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Beginning of ReadMe :J/A+A/551/A62 V2492 Cyg light variations (Kospal+, 2013)
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Exploring the circumstellar environment of the young eruptive star V2492 Cygni.
Kospal A., Abraham P., Acosta-Pulido J.A., Arevalo Morales M.J., Balog Z.,
Carnerero M.I., Szegedi-Elek E., Farkas A., Henning T., Kelemen J.,
Kovacs T., Kun M., Marton G., Meszaros SZ., Moor A., Pal A., Sarneczky K.,
Szakats R., Szalai N., Szing A., Toth I., Turner N.J., Vida K.
<Astron. Astrophys., 551, A62-62 (2013)>
=2013A&A...551A..62K
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ADC_Keywords: Stars, variable ; Photometry
Keywords: stars: formation - circumstellar matter - infrared: stars -
stars: individual: V2492 Cyg
Abstract:
V2492 Cyg is a young eruptive star that went into outburst in 2010.
The near-infrared color changes observed since the outburst peak
suggest that the source belongs to a newly defined sub-class of young
eruptive stars, where time-dependent accretion and variable
line-of-sight extinction play a combined role in the flux changes.
In order to learn about the origin of the light variations and to
explore the circumstellar and interstellar environment of V2492 Cyg,
we monitored the source at ten different wavelengths, between 0.55um
and 2.2um from the ground and between 3.6um and 160um from space.
We analyze the light curves and study the color-color diagrams via
comparison with the standard reddening path. We examine the structure
of the molecular cloud hosting V2492 Cyg by computing temperature
and optical depth maps from the far-infrared data.
Description:
We obtained optical and near-infrared images with VRIJHKs filters
between 2010 September 19 and 2012 October 12 using four telescopes:
the Schmidt and RCC telescopes of the Konkoly Observatory (Hungary),
as well as the IAC-80 and Telescopio Carlos Sanchez (TCS) telescopes
of the Teide Observatory in the Canary Islands (Spain).
We observed V2492 Cyg using the Spitzer Space Telescope in the
post-helium phase at eight epochs between 2011 September 8 and 2012
September 16 (PID: 80165, PI: P. Abraham).
We conducted a four-epoch far-infrared monitoring of V2492 Cyg with
the Herschel Space Observatory between 2011 October 29 and 2012
January 11 (PID: DDT_akospal_2, PI: A. Kospal). We used the
Photodetector Array Camera and Spectrometer (PACS) instrument.
Objects:
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RA (2000) DE Designation(s)
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20 51 26.18 +44 05 20.5 V2492 Cyg = V* V2492 Cyg
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