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20 April 2024 |
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The post-outburst photometric behaviour of V838 Mon | | Lisa A. Crause
; Warrick A. Lawson
; David Kilkenny
; Francois van Wyk
; Fred Marang
; Albert F. Jones
; | | Date: |
22 Dec 2002 | | Journal: | Mon.Not.Roy.Astron.Soc. 341 (2003) 785 | | Subject: | astro-ph | | Affiliation: | UCT), Warrick A. Lawson (ADFA), David Kilkenny (SAAO), Francois van Wyk (SAAO), Fred Marang (SAAO | | Abstract: | The unusual eruptive variable discovered in Monoceros in 2002 January underwent dramatic photometric and spectroscopic changes in the months prior to its 2002 June-August conjunction with the Sun. Optical and infrared (IR) photometry obtained at the South African Astronomical Observatory (SAAO) between 2002 January and June (JD 2452280-440) is presented here in an analysis of the star’s post-outburst behaviour. The light curve indicated 3 eruptions took place in 2002 January, February and March. SAAO echelle spectra obtained in the week prior to the March maximum indicated the ejection of a new shell of material. JHKL photometry obtained during 2002 April showed the development of an IR excess due to the formation of a dust shell. The shell appears to be largely responsible for the rapid fade in the optical flux during 2002 April-May (Delta V > 6 mag within 3 weeks). Blueing of the optical colours during the decline is likely due either to the revealing of an emission line region surrounding V838 Mon, or the unveiling of the progenitor or a spatially-close early-type star. | | Source: | arXiv, astro-ph/0301423 | | Services: | Forum | Review | PDF | Favorites | |
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