Artículo
Abstract:
We report the results from the temporal and spectral analysis of an XMM-Newton observation of Nova Centauri 1986 (V842 Cen). We detect a period at 3.51 ± 0.4 h in the EPIC data and at 4.0 ± 0.8 h in the Optical Monitor (OM) data. The X-ray spectrum is consistent with the emission from an absorbed thin thermal plasma with a temperature distribution given by an isobaric cooling flow. The maximum temperature of the cooling flow model is kT max = 43 +23 -12 keV. Such a high temperature can be reached in a shocked region and, given the periodicity detected, most likely arises in a magnetically channelled accretion flow characteristic of intermediate polars. The pulsed fraction of the 3.51-h modulation decreases with energy as observed in the X-ray light curves of magnetic cataclysmic variables, possibly due either to occultation of the accretion column by the white dwarf body or phase-dependent to absorption. We do not find the 57-s white dwarf spin period, with a pulse amplitude of 4 mmag, reported by Woudt et al. in either the OM data, which are sensitive to pulse amplitudes ≳0.03 mag, or the EPIC data, sensitive to pulse fractions p ≳ 14 ± 2 per cent. © 2012 The Authors. Monthly Notices of the Royal Astronomical Society. © 2012 RAS.
Registro:
| Documento: | Artículo |
| Título: | XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen) |
| Autor: | Luna, G.J.M.; Diaz, M.P.; Brickhouse, N.S.; Moraes, M. |
| Filiación: | Instituto de Astronomía y Física del Espacio (IAFE/Conicet), CC67, Suc., 28 C1428ZAA Caba, Argentina Instituto de Ciencias Astronómicas, de la Tierra y del Espacio, Av. España Sur 1512, J5402DSP San Juan, Argentina IAG, Universidade de São Paulo, Rua do Matão 1226, São Paulo, SP 05508-900, Brazil Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, United States |
| Palabras clave: | Cataclysmic variables; Novae; X-rays: general |
| Año: | 2012 |
| Volumen: | 423 |
| Número: | 1 |
| Página de inicio: | L75 |
| Página de fin: | L78 |
| DOI: | http://dx.doi.org/10.1111/j.1745-3933.2012.01260.x |
| Título revista: | Monthly Notices of the Royal Astronomical Society: Letters |
| Título revista abreviado: | Mon. Not. R. Astron. Soc. Lett |
| ISSN: | 17453933 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17453933_v423_n1_pL75_Luna |
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Citas:
---------- APA ----------
Luna, G.J.M., Diaz, M.P., Brickhouse, N.S. & Moraes, M. (2012) . XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen). Monthly Notices of the Royal Astronomical Society: Letters, 423(1), L75-L78.http://dx.doi.org/10.1111/j.1745-3933.2012.01260.x
---------- CHICAGO ----------
Luna, G.J.M., Diaz, M.P., Brickhouse, N.S., Moraes, M. "XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)" . Monthly Notices of the Royal Astronomical Society: Letters 423, no. 1 (2012) : L75-L78.http://dx.doi.org/10.1111/j.1745-3933.2012.01260.x
---------- MLA ----------
Luna, G.J.M., Diaz, M.P., Brickhouse, N.S., Moraes, M. "XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)" . Monthly Notices of the Royal Astronomical Society: Letters, vol. 423, no. 1, 2012, pp. L75-L78.http://dx.doi.org/10.1111/j.1745-3933.2012.01260.x
---------- VANCOUVER ----------
Luna, G.J.M., Diaz, M.P., Brickhouse, N.S., Moraes, M. XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen). Mon. Not. R. Astron. Soc. Lett. 2012;423(1):L75-L78.http://dx.doi.org/10.1111/j.1745-3933.2012.01260.x
