XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)

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 th...

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Autores principales: Luna, G.J.M., Diaz, M.P., Brickhouse, N.S., Moraes, M.
Formato: JOUR
Materias:
Cataclysmic variables
Novae
X-rays: general
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17453933_v423_n1_pL75_Luna
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_17453933_v423_n1_pL75_Luna2023-10-03T16:32:00Z XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen) Luna, G.J.M. Diaz, M.P. Brickhouse, N.S. Moraes, M. Cataclysmic variables Novae X-rays: general 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17453933_v423_n1_pL75_Luna
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cataclysmic variables
Novae
X-rays: general
spellingShingle Cataclysmic variables
Novae
X-rays: general
Luna, G.J.M.
Diaz, M.P.
Brickhouse, N.S.
Moraes, M.
XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
topic_facet Cataclysmic variables
Novae
X-rays: general
description 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.
format JOUR
author Luna, G.J.M.
Diaz, M.P.
Brickhouse, N.S.
Moraes, M.
author_facet Luna, G.J.M.
Diaz, M.P.
Brickhouse, N.S.
Moraes, M.
author_sort Luna, G.J.M.
title XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
title_short XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
title_full XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
title_fullStr XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
title_full_unstemmed XMM-Newton EPIC and OM observation of Nova Centauri 1986 (V842 Cen)
title_sort xmm-newton epic and om observation of nova centauri 1986 (v842 cen)
url http://hdl.handle.net/20.500.12110/paper_17453933_v423_n1_pL75_Luna
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AT diazmp xmmnewtonepicandomobservationofnovacentauri1986v842cen
AT brickhousens xmmnewtonepicandomobservationofnovacentauri1986v842cen
AT moraesm xmmnewtonepicandomobservationofnovacentauri1986v842cen
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