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Unveiling the nature of the 321s Orbital Period X-ray source RX J0806.3+1527

Published online by Cambridge University Press:  12 April 2016

GianLuca Israel ,
Luigi Stella ,
Stefano Covino ,
Sergio Campana ,
Gianni Marconi ,
Christopher W. Mauche ,
Sandro Mereghetti  and
Ignacio Negueruela
GianLuca Israel
Affiliation:
INAF - Osservatorio Astronomico di Roma, Via Frascati 33, Monteporzio Catone, Italy
Luigi Stella
Affiliation:
INAF - Osservatorio Astronomico di Roma, Via Frascati 33, Monteporzio Catone, Italy
Stefano Covino
Affiliation:
INAF - Osservatorio Astronomico di Brera, Via Bianchi 46, Merate, Italy
Sergio Campana
Affiliation:
INAF - Osservatorio Astronomico di Brera, Via Bianchi 46, Merate, Italy
Gianni Marconi
Affiliation:
European Southern Observatory, Casilla 19001, Santiago, Chile
Christopher W. Mauche
Affiliation:
Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, USA
Sandro Mereghetti
Affiliation:
Istituto di Fisica Cosmica G. Occhialini, CNR, Via Bassini 15, Milano, Italy
Ignacio Negueruela
Affiliation:
Dpto. de Física, Ingeniería de Sistemas y Teoría de la Señales, Universidad de Alicante, Apdo. de Correos 99, Alicante, Spain

Abstract

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A nearly simultaneous X-ray/optical (Chandra and VLT) observational campaign of RX J0806.3+1527 has been carried out during 2001. These observations allowed us to phase the X-ray and optical light curves for the first time. We measured a phase–shift of ~0.5, in good agreement with the presence of two distinct emission regions and with the X-ray irradiation process predictions. The Chandra data allowed us also to study in details the X-ray spectrum of RX J0806.3+1527, which is consistent with a soft (kT<70eV) and small (RBB <20km) black-body component. We discuss the present findings in the light of the models proposed so far to account for the X-ray emission detected from RX J0806.3+1527, and its twin source RX J1914.4+2456.

Type
Part 7. Ultra-short Period Systems
Information
International Astronomical Union Colloquium , Volume 190: Magnetic Cataclysmic Variables , 2004 , pp. 338 - 344
Copyright
Copyright © Astronomical Society of the Pacific 2004

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