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Unveiling the Multi-wavelength Phenomenology of Anomalous X-ray Pulsars

Published online by Cambridge University Press:  19 July 2016

GianLuca Israel ,
Luigi Stella ,
Stefano Covino ,
Sergio Campana ,
Lorella Angelini ,
Roberto Mignani ,
Sandro Mereghetti ,
Gianni Marconi  and
Rosalba Perna
GianLuca Israel
Affiliation:
INAF — Osservatorio Astronomico di Roma, Italy
Luigi Stella
Affiliation:
INAF — Osservatorio Astronomico di Roma, Italy
Stefano Covino
Affiliation:
INAF — Osservatorio Astronomico di Brera, Italy
Sergio Campana
Affiliation:
INAF — Osservatorio Astronomico di Brera, Italy
Lorella Angelini
Affiliation:
NASA/Goddard, Space Flight Center, USA
Roberto Mignani
Affiliation:
European Southern Observatory, Garching, Germany
Sandro Mereghetti
Affiliation:
CNR, Istituto di Astrofisica Spaziale e Fisica Cosmica, Milano, Italy
Gianni Marconi
Affiliation:
European Southern Observatory, Paranal, Chile
Rosalba Perna
Affiliation:
Princeton University, Princeton, USA

Abstract

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During 2002–2003 the number of IR-identified counterparts to the Anomalous X-ray Pulsars (AXPs) has grown to four (4U 0142+61, IE 2259+586, IE 1048.1−5937 and RXS J170849−400910) out of the six objects (plus two candidates) known in this class. More importantly, some new common characteristics have been identified, such as IR variability, IR flattening in the broad-band energy spectrum, X-ray spectral variability as a function of pulse phase (which are not predicted by the magnetar model), and X-ray bursts (which cannot be explained in terms of standard accretion models). We present the results obtained from an extensive multi-wavelength observational campaign carried out with the NTT and CFHT for the optical/IR bands, and XMM and Chandra (plus BeppoSAX archival data) in X-rays. Based on these results and those reported in the literature, the IR-to-X-ray emission of AXPs is compared.

Type
Part 5: Magnetars, Central Compact Objects and Isolated Neutron Stars
Information
Symposium - International Astronomical Union , Volume 218: Young Neutrons Stars and their Environments , 2004 , pp. 247 - 250
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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