Phase-Resolved Spectroscopy of Geminga Shows Rotating Hot Spot(s)-Reference-Cited by-同舟云学术

Phase-Resolved Spectroscopy of Geminga Shows Rotating Hot Spot(s)

Published:2004-07-16 Issue:5682 Volume:305 Page:376-379
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Caraveo P. A.¹²³,De Luca A.¹²³,Mereghetti S.¹²³,Pellizzoni A.¹²³,Bignami G. F.¹²³

Affiliation:

1. Istituto di Astrofisica Spaziale e Fisica Cosmica, Consiglio Nazionale delle Ricerche, Via Bassini, 15-20133 Milano, Italy.

2. Centre d'Étude Spatiale des Rayonnements, Centre National de la Recherche Scientifique, Université Paul Sabatier, 9 Avenue du Colonel Roche, Toulouse, France.

3. Università di Pavia, Dipartimento Fisica Teorica e Nucleare, Via Ugo Bassi, 6 Pavia, Italy.

Abstract

Isolated neutron stars are seen in x-rays through their nonthermal and/or surface thermal emissions. X-ray Multimirror Mission–Newton observations of the Geminga pulsar show a 43–electron volt spectrum from the whole neutron star surface, as well as a power-law component above 2 kiloelectron volts. In addition, we have detected a hot (170 electron volts) thermal emission from an ∼60-meter-radius spot on the pulsar's surface. Such a thermal emission, only visible at selected phase intervals, may be coming from polar hot spot(s), long thought to exist as a result of heating from magnetospheric accelerated particles. It may provide the missing link between the x-ray and gamma-ray emission of the pulsar.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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