Discovery of Extended Infrared Emission around the Neutron Star RXJ0806.4–4123
AffiliationUniv Arizona, Steward Observ
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationB. Posselt et al 2018 ApJ 865 1
Rights© 2018. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractFollowing up on a faint detection of a near-infrared (NIR) source at the position of the X-ray thermal isolated neutron star RXJ0806.4-4123, we present new Hubble Space Telescope observations in the H-band. The NIR source is unambiguously detected with a Vega magnitude of 23.7 +/- 0.2 (flux density of 0.40 +/- 0.06 mu Jy at lambda = 1.54 mu m). The source position is coincident with the neutron star position, and the implied NIR flux is strongly in excess of what one would expect from an extrapolation of the optical-UV spectrum of RXJ0806.4-4123. The NIR source is extended, with a size of at least 0 8, and shows some asymmetry. The conservative upper limit on the flux contribution of a point source is 50%. Emission from gas and dust in the ambient diffuse interstellar medium can be excluded as a cause for the extended emission. The source parameters are consistent with an interpretation as either the first NIR-only detected pulsar wind nebula or the first resolved disk around an isolated neutron star.
VersionFinal published version
SponsorsNASA through a grant from the Space Telescope Science Institute under NASA [NAS 5-26555, 14745]; TUBITAK (The Scientific and Technological Research Council of Turkey) [117F144]; Sabanci University; National Science Foundation Astronomy and Astrophysics Fellowship grant [AST-1701546]; Pennsylvania State University; Eberly College of Science; Pennsylvania Space Grant Consortium; Gaia Multilateral Agreement