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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 710072.0, MPI für Astronomie / Publikationen_mpia
Herschel and Spitzer observations of slowly rotating, nearby isolated neutron stars
Authors:Posselt, B.; Pavlov, G. G.; Popov, S.; Wachter, S.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:The Astrophysical Journal Supplement Series
Issue / Number:1
Start Page:id. 3 (18 pp)
Audience:Not Specified
Abstract / Description:Supernova fallback disks around neutron stars have been suspected to influence the evolution of the diverse neutron star populations. Slowly rotating neutron stars are the most promising places to find such disks. Searching for the cold and warm debris of old fallback disks, we carried out Herschel PACS (70 mum, 160 mum) and Spitzer IRAC (3.6 mum, 4.5 mum) observations of eight slowly rotating (P &ap; 3-11 s) nearby (<1 kpc) isolated neutron stars. Herschel detected 160 mum emission (>5sigma) at locations consistent with the positions of the neutron stars RX J0806.4-4123 and RX J2143.0+0654. No other significant infrared emission was detected from the eight neutron stars. We estimate probabilities of 63%, 33%, and 3% that, respectively, none, one, or both Herschel PACS 160 mum detections are unrelated excess sources due to background source confusion or an interstellar cirrus. If the 160 mum emission is indeed related to cold (10-22 K) dust around the neutron stars, this dust is absorbing and re-emitting ~10% to ~20% of the neutron stars' X-rays. Such high efficiencies would be at least three orders of magnitude larger than the efficiencies of debris disks around nondegenerate stars. While thin dusty disks around the neutron stars can be excluded as counterparts of the 160 mum emission, dusty asteroid belts constitute a viable option.
Free Keywords:pulsars: individual: RX J0420.0-5022 RXJ0720.4-3125 RXJ0806.4-4123 RXJ1308.6+2127 RXJ1605.3+3249 RXJ1856.5-3754 PSRJ1848-1952 RXJ2143.0+0654; stars: neutron
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0067-0049 %R 10.1088/0067-0049/215/1/3
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