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Titolo: PSR J2229+6114: Discovery of an energetic young pulsar in the error box ofthe EGRET source 3EG J2227+6122
Autore: Halpern, JP; Camilo, F; Gotthelf, EV; Helfand, DJ; Kramer, M; Lyne, AG; Leighly, KM; Eracleous, M;
- Indirizzi:
- Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA Columbia Univ New York NY USA 10027 Astrophys Lab, New York, NY 10027 USA Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England Univ Manchester Macclesfield Cheshire England SK11 9DL Cheshire, England Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA Univ Oklahoma Norman OK USA 73019 ept Phys & Astron, Norman, OK 73019 USA Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA16802 USA Penn State Univ University Pk PA USA 16802 25, University Pk, PA16802 USA
- Titolo Testata:
- ASTROPHYSICAL JOURNAL
fascicolo: 2,
volume: 552,
anno: 2001,
parte:, 2
pagine: L125 - L128
- SICI:
- 0004-637X(20010510)552:2<L125:PJDOAE>2.0.ZU;2-Y
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- RAY;
- Keywords:
- gamma rays : observations; pulsars : individual (PSR J2229+6114); supernova remnants;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 13
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Halpern, JP Columbia Univ, Columbia Astrophys Lab, 550 W 120th St, New York, NY 10027 USA Columbia Univ 550 W 120th St New York NY USA 10027 Y 10027 USA
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- Citazione:
- J.P. Halpern et al., "PSR J2229+6114: Discovery of an energetic young pulsar in the error box ofthe EGRET source 3EG J2227+6122", ASTROPHYS J, 552(2), 2001, pp. L125-L128
Abstract
We report the detection of radio and X-ray pulsations at a period of 51.6 ms from the X-ray source RX/AX J2229.0+6114 in the error box of the EGRET source 3EG J2227+6122. An ephemeris derived from a single ASCA observation and multiple epochs at 1412 MHz from Jodrell Bank indicates steady spin-downwith (P) over dot = 7.83 x 10(-14) s s(-1). From the measured P and (P) over dot , we derive spin-down power (E) over dot = 2.2 x 10(37) ergs s(-1), magnetic field B-P = 2.0 x 10(12) G, and characteristic age P/2(P) over dot= 10,460 yr. An image from the Chandra X-Ray Observatory reveals a point source surrounded by centrally peaked diffuse emission that is contained within an incomplete radio shell. We assign the name G106.6+2.9 to this new supernova remnant, which is evidently a pulsar wind nebula. For a distance of3 kpc estimated from X-ray absorption, the ratio of X-ray luminosity to spin-down power is approximate to8 x 10(-5), smaller than that of most pulsars but similar to the Vela pulsar. If PSR J2229+6114 is the counterpart of 3EG J2227+6122, then its efficiency of gamma -ray production, if isotropic, is 0.016 (d/3 kpc)(2). It obeys an established trend of gamma -ray efficiency among known gamma -ray pulsars, which, in combination with the demonstrated absence of any other plausible counterpart for 3EG J2227+6122, makes the identification compelling. If confirmed, this identification bolsters thepulsar model for unidentified Galactic EGRET sources.
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Documento generato il 24/05/13 alle ore 16:45:04