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Titolo: The compact central object in the RX J0852.0-4622 supernova remnant
Autore: Pavlov, GG; Sanwal, D; Kiziltan, B; Garmire, GP;
- Indirizzi:
- 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: 559,
anno: 2001,
parte:, 2
pagine: L131 - L134
- SICI:
- 0004-637X(20011001)559:2<L131:TCCOIT>2.0.ZU;2-S
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- CCD IMAGING SPECTROMETER; TI-44;
- Keywords:
- ISM : individual (RX J0852.0-4622); stars : neutron; X-rays : individual (CXOU J085201.4-461753);
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 19
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Pavlov, GG Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA16802 USA Penn State Univ University Pk PA USA 16802 ity Pk, PA16802 USA
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- Citazione:
- G.G. Pavlov et al., "The compact central object in the RX J0852.0-4622 supernova remnant", ASTROPHYS J, 559(2), 2001, pp. L131-L134
Abstract
The central region of the recently discovered supernova remnant (SNR) RX J0852.0-4622 was observed with the Advanced CCD Imaging Spectrometer detector aboard the Chandra X-Ray Observatory. We found only one relatively brightsource, about 4' north of the SNR center, with a flux of ergs s(-1) cm(-2)in the 0.5-10 10 keV band. The position of this pointlike source, CXOU J085201.4-461753, rules out its association with the two bright stars in the field, HD 76060 and Wray 16-30. Observations of the field with the Cerro Tololo Inter-American Observatory 0.9 m telescope show a star (R approximate to 17, B approximate to 19) at about 2."4 from the nominal X-ray position. We consider association of this star with the X-ray source unlikely and estimate a limiting magnitude of the optical counterpart as B greater than or equal to 22.5 and R greater than or equal to 21.0. Based on the X-ray-to-optical flux ratio, we argue that the X-ray source is likely the compact remnant of the supernova explosion that created the RX J0852.0-4622 SNR. The observed X-ray spectrum of the source is softer than spectra of magnetosphericradiation of rotation-powered pulsars, but it is harder than spectra of cooling neutron stars emitting thermal radiation from the entire surface, similar to the central compact source of the Cas A SNR. We suggest that CXOU J085201.4-461753 belongs to the growing family of radio-quiet compact central sources, presumably neutron stars, recently discovered in a number of SNRs.
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Documento generato il 25/05/13 alle ore 09:56:45