| Name | 078187 |
| Title | A Shifty Spectral Line from CCO PSR J0821-4300: Accretion From a Debris Disk? |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0781870101 |
| DOI | https://doi.org/10.5270/esa-emgihvq |
| Author | European Space Agency |
| Description | We confirm a shifting line feature in the spectrum of PSR J0821-4300, the compact central object (CCO) in Puppis A. This pulsar has the smallest dipole magnetic field (2.8E10 G) inferred for any young neutron star. The spectral feature is consistent with electron cyclotron resonance scattering of surface emitted photons in this magnetic field, however, its strength and energy are unexpectedly variable in time. We propose new measurements to monitor the implied variability of the magnetic field, plausibly indicative of accretion of supernova debris, a likely mechanism for generating an emission line. This observation will also allow simultaneous timing of the pulsar to test for correlated torque noise and to ensure a continued ephemeris to monitor its long-term timing behavior. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2016-11-08T00:29:53Z/2016-11-09T02:16:33Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2018-03-29T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2018, A Shifty Spectral Line From Cco Psr J0821-4300: Accretion From A Debris Diskquestionmark, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-emgihvq |