期刊
ASTROPHYSICAL JOURNAL
卷 773, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/773/2/91
关键词
binaries: close; gravitational waves; methods: data analysis; pulsars: general; pulsars: individual (PSR J2007+2722); surveys
资金
- CFI
- CIFAR
- FQRNT
- MPG
- NAIC
- NRAO
- NSERC
- NSF
- STFC
- STFC [ST/J001562/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Physics [0955929] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0806942] Funding Source: National Science Foundation
- Division Of Human Resource Development
- Direct For Education and Human Resources [1242090] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1104902, 1104617] Funding Source: National Science Foundation
- Office Of Internatl Science &Engineering
- Office Of The Director [0968296] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/J001562/1] Funding Source: researchfish
Einstein@Home aggregates the computer power of hundreds of thousands of volunteers from 193 countries, to search for new neutron stars using data from electromagnetic and gravitational-wave detectors. This paper presents a detailed description of the search for new radio pulsars using Pulsar ALFA survey data from the Arecibo Observatory. The enormous computing power allows this search to cover a new region of parameter space; it can detect pulsars in binary systems with orbital periods as short as 11 minutes. We also describe the first Einstein@Home discovery, the 40.8 Hz isolated pulsar PSR J2007+2722, and provide a full timing model. PSR J2007+2722's pulse profile is remarkably wide with emission over almost the entire spin period. This neutron star is most likely a disrupted recycled pulsar, about as old as its characteristic spin-down age of 404 Myr. However, there is a small chance that it was born recently, with a low magnetic field. If so, upper limits on the X-ray flux suggest but cannot prove that PSR J2007+2722 is at least similar to 100 kyr old. In the future, we expect that the massive computing power provided by volunteers should enable many additional radio pulsar discoveries.
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