Sökning: id:"swepub:oai:research.chalmers.se:7627bf8b-8f79-4c40-a05b-80d0c82a1f9d" >
The Radio Parallax ...
The Radio Parallax of the Crab Pulsar: A First VLBI Measurement Calibrated with Giant Pulses
-
- Lin, Rebecca (författare)
- University of Toronto
-
- van Kerkwijk, Marten H. (författare)
- University of Toronto
-
- Kirsten, Franz, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
visa fler...
-
- Pen, U. L. (författare)
- University of Toronto,Institut canadien d'astrophysique théorique,Canadian Institute for Theoretical Astrophysics,Perimeter Institute for Theoretical Physics,Academia Sinica Taiwan
-
- Deller, A. (författare)
- ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav),Swinburne University of Technology
-
visa färre...
-
(creator_code:org_t)
- 2023
- 2023
- Engelska.
-
Ingår i: Astrophysical Journal. - 1538-4357 .- 0004-637X. ; 952:2
- Relaterad länk:
-
https://research.cha... (primary) (free)
-
visa fler...
-
https://research.cha...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- We use four observations with the European very long baseline interferometry (VLBI) network to measure the first precise radio parallax of the Crab Pulsar. We found two in-beam extragalactic sources just outside the Crab Nebula, with one bright enough to use as a background reference source in our data. We use the Crab Pulsar’s giant pulses to determine fringe and bandpass calibration solutions, which greatly improved the sensitivity and reliability of our images and allowed us to determine precise positional offsets between the pulsar and the background source. From those offsets, we determine a parallax of π = 0.53 ± 0.06 mas and proper motion of (μ α , μ δ ) = (−11.34 ± 0.06, 2.65 ± 0.14) mas yr−1, yielding a distance of d = 1.90 − 0.18 + 0.22 kpc and transverse velocity of v ⊥ = 104 − 11 + 13 km s − 1 . These results are consistent with the Gaia 3 measurements, and open up the possibility of far more accurate astrometry with further VLBI observations.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas