Are there planets around the pulsar PSR B0329+54?

Citation
M. Konacki et al., Are there planets around the pulsar PSR B0329+54?, ASTROPHYS J, 519(1), 1999, pp. L81-L84
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004-637X → ACNP
Volume
519
Issue
1
Year of publication
1999
Part
2
Pages
L81 - L84
Database
ISI
SICI code
0004-637X(19990701)519:1<L81:ATPATP>2.0.ZU;2-A
Abstract
Using the pulse arrival time measurements of the pulsar PSR B0329+54 made b etween 1994 and 1998 with the 100 m Effelsberg and the 32 m Torun radio tel escopes supplemented with the archival JPL data, we demonstrate that the pl anets suggested to orbit this similar to 5 x 10(6) yr old object are unlike ly to be real. The previously proposed timing models, including 3 and 16.8 yr orbits of terrestrial-mass planets, fail to predict the pulse arrival ti mes at later epochs. If this pulsar has planetary companions, the remaining possibilities include low-mass objects that are below the current detectio n threshold, multiple terrestrial-mass planets in orbits whose superpositio n could produce the timing noiselike effects, and any planets with orbital periods significantly exceeding the 30 yr data span. However, it is likely that the observed variations in timing residuals of PSR B0329+54 are caused by spin irregularities that are intrinsic to this relatively young neutron star.