Testing the constancy of the gravitational constant using helioseismology

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dc.creator Guenther, David B.
dc.creator Krauss, L. M.
dc.creator Demarque, P.
dc.date.accessioned 2013-10-25T19:33:53Z
dc.date.available 2013-10-25T19:33:53Z
dc.date.issued 1998-05-10
dc.identifier.issn 0004-637X
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/25301
dc.description Publisher's version/PDF
dc.description.abstract We compare the p-mode oscillation spectra of solar models, constructed under the assumption that the universal gravitation constant G varied monotonically over the course of the solar lifetime, to the most recent solar p-mode frequency observations from the Global Oscillation Network Group (GONG) instrument and Birmingham Solar Oscillation Network (BiSON). The GONG instrument consists of six telescopes spread over different longitude around the Earth, each recording, once every minute, Doppler shift images of the Sun's surface. BiSON also consists of a network of six telescopes specifcally designed to observe low-l p-modes. We find that only those solar models constructed with (1/G)dG/dt [less than or equal to] ~1.6] x 10[superscript -12] yr[superscript -1] are consistent with the observations. This constraint not only probes G over cosmic time, it is stronger by almost one order of magnitude than constraints on the current maximum time variation coming from radar ranging and binary pulsar timing measurements. en_CA
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dc.description.provenance Made available in DSpace on 2013-10-25T19:33:53Z (GMT). No. of bitstreams: 1 guenther_d_b_article_1998.pdf: 175298 bytes, checksum: 9120fd8565b3eb07ba9a63ddd3f72027 (MD5) Previous issue date: 1998-05-10 en
dc.language.iso en en_CA
dc.publisher American Astronomical Society
dc.relation.uri http://dx.doi.org/10.1086/305567
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh Gravitation
dc.subject.lcsh Sun -- Gravity
dc.subject.lcsh Sun -- Evolution
dc.subject.lcsh Solar oscillations
dc.title Testing the constancy of the gravitational constant using helioseismology en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Astrophysical Journal 498(2), 871-876. (1998)
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Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: http://dx.doi.org/10.1086/305567
 
 

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