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Relativistic deflection of background starlight measures the mass of a nearby white dwarf star.
Sahu, Kailash C; Anderson, Jay; Casertano, Stefano; Bond, Howard E; Bergeron, Pierre; Nelan, Edmund P; Pueyo, Laurent; Brown, Thomas M; Bellini, Andrea; Levay, Zoltan G; Sokol, Joshua; Dominik, Martin; Calamida, Annalisa; Kains, Noé; Livio, Mario.
Afiliación
  • Sahu KC; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA. ksahu@stsci.edu.
  • Anderson J; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Casertano S; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Bond HE; Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA.
  • Bergeron P; Département de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC H3C 3J7, Canada.
  • Nelan EP; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Pueyo L; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Brown TM; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Bellini A; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Levay ZG; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Sokol J; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Dominik M; University of St Andrews, School of Physics and Astronomy, North Haugh, St Andrews, KY16 9SS, UK.
  • Calamida A; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Kains N; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA.
  • Livio M; Department of Physics and Astronomy, University of Nevada, Las Vegas, 4505 South Maryland Parkway, Las Vegas, NV 89154, USA.
Science ; 356(6342): 1046-1050, 2017 06 09.
Article en En | MEDLINE | ID: mdl-28592430
ABSTRACT
Gravitational deflection of starlight around the Sun during the 1919 total solar eclipse provided measurements that confirmed Einstein's general theory of relativity. We have used the Hubble Space Telescope to measure the analogous process of astrometric microlensing caused by a nearby star, the white dwarf Stein 2051 B. As Stein 2051 B passed closely in front of a background star, the background star's position was deflected. Measurement of this deflection at multiple epochs allowed us to determine the mass of Stein 2051 B-the sixth-nearest white dwarf to the Sun-as 0.675 ± 0.051 solar masses. This mass determination provides confirmation of the physics of degenerate matter and lends support to white dwarf evolutionary theory.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Science Año: 2017 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
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XML
PubMed Links
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Science Año: 2017 Tipo del documento: Article País de afiliación: Estados Unidos