Mostrar el registro sencillo del ítem

dc.contributor.author
Nicholl, M.
dc.contributor.author
Berger, E.
dc.contributor.author
Kasen, D.
dc.contributor.author
Metzger, B. D.
dc.contributor.author
Elias, J.
dc.contributor.author
Briceño, C.
dc.contributor.author
Alexander, K. D.
dc.contributor.author
Blanchard, P. K.
dc.contributor.author
Chornock, R.
dc.contributor.author
Cowperthwaite, P. S.
dc.contributor.author
Eftekhari, T.
dc.contributor.author
Fong, W.
dc.contributor.author
Margutti, R.
dc.contributor.author
Villar, V. A.
dc.contributor.author
Williams, P. K. G.
dc.contributor.author
Brown, W.
dc.contributor.author
Annis, J.
dc.contributor.author
Bahramian, A.
dc.contributor.author
Brout, D.
dc.contributor.author
Brown, D. A.
dc.contributor.author
Chen, H. Y.
dc.contributor.author
Clemens, J.C.
dc.contributor.author
Dennihy, E.
dc.contributor.author
Dunlap, B.
dc.contributor.author
Holz, D.E.
dc.contributor.author
Marchesini, Ezequiel Joaquín
dc.contributor.author
Massaro, F.
dc.contributor.author
Moskowitz, N.
dc.contributor.author
Pelisoli, I.
dc.contributor.author
Rest, A.
dc.contributor.author
Ricci, F.
dc.contributor.author
Sako, M.
dc.contributor.author
Soares Santos, M.
dc.contributor.author
Strader, J.
dc.date.available
2018-08-23T19:51:33Z
dc.date.issued
2017-10
dc.identifier.citation
Nicholl, M.; Berger, E.; Kasen, D.; Metzger, B. D.; Elias, J.; et al.; The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. III. Optical and UV Spectra of a Blue Kilonova from Fast Polar Ejecta; Institute of Physics Publishing; Astrophysical Journal Letters; 848; 2; 10-2017; 1-8
dc.identifier.issn
2041-8213
dc.identifier.uri
http://hdl.handle.net/11336/56893
dc.description.abstract
We present optical and ultraviolet spectra of the first electromagnetic counterpart to a gravitational-wave (GW) source, the binary neutron star merger GW170817. Spectra were obtained nightly between 1.5 and 9.5 days post-merger, using the Southern Astrophysical Research and Magellan telescopes; the UV spectrum was obtained with the Hubble Space Telescope at 5.5 days. Our data reveal a rapidly fading blue component (T ≈ 5500 K at 1.5 days) that quickly reddens; spectra later than ≳4.5 days peak beyond the optical regime. The spectra are mostly featureless, although we identify a possible weak emission line at ∼7900 Å; at t ≲ 4.5 days. The colors, rapid evolution, and featureless spectrum are consistent with a "blue" kilonova from polar ejecta comprised mainly of light r-process nuclei with atomic mass number A ≲ 140. This indicates a sightline within θobs ≲ 45° of the orbital axis. Comparison to models suggests ∼0.03 M o of blue ejecta, with a velocity of . The required lanthanide fraction is ∼10-4, but this drops to <10-5in the outermost ejecta. The large velocities point to a dynamical origin, rather than a disk wind, for this blue component, suggesting that both binary constituents are neutron stars (as opposed to a binary consisting of a neutron star and a black hole). For dynamical ejecta, the high mass favors a small neutron star radius of ≲12 km. This mass also supports the idea that neutron star mergers are a major contributor to r-process nucleosynthesis.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Institute of Physics Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Binaries: Close
dc.subject
Gravitational Waves
dc.subject
Nuclear Reactions, Nucleosynthesis, Abundances
dc.subject
Stars: Neutron
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. III. Optical and UV Spectra of a Blue Kilonova from Fast Polar Ejecta
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-25T16:16:07Z
dc.journal.volume
848
dc.journal.number
2
dc.journal.pagination
1-8
dc.journal.pais
Reino Unido
dc.journal.ciudad
Bristol
dc.description.fil
Fil: Nicholl, M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Berger, E.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Kasen, D.. Lawrence Berkeley National Laboratory; Estados Unidos. University of California at Berkeley; Estados Unidos
dc.description.fil
Fil: Metzger, B. D.. Columbia University In The City Of New York; Estados Unidos
dc.description.fil
Fil: Elias, J.. Southern Astrophysical Research Telescope; Chile
dc.description.fil
Fil: Briceño, C.. Cerro Tololo Inter American Observatory; Chile
dc.description.fil
Fil: Alexander, K. D.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Blanchard, P. K.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Chornock, R.. Ohio University; Estados Unidos
dc.description.fil
Fil: Cowperthwaite, P. S.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Eftekhari, T.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Fong, W.. Northwestern University; Estados Unidos
dc.description.fil
Fil: Margutti, R.. Northwestern University; Estados Unidos
dc.description.fil
Fil: Villar, V. A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Williams, P. K. G.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Brown, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
dc.description.fil
Fil: Annis, J.. Fermi National Accelerator Laboratory; Estados Unidos
dc.description.fil
Fil: Bahramian, A.. Michigan State University; Estados Unidos
dc.description.fil
Fil: Brout, D.. University of Pennsylvania; Estados Unidos
dc.description.fil
Fil: Brown, D. A.. Syracuse University; Estados Unidos
dc.description.fil
Fil: Chen, H. Y.. University of Chicago; Estados Unidos
dc.description.fil
Fil: Clemens, J.C.. University of North Carolina; Estados Unidos
dc.description.fil
Fil: Dennihy, E.. University of North Carolina; Estados Unidos
dc.description.fil
Fil: Dunlap, B.. University of North Carolina; Estados Unidos
dc.description.fil
Fil: Holz, D.E.. University of Chicago; Estados Unidos
dc.description.fil
Fil: Marchesini, Ezequiel Joaquín. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica; Italia. Istituto Nazionale Di Fisica Nucleare; Italia. Università di Torino; Italia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física de Líquidos y Sistemas Biológicos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física de Líquidos y Sistemas Biológicos; Argentina
dc.description.fil
Fil: Massaro, F.. Istituto Nazionale Di Fisica Nucleare; Italia. Istituto Nazionale Di Astrofisica; Italia. Università di Torino; Italia
dc.description.fil
Fil: Moskowitz, N.. Lowell Observatory; Estados Unidos
dc.description.fil
Fil: Pelisoli, I.. Universidade Federal do Rio Grande do Sul; Brasil. University of Warwick; Reino Unido
dc.description.fil
Fil: Rest, A.. Space Telescope Science Institute; Estados Unidos. University Johns Hopkins; Estados Unidos
dc.description.fil
Fil: Ricci, F.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Universita Degli Studi Roma Tre; Italia
dc.description.fil
Fil: Sako, M.. University of Pennsylvania; Estados Unidos
dc.description.fil
Fil: Soares Santos, M.. Fermi National Accelerator Laboratory; Estados Unidos. Brandeis University; Estados Unidos
dc.description.fil
Fil: Strader, J.. Michigan State University; Estados Unidos
dc.journal.title
Astrophysical Journal Letters
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.3847/2041-8213/aa9029
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/2041-8213/aa9029/meta


Archivos asociados

 

Comunidades y colecciones

Mostrar el registro sencillo del ítem