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Verfasst von:Smartt, Stephen [VerfasserIn]   i
 Kromer, Markus [VerfasserIn]   i
Titel:A kilonova as the electromagnetic counterpart to a gravitational-wave source
Verf.angabe:S.J. Smartt, T.-W. Chen, A. Jerkstrand, M. Coughlin, E. Kankare, S.A. Sim, M. Fraser, C. Inserra, K. Maguire, K.C. Chambers, M.E. Huber, T. Krühler, G. Leloudas, M. Magee, L.J. Shingles, K.W. Smith, D.R. Young, J. Tonry, R. Kotak, A. Gal-Yam, J.D. Lyman, D.S. Homan, C. Agliozzo, J.P. Anderson, C.R. Angus, C. Ashall, C. Barbarino, F.E. Bauer, M. Berton, M.T. Botticella, M. Bulla, J. Bulger, G. Cannizzaro, Z. Cano, R. Cartier, A. Cikota, P. Clark, A. De Cia, M. Della Valle, L. Denneau, M. Dennefeld, L. Dessart, G. Dimitriadis, N. Elias-Rosa, R.E. Firth, H. Flewelling, A. Flörs, A. Franckowiak, C. Frohmaier, L. Galbany, S. González-Gaitán, J. Greiner, M. Gromadzki, A. Nicuesa Guelbenzu, C.P. Gutiérrez, A. Hamanowicz, L. Hanlon, J. Harmanen, K.E. Heintz, A. Heinze, M.-S. Hernandez, S.T. Hodgkin, I.M. Hook, L. Izzo, P.A. James, P.G. Jonker, W.E. Kerzendorf, S. Klose, Z. Kostrzewa-Rutkowska, M. Kowalski, M. Kromer, H. Kuncarayakti, A. Lawrence, T.B. Lowe, E.A. Magnier, I. Manulis, A. Martin-Carrillo, S. Mattila, O. McBrien, A. Müller, J. Nordin, D. O’Neill, F. Onori, J.T. Palmerio, A. Pastorello, F. Patat, G. Pignata, Ph Podsiadlowski, M.L. Pumo, S.J. Prentice, A. Rau, A. Razza, A. Rest, T. Reynolds, R. Roy, A.J. Ruiter, K.A. Rybicki, L. Salmon, P. Schady, A.S.B. Schultz, T. Schweyer, I.R. Seitenzahl, M. Smith, J. Sollerman, B. Stalder, C.W. Stubbs, M. Sullivan, H. Szegedi, F. Taddia, S. Taubenberger, G. Terreran, B. van Soelen, J. Vos, R.J. Wainscoat, N.A. Walton, C. Waters, H. Weiland, M. Willman, P. Wiseman, D.E. Wright, Ł Wyrzykowski, O. Yaron
E-Jahr:2017
Jahr:16 October 2017
Umfang:5 S.
Teil:volume:551
 year:2017
 number:7678
 pages:75-79
 extent:5
Fussnoten:Gesehen am 24.09.2018
Titel Quelle:Enthalten in: Nature <London>
Ort Quelle:London [u.a.] : Nature Publ. Group, 1869
Jahr Quelle:2017
Band/Heft Quelle:551(2017), 7678, Seite 75-79
ISSN Quelle:1476-4687
Abstract:Gravitational waves were discovered with the detection of binary black-hole mergers1 and they should also be detectable from lower-mass neutron-star mergers. These are predicted to eject material rich in heavy radioactive isotopes that can power an electromagnetic signal. This signal is luminous at optical and infrared wavelengths and is called a kilonova2,3,4,5. The gravitational-wave source GW170817 arose from a binary neutron-star merger in the nearby Universe with a relatively well confined sky position and distance estimate6. Here we report observations and physical modelling of a rapidly fading electromagnetic transient in the galaxy NGC 4993, which is spatially coincident with GW170817 and with a weak, short γ-ray burst7,8. The transient has physical parameters that broadly match the theoretical predictions of blue kilonovae from neutron-star mergers. The emitted electromagnetic radiation can be explained with an ejected mass of 0.04 ± 0.01 solar masses, with an opacity of less than 0.5 square centimetres per gram, at a velocity of 0.2 ± 0.1 times light speed. The power source is constrained to have a power-law slope of −1.2 ± 0.3, consistent with radioactive powering from r-process nuclides. (The r-process is a series of neutron capture reactions that synthesise many of the elements heavier than iron.) We identify line features in the spectra that are consistent with light r-process elements (atomic masses of 90-140). As it fades, the transient rapidly becomes red, and a higher-opacity, lanthanide-rich ejecta component may contribute to the emission. This indicates that neutron-star mergers produce gravitational waves and radioactively powered kilonovae, and are a nucleosynthetic source of the r-process elements.
DOI:doi:10.1038/nature24303
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: http://dx.doi.org/10.1038/nature24303
 Volltext: https://www.nature.com/articles/nature24303
 DOI: https://doi.org/10.1038/nature24303
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1581243936
Verknüpfungen:→ Zeitung

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