Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
Zur Ablage hinzufügen
 Lokale TagsFreigabegeschichteDetailsÜbersicht
  The origin of the first neutron star - neutron star merger

Belczynski, K., Askar, A., Arca-Sedda, M., Chruslinska, M., Donnari, M., Giersz, M., et al. (2018). The origin of the first neutron star - neutron star merger. Astronomy and Astrophysics, 615.

Item is

 

einblenden: alle ausblenden: alle

Basisdaten

einblenden: ausblenden:
Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0005-CF02-0 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-CF03-F
Genre: Zeitschriftenartikel

Externe Referenzen

einblenden:
ausblenden:
externe Referenz:
https://ui.adsabs.harvard.edu/abs/2018A&A...615A..91B (beliebiger Volltext)
Beschreibung:
-
OA-Status:

Urheber

einblenden:
ausblenden:
 Urheber:
Belczynski, K.1, Autor
Askar, A.1, Autor
Arca-Sedda, M.1, Autor
Chruslinska, M.1, Autor
Donnari, M.1, Autor
Giersz, M.1, Autor
Benacquista, M.1, Autor
Spurzem, R.1, Autor
Jin, D.1, Autor
Wiktorowicz, G.1, Autor
Belloni, D.1, Autor
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

Inhalt

einblenden:
ausblenden:
Schlagwörter: gravitational waves Astrophysics - High Energy Astrophysical Phenomena
 Zusammenfassung: The first neutron star-neutron star (NS-NS) merger was discovered on August 17, 2017 through gravitational waves (GW170817) and followed with electromagnetic observations. This merger was detected in an old elliptical galaxy with no recent star formation. We perform a suite of numerical calculations to understand the formation mechanism of this merger. We probe three leading formation mechanisms of double compact objects: classical isolated binary star evolution, dynamical evolution in globular clusters, and nuclear cluster formation to test whether they are likely to produce NS-NS mergers in old host galaxies. Our simulations with optimistic assumptions show current NS-NS merger rates at the level of 10-2 yr-1 from binary stars, 5 × 10-5 yr-1 from globular clusters, and 10-5 yr-1 from nuclear clusters for all local elliptical galaxies (within 100 Mpc3). These models are thus in tension with the detection of GW170817 with an observed rate of 1.5-1.2+3.2 yr-1 (per 100 Mpc3; LIGO/Virgo 90% credible limits). Our results imply that either the detection of GW170817 by LIGO/Virgo at their current sensitivity in an elliptical galaxy is a statistical coincidence; that physics in at least one of our three models is incomplete in the context of the evolution of stars that can form NS-NS mergers; or that another very efficient (unknown) formation channel with a long delay time between star formation and merger is at play.

Details

einblenden:
ausblenden:
Sprache(n):
 Datum: 2018
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: -
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Astronomy and Astrophysics
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 615 Artikelnummer: - Start- / Endseite: - Identifikator: -