An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Israel GL, Belfiore A, Stella L, Esposito P, Casella P, De Luca A, Marelli M, Papitto A, Perri M, Puccetti S, Rodriguez Castillo GA, Salvetti D, Tiengo A, Zampieri L, D'Agostino D, Greiner J, Haberl F, Novara G, Salvaterra R, Turolla R, Watson M, Wilms J, Wolter A
Zeitschrift: Science
Verlag: AMER ASSOC ADVANCEMENT SCIENCE
Jahr der Veröffentlichung: 2017
Band: 355
Heftnummer: 6327
Seitenbereich: 817-819
ISSN: 0036-8075
eISSN: 1095-9203


Abstract

Ultraluminous x-ray sources (ULXs) in nearby galaxies shine brighter than any x-ray source in our Galaxy. ULXs are usually modeled as stellar-mass black holes (BHs) accreting at very high rates or intermediate-mass BHs. We present observations showing that NGC 5907 ULX is instead an x-ray accreting neutron star (NS) with a spin period evolving from 1.43 seconds in 2003 to 1.13 seconds in 2014. It has an isotropic peak luminosity of similar to 1000 times the Eddington limit for a NS at 17.1 megaparsec. Standard accretion models fail to explain its luminosity, even assuming beamed emission, but a strong multipolar magnetic field can describe its properties. These findings suggest that other extreme ULXs (x-ray luminosity >= 1041 erg second(-1)) might harbor NSs.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Wilms, Jörn Prof. Dr.
Professur für Astronomie und Astrophysik


Einrichtungen weiterer Autorinnen und Autoren

Consiglio Nazionale delle Ricerche (CNR)
Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
University of Leicester
University of Padua / Universita degli Studi di Padova


Zitierweisen

APA:
Israel, G.L., Belfiore, A., Stella, L., Esposito, P., Casella, P., De Luca, A.,... Wolter, A. (2017). An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907. Science, 355(6327), 817-819. https://dx.doi.org/10.1126/science.aai8635

MLA:
Israel, Gian Luca, et al. "An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907." Science 355.6327 (2017): 817-819.

BibTeX: 

Zuletzt aktualisiert 2019-17-06 um 08:53