Semantic Scholar Open Access 2014 552 sitasi

An ultraluminous X-ray source powered by an accreting neutron star

M. Bachetti F. Harrison D. Walton B. Grefenstette D. Chakrabarty +80 lainnya

Lihat Sumber DOI

Abstrak

The majority of ultraluminous X-ray sources are point sources that are spatially offset from the nuclei of nearby galaxies and whose X-ray luminosities exceed the theoretical maximum for spherical infall (the Eddington limit) onto stellar-mass black holes. Their X-ray luminosities in the 0.5–10 kiloelectronvolt energy band range from 1039 to 1041 ergs per second. Because higher masses imply less extreme ratios of the luminosity to the isotropic Eddington limit, theoretical models have focused on black hole rather than neutron star systems. The most challenging sources to explain are those at the luminous end of the range (more than 1040 ergs per second), which require black hole masses of 50–100 times the solar value or significant departures from the standard thin disk accretion that powers bright Galactic X-ray binaries, or both. Here we report broadband X-ray observations of the nuclear region of the galaxy M82 that reveal pulsations with an average period of 1.37 seconds and a 2.5-day sinusoidal modulation. The pulsations result from the rotation of a magnetized neutron star, and the modulation arises from its binary orbit. The pulsed flux alone corresponds to an X-ray luminosity in the 3–30 kiloelectronvolt range of 4.9 × 1039 ergs per second. The pulsating source is spatially coincident with a variable source that can reach an X-ray luminosity in the 0.3–10 kiloelectronvolt range of 1.8 × 1040 ergs per second. This association implies a luminosity of about 100 times the Eddington limit for a 1.4-solar-mass object, or more than ten times brighter than any known accreting pulsar. This implies that neutron stars may not be rare in the ultraluminous X-ray population, and it challenges physical models for the accretion of matter onto magnetized compact objects.

Topik & Kata Kunci

Medicine Physics

Penulis (85)

M. Bachetti

F. Harrison

D. Walton

B. Grefenstette

D. Chakrabarty

F. Furst

D. Barret

A. Beloborodov

S. Boggs

F. Christensen

W. Craig

A. Fabian

C. Hailey

A. Hornschemeier

V. Kaspi

S. Kulkarni

T. Maccarone

J. Miller

V. Rana

D. Stern

S. Tendulkar

J. Tomsick

N. Webb

W. W. Z. U. D. Toulouse

UPS-OMP

Irap

F. Toulouse

F. Cnrs

Institut de Recherche en Astrophysique et Plan'etologie

A. Roche

BP 44346

4. 31028ToulouseCedex

F. Toulouse

F. M. F. Astrophysics

1. E. C. Boulevard

C. I. O. Technology.

Pasadena

California 91125

Usa Harvard-Smithsonian Center for Astrophysics

Space Research

M. I. O. Technology

Cambridge

MA 02139

U. P. Department

Columbia University. 538 W 120th Street

New York.

NY 10027

Usa Space Sciences Laboratory

U. California

Berkeley

CA 94720

Usa Dtu Space

National Space Institute

T. Denmark

Elektrovej 327

DK-2800 Lyngby

D. L. L. N. Laboratory

Livermore

CA 94550

USA. Department of Astronomy

U. Cambridge

Madingley Road

Cambridge CB3 0HA

UK Columbia Astrophysics Laboratory

Columbia University

Usa Nasa Marshall Space Flight Center

Greenbelt

MD 20771

USA. Department of physics

M. University

Montreal

Quebec

H3A 2T8

Canada Department of Physics

Texas Tech University

Lubbock

TX 79409

USA. Department of Astronomy

U. Michigan

500 Church Street

A. Arbor

MI 48109-1042

Usa Jet Propulsion Laboratory

CA 91109

Usa

Format Sitasi

APA MLA BibTeX

Bachetti, M., Harrison, F., Walton, D., Grefenstette, B., Chakrabarty, D., Furst, F. et al. (2014). An ultraluminous X-ray source powered by an accreting neutron star. https://doi.org/10.1038/nature13791

@article{bachetti2014, author = {M. Bachetti and F. Harrison and D. Walton and B. Grefenstette and D. Chakrabarty and F. Furst and D. Barret and A. Beloborodov and S. Boggs and F. Christensen and W. Craig and A. Fabian and C. Hailey and A. Hornschemeier and V. Kaspi and S. Kulkarni and T. Maccarone and J. Miller and V. Rana and D. Stern and S. Tendulkar and J. Tomsick and N. Webb and W. W. Z. U. D. Toulouse and UPS-OMP and Irap and F. Toulouse and F. Cnrs and Institut de Recherche en Astrophysique et Plan'etologie and A. Roche and BP 44346 and 4. 31028ToulouseCedex and F. Toulouse and F. M. F. Astrophysics and 1. E. C. Boulevard and C. I. O. Technology. and Pasadena and California 91125 and Usa Harvard-Smithsonian Center for Astrophysics and Space Research and M. I. O. Technology and Cambridge and MA 02139 and U. P. Department and Columbia University. 538 W 120th Street and New York. and NY 10027 and Usa Space Sciences Laboratory and U. California and Berkeley and CA 94720 and Usa Dtu Space and National Space Institute and T. Denmark and Elektrovej 327 and DK-2800 Lyngby and D. L. L. N. Laboratory and Livermore and CA 94550 and USA. Department of Astronomy and U. Cambridge and Madingley Road and Cambridge CB3 0HA and UK Columbia Astrophysics Laboratory and Columbia University and Usa Nasa Marshall Space Flight Center and Greenbelt and MD 20771 and USA. Department of physics and M. University and Montreal and Quebec and H3A 2T8 and Canada Department of Physics and Texas Tech University and Lubbock and TX 79409 and USA. Department of Astronomy and U. Michigan and 500 Church Street and A. Arbor and MI 48109-1042 and Usa Jet Propulsion Laboratory and CA 91109 and Usa}, title = {An ultraluminous X-ray source powered by an accreting neutron star}, year = {2014}, journal = {Semantic Scholar}, doi = {10.1038/nature13791}, url = {https://www.semanticscholar.org/paper/ba1ff7e4734b63757cb8da1fc6c25aa26883936d}, }

Akses Cepat

Lihat di Sumber doi.org/10.1038/nature13791

Informasi Jurnal

Tahun Terbit: 2014
Bahasa: en
Total Sitasi: 552×
Sumber Database: Semantic Scholar
DOI: 10.1038/nature13791
Akses: Open Access ✓