A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Black hole spin-orbit misalignment in the x-ray binary MAXI J1820+070
Tekijät: Poutanen Juri, Veledina Alexandra, Berdyugin Andrei V., Berdyugina Svetlana V., Jermak Helen, Jonker Peter G., Kajava Jari J. E., Kosenkov Ilia A., Kravtsov Vadim, Piirola Vilppu, Shrestha Manisha, Torres Manuel A. P., Tsygankov Sergey S.
Kustantaja: AMER ASSOC ADVANCEMENT SCIENCE
Julkaisuvuosi: 2022
Journal: Science
Tietokannassa oleva lehden nimi: SCIENCE
Lehden akronyymi: SCIENCE
Vuosikerta: 375
Numero: 6583
Aloitussivu: 874
Lopetussivu: 876
Sivujen määrä: 29
ISSN: 0036-8075
eISSN: 1095-9203
DOI: https://doi.org/10.1126/science.abl4679
Verkko-osoite: https://www.science.org/doi/10.1126/science.abl4679
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/175010152
Preprintin osoite: https://arxiv.org/abs/2109.07511v1
The observational signatures of black holes in x-ray binary systems depend on their masses, spins, accretion rate, and the misalignment angle between the black hole spin and the orbital angular momentum. We present optical polarimetric observations of the black hole x-ray binary MAXI J1820+070, from which we constrain the position angle of the binary orbital. Combining this with previous determinations of the relativistic jet orientation. which traces the black hole spin, and the inclination of the orbit, we determine a lower limit of 40 degrees on the spin-orbit misalignment angle. The misalignment must originate from either the binary evolution or black hole formation stages. If other x-ray binaries have similarly large misalignments, these would bias measurements of black hole masses and spins from x-ray observations.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
