Polarized X-rays from windy accretion in Cygnus X-1
J Poutanen, A Veledina… - The Astrophysical …, 2023 - iopscience.iop.org
Recent X-ray polarimetric data on the prototypical black hole X-ray binary Cyg X-1 from the
Imaging X-ray Polarimetry Explorer present tight constraints on accretion geometry in the …
Imaging X-ray Polarimetry Explorer present tight constraints on accretion geometry in the …
Discovery of X-Ray Polarization from the Black Hole Transient Swift J1727. 8− 1613
A Veledina, F Muleri, M Dovčiak… - The Astrophysical …, 2023 - iopscience.iop.org
We report the first detection of the X-ray polarization of the bright transient Swift J1727. 8−
1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the …
1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the …
The luminous, hard state can't be MAD
We present a straightforward argument for why the luminous, hard state of black hole X-ray
binaries (BHXRBs) cannot always be associated with a magnetically arrested accretion disc …
binaries (BHXRBs) cannot always be associated with a magnetically arrested accretion disc …
Tossing black hole spin axes
TM Tauris - The Astrophysical Journal, 2022 - iopscience.iop.org
The detection of double black hole (BH+ BH) mergers provides a unique possibility to
understand their physical properties and origin. To date, the LIGO–Virgo–KAGRA network of …
understand their physical properties and origin. To date, the LIGO–Virgo–KAGRA network of …
Analysis of the reflection spectra of MAXI J1535-571 in the hard and intermediate states
Y Dong, Z Liu, Y Tuo, JF Steiner, M Ge… - Monthly Notices of …, 2022 - academic.oup.com
We report results on the joint-fit of the NuSTAR and HXMT data for the black hole X-ray
binary candidate MAXI J1535-571. The observations were obtained in 2017 when the …
binary candidate MAXI J1535-571. The observations were obtained in 2017 when the …
Evidence for a Black Hole Spin–Orbit Misalignment in the X-Ray Binary Cyg X-1
AA Zdziarski, A Veledina, M Szanecki… - The Astrophysical …, 2023 - iopscience.iop.org
Recently, the accretion geometry of the black hole X-ray binary Cyg X-1 was probed with the
X-ray polarization. The position angle of the X-ray-emitting flow was found to be aligned with …
X-ray polarization. The position angle of the X-ray-emitting flow was found to be aligned with …
High-density reflection spectroscopy of black hole X-ray binaries in the hard state
We present a high-density relativistic reflection analysis of 21 spectra of six black hole X-ray
binaries in the hard state with data from NuSTAR and Swift. We find that 76% of the …
binaries in the hard state with data from NuSTAR and Swift. We find that 76% of the …
Continuum emission from within the plunging region of black hole discs
The thermal continuum emission observed from accreting black holes across X-ray bands
has the potential to be leveraged as a powerful probe of the mass and spin of the central …
has the potential to be leveraged as a powerful probe of the mass and spin of the central …
Peering into the tilted heart of Cyg X-1 with high-precision optical polarimetry
V Kravtsov, A Veledina, AV Berdyugin… - Astronomy & …, 2023 - aanda.org
We present high-precision optical polarimetric observations of the black hole X-ray binary
Cygnus X-1 that span several cycles of its 5.6-day orbital period. The week-long …
Cygnus X-1 that span several cycles of its 5.6-day orbital period. The week-long …
The Donor of the Black Hole X-Ray Binary MAXI J1820+ 070
J Mikołajewska, AA Zdziarski, J Ziółkowski… - The Astrophysical …, 2022 - iopscience.iop.org
We estimate the parameters of the donor of the accreting black hole binary MAXI J1820+
070. The measured values of the binary period, rotational and radial velocities, and …
070. The measured values of the binary period, rotational and radial velocities, and …