Tracking the X-ray Polarization of the Black Hole Transient Swift J1727.8-1613 during a State Transition

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Adam Ingram, Niek Bollemeijer, Alexandra Veledina, Michal Dovciak, Juri Poutanen | Summary: We report on an observational campaign on the bright black hole X-ray binary Swift J1727.8$-$1613 centered around five observations by the Imaging X-ray Polarimetry Explorer (IXPE). These observations track for the first time the […]


Continue.. Tracking the X-ray Polarization of the Black Hole Transient Swift J1727.8-1613 during a State Transition

The Strength and Variability of the Helium 10830 Å Triplet in Young Stars, with Implications for Exosphere Detection

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Daniel M. Krolikowski, Adam L. Kraus, Benjamin M. Tofflemire, Caroline V. Morley, Andrew W. Mann | Summary: Young exoplanets trace planetary evolution, particularly the atmospheric mass loss that is most dynamic in youth. However, the high activity level of young stars can mask or mimic the spectroscopic […]


Continue.. The Strength and Variability of the Helium 10830 Å Triplet in Young Stars, with Implications for Exosphere Detection

The High Energy X-ray Probe (HEX-P): resolving the nature of Sgr A* flares, compact object binaries and diffuse X-ray emission in the Galactic Center and beyond

Kavli Affiliate: Melania Nynka | First 5 Authors: Kaya Mori, Gabriele Ponti, Matteo Bachetti, Arash Bodaghee, Jonathan Grindlay | Summary: HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging ($<10"$ FWHM) and broad spectral coverage (0.2-80 keV) with an effective area far superior to current facilities’ (including XMM-Newton and NuSTAR). […]


Continue.. The High Energy X-ray Probe (HEX-P): resolving the nature of Sgr A* flares, compact object binaries and diffuse X-ray emission in the Galactic Center and beyond

The High Energy X-ray Probe (HEX-P): Supernova remnants, pulsar wind nebulae, and nuclear astrophysics

Kavli Affiliate: Melania Nynka | First 5 Authors: Stephen Reynolds, Hongjun An, Moaz Abdelmaguid, Jason Alford, Chris L. Fryer | Summary: HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging ($<10"$ full width at half maximum) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current […]


Continue.. The High Energy X-ray Probe (HEX-P): Supernova remnants, pulsar wind nebulae, and nuclear astrophysics

The High Energy X-ray Probe (HEX-P): Supernova remnants, pulsar wind nebulae, and nuclear astrophysics

Kavli Affiliate: Melania Nynka | First 5 Authors: Stephen Reynolds, Hongjun An, Moaz Abdelmaguid, Jason Alford, Chris L. Fryer | Summary: HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging ($<10"$ full width at half maximum) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current […]


Continue.. The High Energy X-ray Probe (HEX-P): Supernova remnants, pulsar wind nebulae, and nuclear astrophysics

X-Ray Polarized View on the Accretion Geometry in the X-Ray Binary Circinus X-1

Kavli Affiliate: Herman L. Marshall | First 5 Authors: John Rankin, Fabio La Monaca, Alessandro Di Marco, Juri Poutanen, Anna Bobrikova | Summary: Cir X-1 is a neutron star X-ray binary characterized by strong variations in flux during its eccentric $sim$16.6 days orbit. There are also strong variations in the spectral state, and historically it […]


Continue.. X-Ray Polarized View on the Accretion Geometry in the X-Ray Binary Circinus X-1

X-Ray Polarized View on the Accretion Geometry in the X-Ray Binary Circinus X-1

Kavli Affiliate: Herman L. Marshall | First 5 Authors: John Rankin, Fabio La Monaca, Alessandro Di Marco, Juri Poutanen, Anna Bobrikova | Summary: Cir X-1 is a neutron star X-ray binary characterized by strong variations in flux during its eccentric $sim$16.6 days orbit. There are also strong variations in the spectral state, and historically it […]


Continue.. X-Ray Polarized View on the Accretion Geometry in the X-Ray Binary Circinus X-1

X-ray Polarization Reveals the Precessions of the Neutron Star in Hercules X-1

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Jeremy Heyl, Victor Doroshenko, Denis González-Caniulef, Ilaria Caiazzo, Juri Poutanen | Summary: In an accreting X-ray pulsar, a neutron star accretes matter from a stellar companion through an accretion disk. The high magnetic field of the rotating neutron star disrupts the inner edge of the disc, […]


Continue.. X-ray Polarization Reveals the Precessions of the Neutron Star in Hercules X-1

The impact of selection biases on tests of general relativity with gravitational-wave inspirals

Kavli Affiliate: Salvatore Vitale | First 5 Authors: Ryan Magee, Maximiliano Isi, Ethan Payne, Katerina Chatziioannou, Will M. Farr | Summary: Tests of general relativity with gravitational wave observations from merging compact binaries continue to confirm Einstein’s theory of gravity with increasing precision. However, these tests have so far only been applied to signals that […]


Continue.. The impact of selection biases on tests of general relativity with gravitational-wave inspirals

The impact of selection biases on tests of general relativity with gravitational-wave inspirals

Kavli Affiliate: Salvatore Vitale | First 5 Authors: Ryan Magee, Maximiliano Isi, Ethan Payne, Katerina Chatziioannou, Will M. Farr | Summary: Tests of general relativity with gravitational wave observations from merging compact binaries continue to confirm Einstein’s theory of gravity with increasing precision. However, these tests have so far only been applied to signals that […]


Continue.. The impact of selection biases on tests of general relativity with gravitational-wave inspirals