Spin it as you like: the (lack of a) measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes

Kavli Affiliate: Salvatore Vitale | First 5 Authors: Salvatore Vitale, Sylvia Biscoveanu, Colm Talbot, , | Summary: The growing set of gravitational-wave sources is being used to measure the properties of the underlying astrophysical populations of compact objects, black holes and neutron stars. Most of the detected systems are black hole binaries. While much has […]


Continue.. Spin it as you like: the (lack of a) measurement of the spin tilt distribution with LIGO-Virgo-KAGRA binary black holes

Polarized Blazar X-rays imply particle acceleration in shocks

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Ioannis Liodakis, Alan P. Marscher, Iván Agudo, Andrei V. Berdyugin, Maria I. Bernardos | Summary: Blazars are active galactic nuclei that launch collimated, powerful jets of magnetized relativistic plasma. Their primary jet, whose emission typically spans from low-frequency radio to very high-energy ($gtrsim0.1$ TeV) $gamma$-rays (Blandford […]


Continue.. Polarized Blazar X-rays imply particle acceleration in shocks

Polarized Blazar X-rays imply particle acceleration in shocks

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Ioannis Liodakis, Alan P. Marscher, Iván Agudo, Andrei V. Berdyugin, Maria I. Bernardos | Summary: Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to $sim 1$ […]


Continue.. Polarized Blazar X-rays imply particle acceleration in shocks

Stellar Bars in Isolated Gas-Rich Spiral Galaxies Do Not Slow Down

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Angus Beane, Lars Hernquist, Elena D’Onghia, Federico Marinacci, Charlie Conroy | Summary: Elongated bar-like features are ubiquitous in galaxies, occurring at the centers of approximately two-thirds of spiral disks. Due to gravitational interactions between the bar and the other components of galaxies, it is expected that angular […]


Continue.. Stellar Bars in Isolated Gas-Rich Spiral Galaxies Do Not Slow Down

The X-ray polarimetry view of the accreting pulsar Cen X-3

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Sergey S. Tsygankov, Victor Doroshenko, Juri Poutanen, Jeremy Heyl, Alexander A. Mushtukov | Summary: Cen X-3 is the first X-ray pulsar discovered 50 years ago. Radiation from such objects is expected to be highly polarized due to birefringence of plasma and vacuum associated with propagation of […]


Continue.. The X-ray polarimetry view of the accreting pulsar Cen X-3

Discovery of an Ultra Lithium-rich Metal-Poor Red Giant star

Kavli Affiliate: Anna Frebel | First 5 Authors: Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Yangyang Li | Summary: We present the discovery of 2MASS J05241392-0336543 (hereafter J0524-0336), a very metal-poor ([Fe/H]=-2.43 pm 0.16), highly r-process-enhanced ([Eu/Fe]=+1.34 pm 0.10) Milky Way halo field red giant star, with an ultra high Li abundance of […]


Continue.. Discovery of an Ultra Lithium-rich Metal-Poor Red Giant star

Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement

Kavli Affiliate: Anna Frebel | First 5 Authors: Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Ella Xi Wang | Summary: We present the discovery of 2MASS J05241392-0336543 (hereafter J0524-0336), a very metal-poor ([Fe/H]=-2.43 +- 0.16), highly r-process-enhanced ([Eu/Fe]= +1.34 +- 0.10) Milky Way halo field red giant star, with an ultra high Li […]


Continue.. Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement

The Cosmic Ultraviolet Baryon Survey (CUBS) V: On the Thermodynamic Properties of the Cool Circumgalactic Medium at $z < 1$

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Zhijie Qu, Hsiao-Wen Chen, Gwen C. Rudie, Fakhri S. Zahedy, Sean D. Johnson | Summary: This paper presents a systematic study of the photoionization and thermodynamic properties of the cool circumgalactic medium (CGM) as traced by rest-frame ultraviolet absorption lines around 26 galaxies at redshift $zlesssim1$. […]


Continue.. The Cosmic Ultraviolet Baryon Survey (CUBS) V: On the Thermodynamic Properties of the Cool Circumgalactic Medium at $z < 1$

Anisotropic satellite accretion onto the Local Group with HESTIA

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Alexandra Dupuy, Noam I. Libeskind, Yehuda Hoffman, Hélène M. Courtois, Stefan Gottlöber | Summary: How the cosmic web feeds halos, and fuels galaxy formation is an open question with wide implications. This study explores the mass assembly in the Local Group within the context of the local […]


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Uncovering dark matter density profiles in dwarf galaxies with graph neural networks

Kavli Affiliate: Lina Necib | First 5 Authors: Tri Nguyen, Siddharth Mishra-Sharma, Reuel Williams, Lina Necib, | Summary: Dwarf galaxies are small, dark matter-dominated galaxies, some of which are embedded within the Milky Way. Their lack of baryonic matter (e.g., stars and gas) makes them perfect test beds for probing the properties of dark matter […]


Continue.. Uncovering dark matter density profiles in dwarf galaxies with graph neural networks