Kavli Affiliate: Christopher J. Burke | First 5 Authors: Steve Bryson, Michelle Kunimoto, Ravi K. Kopparapu, Jeffrey L. Coughlin, William J. Borucki | Summary: We present occurrence rates for rocky planets in the habitable zones (HZ) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties. We provide the […]
Kavli Affiliate: Richard Mittleman| First 5 Authors: The LIGO Scientific Collaboration, The LIGO Scientific Collaboration, , , | Summary:Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the consistency of the data with predictions from the theory. We […]
Kavli Affiliate: Christopher J. Burke | First 5 Authors: Ian J. M. Crossfield, Diana Dragomir, Nicolas B. Cowan, Tansu Daylan, Ian Wong | Summary: Phase curve measurements provide a global view of the composition, thermal structure, and dynamics of exoplanet atmospheres. Although most of the dozens of phase curve measurements made to date are of […]
Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Erin Boettcher, Hsiao-Wen Chen, Fakhri S. Zahedy, Thomas J. Cooper, Sean D. Johnson | Summary: We report the serendipitous detection of an H$_{2}$-bearing damped Lyman-$alpha$ absorber at z = 0.576 in the spectrum of the QSO J0111-0316 in the Cosmic Ultraviolet Baryon Survey. Spectroscopic observations from […]
Kavli Affiliate: Herman Marshall | First 5 Authors: Daniel Schwartz, Aneta Siemiginowska, Brad Snios, Diana Worrall, Mark Birkinshaw | Summary: We report the detection of extended X-ray emission from two high-redshift radio quasars. These quasars, J1405+0415 at $z$=3.208 and J1610+1811 at $z$=3.118, were observed in a Chandra snapshot survey selected from a complete sample of […]
Kavli Affiliate: David A. Principe | First 5 Authors: Amit Kashi, David A. Principe, Noam Soker, Joel H. Kastner, | Summary: The massive binary system Eta Carinae is characterized by intense colliding winds that form shocks and emit X-rays. The system is highly eccentric ($esimeq0.9$), resulting in modulated X-ray emission during its 5.54 year orbit. […]
Kavli Affiliate: Salvatore Vitale | First 5 Authors: Hsin-Yu Chen, Carl-Johan Haster, Salvatore Vitale, Will M. Farr, Maximiliano Isi | Summary: The identification of the electromagnetic counterpart candidate ZTF19abanrhr to the binary black hole merger GW190521 opens the possibility to infer cosmological parameters from this standard siren with a uniquely identified host galaxy. The distant […]
Kavli Affiliate: Robert F. Goeke | First 5 Authors: Kristo Ment, Jonathan Irwin, David Charbonneau, Jennifer G. Winters, Amber Medina | Summary: We present the discovery of TOI 540 b, a hot planet slightly smaller than Earth orbiting the low-mass star 2MASS J05051443-4756154. The planet has an orbital period of $P = 1.239149$ days ($pm$ […]
Kavli Affiliate: Andrew M. Vanderburg | First 5 Authors: Theron W. Carmichael, Samuel N. Quinn, George Zhou, Nolan Grieves, Francois Bouchy | Summary: We report the discovery of two transiting brown dwarfs (BDs), TOI-811b and TOI-852b, from NASA’s Transiting Exoplanet Survey Satellite mission. These two transiting BDs have similar masses, but very different radii and […]
Kavli Affiliate: Melania Nynka | Summary:We use the first observation of Betelgeuse in hard $X$-rays to perform a novel search for axion-like particles (ALPs). Betelgeuse is not expected to be a standard source of $X$-rays, but light ALPs produced in the stellar core could be converted back into photons in the Galactic magnetic field, producing […]