A5000517390- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Planetary Science and Exploration
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
Southwest Research Institute
2022-2024
George Washington University
2022-2023
Asteroids with diameters less than about 5 km have complex histories because they are small enough for radiative torques, YORP, to be a notable factor in their evolution. (152830) Dinkinesh is asteroid orbiting the Sun near inner edge of Main Asteroid Belt heliocentric semimajor axis 2.19 AU; its S type spectrum typical bodies this part Belt. Here we report observations by Lucy spacecraft as it passed within 431 Dinkinesh. revealed Dinkinesh, which has an effective diameter only $\sim$720 m,...
ABSTRACT Gamma-ray bursts (GRBs) categorically produce broad-band afterglow emission, but in some cases, emission the optical band is dimmer than expected based on contemporaneously observed X-ray flux. This phenomenon, aptly dubbed ‘optical darkness’, has been studied extensively long GRBs (associated with explosive deaths of massive stars), possible explanations ranging from host environment extinction to high redshift possibly unique mechanisms. However, investigations into darkness short...
Abstract We present a catalog of X-ray Detected Be Stars (XDBS) with 161 stars from the Star Spectra (BeSS) database having counterparts in Chandra Source Catalog v2.0, XMM-Newton 4XMM-DR11 Catalog, or Swift 2SXPS Catalog. The multi-wavelength includes accurate optical positions, properties (fluxes, photon indices and hardness ratios), optical, near-infrared infrared photometry, source classifications (when available), other including proper motions, effective temperatures, to flux ratios as...
Gamma-ray bursts categorically produce broadband afterglow emission, but in some cases, emission the optical band is dimmer than expected based on contemporaneously observed X-ray flux. This phenomenon, aptly dubbed "optical darkness", has been studied extensively long GRBs (associated with explosive deaths of massive stars), possible explanations ranging from host environment extinction to high redshift possibly unique mechanisms. However, investigations into darkness short mergers compact...