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19912026
Showing 2024 · astro-ph.SRShow all

8 papers · 2 filters

astro-ph.SR2024★ 29 cited

The cool brown dwarf Gliese 229 B is a close binary

Jerry W. Xuan, A. Mérand, W. Thompson +76

Owing to their similarities with giant exoplanets, brown dwarf companions of stars provide insights into the fundamental processes of planet formation and evolution. From their orb…

astro-ph.SR2024★ 7 cited

First joint X-ray solar microflare observations with NuSTAR and Solar Orbiter/STIX

Natália Bajnoková, Iain G. Hannah, Kristopher Cooper +5

We present the first joint spectral and imaging analysis of hard X-ray (HXR) emission from 3 microflares observed by the Nuclear Spectroscopic Telescope ARray (NuSTAR) and Solar Or…

astro-ph.SR2024★ 3 cited

Population synthesis of Thorne-Żytkow objects: Rejuvenated donors and unexplored progenitors in the common envelope formation channel

K. Nathaniel, A. Vigna-Gómez, A. Grichener +3

Context. Common envelope evolution of a massive star and a neutron star companion has two possible outcomes: formation of a short-period binary (a potential gravitational wave sour…

astro-ph.SR2024★ 18 cited

Rotation and Abundances of the Benchmark Brown Dwarf HD 33632 Ab from Keck/KPIC High-resolution Spectroscopy

Chih-Chun Hsu, Jason J. Wang, Jerry W. Xuan +24

We present the projected rotational velocity and molecular abundances for HD 33632 Ab obtained via Keck Planet Imager and Characterizer high-resolution spectroscopy. HD 33632 Ab is…

astro-ph.SR2024★ 10 cited

Exploring the directly imaged HD 1160 system through spectroscopic characterization and high-cadence variability monitoring

Ben J. Sutlieff, Jayne L. Birkby, Jordan M. Stone +15

The time variability and spectra of directly imaged companions provide insight into their physical properties and atmospheric dynamics. We present follow-up R~40 spectrophotometric…

astro-ph.SR2024★ 17 cited

Fresh view of the hot brown dwarf HD 984 B through high-resolution spectroscopy

J. C. Costes, J. W. Xuan, A. Vigan +26

Context. High-resolution spectroscopy has the potential to drive a better understanding of the atmospheric composition, physics, and dynamics of young exoplanets and brown dwarfs,…

astro-ph.SR2024★ 2 cited

PHL 5038AB: Is the brown dwarf causing pollution of its white dwarf host star?

S. L. Casewell, J. Debes, T. J. Dupuy +9

We present new results on PHL 5038AB, a widely separated binary system composed of a white dwarf and a brown dwarf, refining the white and brown dwarf parameters and determining th…

astro-ph.SR2024★ 18 cited

Direct-imaging Discovery of a Substellar Companion Orbiting the Accelerating Variable Star, HIP 39017

Taylor L. Tobin, Thayne Currie, Yiting Li +23

We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to the young, Doradus-type variable star, HIP 39017 (HD 65526). The…