Results 121 to 130 of about 36,255 (216)

exoALMA. XXIV. Formaldehyde Emission in Protoplanetary Disks of exoALMA Compared with Their Properties and Dynamical State

open access: yesThe Astrophysical Journal Letters
The presence of asymmetries and substructures in protoplanetary disks, revealed by both dust and gas emission, highlights the potential interplay and the broader connection between chemistry and dynamics in disk evolution.
Felipe Alarcón   +17 more
doaj   +1 more source

A Time-resolved High-resolution Spectroscopic Analysis of Ionized Calcium and Dynamical Processes in the Ultra-hot Jupiter HAT-P-70 b

open access: yesThe Astrophysical Journal Letters
We present the first transmission spectroscopy study of an exoplanet atmosphere with the high-resolution mode of the new Gemini High-resolution Optical SpecTrograph (GHOST) instrument at the Gemini South Observatory. We observed one transit of HAT-P-70 b—
Adam B. Langeveld   +7 more
doaj   +1 more source

Recent Star Formation in 0.5 < z < 1.5 Quiescent Galaxies

open access: yesThe Astrophysical Journal Letters
Observations of massive, quiescent galaxies reveal a relatively uniform evolution: following prolific star formation in the early Universe, these galaxies quench and transition to their characteristic quiescent state in the local Universe.
Michael J. Rutkowski   +26 more
doaj   +1 more source

Latitudinal Asymmetry in the Dayside Atmosphere of WASP-43b

open access: yesThe Astrophysical Journal Letters
We present two-dimensional near-infrared temperature maps of the canonical hot Jupiter WASP-43b using a phase-curve observation with JWST NIRSpec/G395H. From the white-light planetary transit, we improve constraints on the planet’s orbital parameters and
Ryan C. Challener   +11 more
doaj   +1 more source

X-Rays from a Central “Exhaust Vent” of the Galactic Center Chimney

open access: yesThe Astrophysical Journal Letters
Using deep archival observations from the Chandra X-ray Observatory, we present an analysis of linear X-ray-emitting features located within the southern portion of the Galactic center chimney and oriented orthogonal to the Galactic plane, centered at ...
Scott C. Mackey   +4 more
doaj   +1 more source

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