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Water-rich Disks around Late M Stars Unveiled: Exploring the Remarkable Case of Sz 114
Zhang, Ke; Pascucci, Ilaria; Banzatti, Andrea +18 more
We present an analysis of the JDISCS JWST/MIRI-MRS spectrum of Sz 114, an accreting M5 star surrounded by a large dust disk with a shallow gap at ~39 au. The spectrum is molecule-rich; we report the detection of water, CO, CO2, HCN, C2H2, and H2. The only identified atomic/ionic transition is from [Ne II…
The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information
Aird, James; Lapi, Andrea; Carrera, Francisco J. +10 more
A complete census of active galactic nuclei (AGNs) is a prerequisite for understanding the growth of supermassive black holes across cosmic time. A significant challenge towards this goal is the whereabouts of heavily obscured AGN that remain uncertain. This paper sets new constraints on the demographics of this population by developing a methodol…
The mystery in Gaia DR3 triples: occurrence rates, orientations, and eccentricities of wide tertiaries around close binaries
Hwang, Hsiang-Chih
The formation of close binaries has been an open question for decades. A large fraction of close binaries are in triple systems, suggesting that their formation may be associated with the Kozai-Lidov mechanism. However, this picture remains under debate because the configurations of many observed triples are unlikely to trigger the Kozai-Lidov mec…
X-SHYNE: X-shooter spectra of young exoplanet analogs. I. A medium-resolution 0.65-2.5 µm one-shot spectrum of VHS 1256−1257 b
Bayo, A.; Tremblin, P.; Lagrange, A. -M. +13 more
We present simultaneous 0.65-2.5 µm medium resolution (3300 ≤ Rλ ≤ 8100) VLT/X-shooter spectra of the relatively young (150-300 Myr) low-mass (19 ± 5MJup) L-T transition object VHS 1256−1257 b, a known spectroscopic analog of HR8799d. The companion is a prime target for the JWST Early Release Science (ERS) and one of th…
Precise physical conditions for the warm gas outflows in the nearby active galaxy IC 5063
Morganti, Raffaella; Oosterloo, Tom; Holden, Luke R. +1 more
Active galactic nucleus (AGN)-driven outflows are now routinely used in models of galaxy evolution as a feedback mechanism; however, many of their properties remain highly uncertain. Perhaps the greatest source of uncertainty is the electron density of the outflowing gas, which directly affects derived kinetic powers and mass outflow rates. Here w…
High-energy Neutrinos from the Inner Circumnuclear Region of NGC 1068
Gallagher, John S.; Lopez Rodriguez, Enrique; Halzen, Francis +1 more
High-energy neutrinos are detected by the IceCube Observatory in the direction of NGC 1068, the archetypical type II Seyfert galaxy. The neutrino flux, surprisingly, is more than an order of magnitude higher than the γ-ray upper limits at measured TeV energy, posing tight constraints on the physical conditions of a neutrino production site. We rep…
The Masses of a Sample of Radial-velocity Exoplanets with Astrometric Measurements
Zhao, Gang; Wang, Wei; Xiao, Guang-Yao +6 more
Being one of the most fundamental physical parameter of astronomical objects, mass plays a vital role in the study of exoplanets, including their temperature structure, chemical composition, formation, and evolution. However, nearly a quarter of the known confirmed exoplanets lack measurements of their masses. This is particularly severe for those…
The complex organic molecular content in the L1517B starless core
Martín-Pintado, J.; Caselli, P.; Spezzano, S. +5 more
Recent observations of the pre-stellar core L1544 and the younger starless core L1498 have revealed that complex organic molecules (COMs) are enhanced in the gas phase towards their outer and intermediate-density shells. Our goal is to determine the level of chemical complexity towards the starless core L1517B, which seems younger than L1498, and …
Multiscale stellar associations across the star formation hierarchy in PHANGS-HST nearby galaxies: methodology and properties
Kruijssen, J. M. Diederik; Leroy, Adam K.; Rosolowsky, Erik +19 more
We develop a method to identify and determine the physical properties of stellar associations using Hubble Space Telescope (HST) NUV-U-B-V-I imaging of nearby galaxies from the Physics at High Angular Resolution in Nearby GalaxieS with the Hubble Space Telescope (PHANGS-HST) survey. We apply a watershed algorithm to density maps constructed from p…
Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey
Schneider, Adam C.; Vrba, Frederick J.; Munn, Jeffrey A. +5 more
We present the positions, proper motions, and near-infrared photometry for 966 known objects with spectral types later than M that were observed as part of the the UKIRT Hemisphere Survey (UHS). We augment the photometry and astrometry from UHS with information from Gaia DR3, Pan-STARRS DR2, and CatWISE 2020 to produce a database of homogeneous ph…