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Comparison of a pebbles-based model with the observed evolution of the water and carbon dioxide outgassing of comet 67P/Churyumov-Gerasimenko
Fulle, M.; Mottola, S.; Bockelée-Morvan, D. +11 more
The Rosetta mission escorted comet 67P/Churyumov-Gerasimenko for approximately two years including the perihelion passage (1.24 au, 2015 August), allowing us to monitor the seasonal evolution of the water and carbon dioxide loss rates. Here, we model 67P/Churyumov-Gerasimenko water and carbon dioxide production as measured by the Rosina experiment…
The GAPS Programme at TNG. XLVII. A conundrum resolved: HIP 66074b/Gaia-3b characterised as a massive giant planet on a quasi-face-on and extremely elongated orbit
Scandariato, G.; Pagano, I.; Marzari, F. +37 more
The nearby mid-K dwarf HIP 66074 was recently identified as host to a candidate super-Jupiter companion on a ∼300 day, almost edge-on, orbit, based on Gaia Data Release 3 (DR3) astrometry. Initial attempts at confirming the planetary nature of the signal based on publicly available radial-velocity (RV) observations uncovered an intriguing conundru…
Gas, dust, and the CO-to-molecular gas conversion factor in low-metallicity starbursts
Menten, K. M.; Hunt, L. K.; Ginolfi, M. +19 more
The factor relating CO emission to molecular hydrogen column density, XCO, is still subject to uncertainty, in particular at low metallicity. In this paper, to quantify XCO at two different spatial resolutions, we exploited a dust-based method together with ALMA 12-m and ACA data and H I maps of three nearby metal-poor starbu…
A planetary collision afterglow and transit of the resultant debris cloud
Mamajek, Eric; Kirkpatrick, J. Davy; Sainio, Arttu +19 more
Planets grow in rotating disks of dust and gas around forming stars, some of which can subsequently collide in giant impacts after the gas component is removed from the disk1-3. Monitoring programmes with the warm Spitzer mission have recorded substantial and rapid changes in mid-infrared output for several stars, interpreted as variati…
Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems
Butler, R. Paul; Jordán, Andrés; Brahm, Rafael +18 more
The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have likely experienced minimal dynamical disruptions, the spin-orbit orientations of these systems inform the typical outcomes of quiescent planet formation, as well as the primord…
IC 5146 Dark Streamer: The First Reliable Candidate of Edge Collapse, Hub-filament Systems, and Intertwined Sub-filaments
Men'shchikov, A.; Dewangan, L. K.; Baug, T. +5 more
The paper presents an analysis of multiwavelength data of a nearby star-forming site, the IC 5146 dark streamer (d ~ 600 pc), which has been treated as a single and long filament, fl. Two hub-filament systems (HFSs) are known to exist toward the eastern and the western ends of fl. Earlier published results favor simultaneous evidence of HFSs and e…
Model-independent Mass Reconstruction of the Hubble Frontier Field Clusters with MARS Based on Self-consistent Strong-lensing Data
Jee, M. James; Cha, Sangjun
We present a new strong-lensing (SL) mass reconstruction of the six Hubble Frontier Fields (HFF) clusters with the MAximum-entropy ReconStruction (MARS) algorithm. MARS is a new free-form inversion method, which suppresses spurious small-scale fluctuations while achieving excellent convergence in positions of multiple images. For each HFF cluster,…
The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43
Zhang, Yapeng; Pattle, Kate; Karoly, Janik +155 more
We present observations of polarized dust emission at 850 µm from the L43 molecular cloud, which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part of the BISTRO large program. L43 is a dense ( ${N}_{{{\rm{H}}}_{2}}\sim {10}^{22}$ -1023 cm-2) compl…
The interaction of supernova 2018evt with a substantial amount of circumstellar matter - An SN 1997cy-like event
Filippenko, Alexei V.; Baade, Dietrich; Wang, Lifan +29 more
A rare class of supernovae (SNe) is characterized by strong interaction between the ejecta and several solar masses of circumstellar matter (CSM) as evidenced by strong Balmer-line emission. Within the first few weeks after the explosion, they may display spectral features similar to overluminous Type Ia SNe, while at later phase their observation…
Constraining the AGN Luminosity Function from JWST with the X-Ray Background
Loeb, Abraham; Padmanabhan, Hamsa
We predict the X-ray background (XRB) expected from the population of quasars detected by the James Webb Space Telescope spectroscopic surveys over the redshift range z ~ 4-7. We find that the measured UV emissivities imply a ~10 times higher unresolved XRB than constrained by current experiments. We illustrate the difficulty of simultaneously mat…