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Evidence that the Hot Jupiter WASP-77 A b Formed Beyond Its Parent Protoplanetary Disk's H2O Ice Line
Sing, David K.; Lothringer, Joshua D.; Reggiani, Henrique +2 more
Idealized protoplanetary disk and giant planet formation models have been interpreted to suggest that a giant planet's atmospheric abundances can be used to infer its formation location in its parent protoplanetary disk. It has recently been reported that the hot Jupiter WASP-77 A b has subsolar atmospheric carbon and oxygen abundances with a sola…
Effects of UV Stellar Spectral Uncertainty on the Chemistry of Terrestrial Atmospheres
Youngblood, Allison; Kempton, Eliza M. -R.; Arney, Giada +2 more
The upcoming deployment of the James Webb Space Telescope will dramatically advance our ability to characterize exoplanet atmospheres, both in terms of precision and sensitivity to smaller and cooler planets. Disequilibrium chemical processes dominate these cooler atmospheres, requiring accurate photochemical modeling of such environments. The hos…
TOI-3714 b and TOI-3629 b: Two Gas Giants Transiting M Dwarfs Confirmed with the Habitable-zone Planet Finder and NEID
Kobulnicky, Henry A.; Cochran, William D.; Mahadevan, Suvrath +36 more
We confirm the planetary nature of two gas giants discovered by the Transiting Exoplanet Survey Satellite to transit M dwarfs. TOI-3714 (V = 15.24, J = 11.74) is an M2 dwarf hosting a hot Jupiter (M p = 0.70 ± 0.03 M J and R p = 1.01 ± 0.03 R J ) on an orbital period of 2.154849 ± 0.000001 days wi…
Weak Mass Loss from the Red Supergiant Progenitor of the Type II SN 2021yja
Kilpatrick, Charles D.; Foley, Ryan J.; Pan, Yen-Chen +56 more
We present high-cadence optical, ultraviolet (UV), and near-infrared data of the nearby (D ≈ 23 Mpc) Type II supernova (SN) 2021yja. Many Type II SNe show signs of interaction with circumstellar material (CSM) during the first few days after explosion, implying that their red supergiant (RSG) progenitors experience episodic or eruptive mass loss. …
Prospects for multimessenger detection of binary neutron star mergers in the fourth LIGO-Virgo-KAGRA observing run
Patricelli, Barbara; Bernardini, Maria Grazia; Mapelli, Michela +5 more
The joint detection of GW170817 and GRB 170817A opened the era of multimessenger astronomy with gravitational waves (GWs) and provided the first direct probe that at least some binary neutron star (BNS) mergers are progenitors of short gamma-ray bursts (S-GRBs). In the next years, we expect to have more multimessenger detections of BNS mergers, th…
An Updated Metal-dependent Theoretical Scenario for Classical Cepheids
Marconi, Marcella; Molinaro, Roberto; Ripepi, Vincenzo +3 more
To properly quantify the possible residual systematic errors affecting the classical Cepheid distance scale, a detailed theoretical scenario is recommended. By extending the set of nonlinear, convective pulsation models published for Z = 0.02 to Z = 0.004, Z = 0.008, and Z = 0.03, we provide a detailed homogeneous, nonlinear model grid taking into…
High-energy neutrino transients and the future of multi-messenger astronomy
Guépin, Claire; Kotera, Kumiko; Oikonomou, Foteini
The discovery of high-energy astrophysical neutrinos and the first hints of coincident electromagnetic and neutrino emissions opened new opportunities in multi-messenger astronomy. Owing to their high power, transient sources are expected to supply a significant fraction of the observed energetic astroparticles, through enhanced particle accelerat…
Strong lensing in UNIONS: Toward a pipeline from discovery to modeling
Scott, D.; Fabbro, S.; Gavazzi, R. +16 more
We present a search for galaxy-scale strong gravitational lenses in the initial 2500 square degrees of the Canada-France Imaging Survey (CFIS). We designed a convolutional neural network (CNN) committee that we applied to a selection of 2 344 002 exquisite-seeing r-band images of color-selected luminous red galaxies. Our classification uses a real…
Black hole spin–orbit misalignment in the x-ray binary MAXI J1820+070
Jonker, Peter G.; Piirola, Vilppu; Tsygankov, Sergey S. +10 more
The observational signatures of black holes in x-ray binary systems depend on their masses, spins, accretion rate, and the misalignment angle between the black hole spin and the orbital angular momentum. We present optical polarimetric observations of the black hole x-ray binary MAXI J1820+070, from which we constrain the position angle of the bin…
J-PLUS: Stellar parameters, C, N, Mg, Ca, and [α/Fe] abundances for two million stars from DR1
Xiang, Maosheng; Huang, Yang; Liu, Jifeng +20 more
Context. The Javalambre Photometric Local Universe Survey (J-PLUS) has obtained precise photometry in 12 specially designed filters for large numbers of Galactic stars. Deriving their precise stellar atmospheric parameters and individual elemental abundances is crucial for studies of Galactic structure and the assembly history and chemical evoluti…