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TOI-1296b and TOI-1298b observed with TESS and SOPHIE: two hot Saturn-mass exoplanets with different densities around metal-rich stars
Deleuil, M.; Moutou, C.; Hoyer, S. +40 more
We present the discovery of two new transiting extrasolar planet candidates identified as TOI-1296.01 and TOI-1298.01 by the Transiting Exoplanet Survey Satellite (TESS). The planetary nature of these candidates has been secured with the SOPHIE high-precision spectrograph through the measurement of the companion's mass with the radial velocity met…
The post-main-sequence fate of the HR 8799 planetary system
Hinkley, Sasha; Veras, Dimitri
The noteworthy four-planet HR 8799 system teeters on the brink of gravitational instability and contains an A-type host star that is characteristic of the progenitors of the majority of known white dwarf planetary system hosts. Goździewski & Migaszewski have demonstrated that the system can retain all four planets for at least 1 Gyr along the …
Magnetic Topology at Venus: New Insights Into the Venus Plasma Environment
Xu, Shaosui; Frahm, Rudy A.; Luhmann, Janet G. +2 more
This study provides the first characterization of magnetic topology (i.e., the magnetic connectivity to the collisional ionosphere) at Venus, which might give new insights into the Venusian space environment on topics such as the penetration of the interplanetary magnetic field (IMF) into the ionosphere, planetary ion outflow and inflow, and auror…
Constraints on the nearby exoplanet ɛ Indi Ab from deep near- and mid-infrared imaging limits
Viswanath, Gayathri; Pantin, Eric; Brandner, Wolfgang +16 more
The past decade has seen increasing efforts in detecting and characterising exoplanets using high-contrast imaging in the near- and mid-infrared, which is the optimal wavelength domain for studying old, cold planets. In this work, we present deep adaptive optics imaging observations of the nearby Sun-like star ɛ Ind A with the NaCo (L') and NEAR (…
SEEDisCS. I. Molecular gas in galaxy clusters and their large-scale structure: The case of CL1411.1−1148 at z ∼ 0.5
Jablonka, P.; De Lucia, G.; Zaritsky, D. +7 more
We investigate how the galaxy reservoirs of molecular gas fuelling star formation are transformed while the host galaxies infall onto galaxy cluster cores. As part of the Spatially Extended ESO Distant Cluster Survey (SEEDisCS), we present CO(3-2) observations of 27 star-forming galaxies obtained with the Atacama Large Millimeter Array. These sour…
An observational testbed for cosmological zoom-in simulations: constraining stellar migration in the solar cylinder using asteroseismology
Grand, Robert J. J.; Stokholm, Amalie; Verma, Kuldeep +1 more
Large-scale stellar surveys coupled with recent developments in magneto-hydrodynamical simulations of the formation of Milky Way-mass galaxies provide an unparalleled opportunity to unveil the physical processes driving the evolution of the Galaxy. We developed a framework to compare a variety of parameters with their corresponding predictions fro…
A Comparison of Star-forming Clumps and Tidal Tails in Local Mergers and High-redshift Galaxies
Calzetti, Daniela; Whitmore, Bradley C.; Chandar, Rupali +8 more
The Clusters, Clumps, Dust, and Gas in Extreme Star-forming Galaxies (CCDG) survey with the Hubble Space Telescope includes multiwavelength imaging of 13 galaxies less than 100 Mpc away, spanning a range of morphologies and sizes, from blue compact dwarfs to luminous infrared galaxies, all with star formation rates in excess of hundreds of solar m…
Forbidden Line Emission from Type Ia Supernova Remnants Containing Balmer-dominated Shells
Leibundgut, Bruno; Raymond, John C.; Chu, You-Hua +3 more
Balmer-dominated shells in supernova remnants (SNRs) are produced by collisionless shocks advancing into a partially neutral medium and are most frequently associated with Type Ia supernovae. We have analyzed Hubble Space Telescope (HST) images and Very Large Telescope (VLT)/Multi-Unit Spectroscopic Explorer (MUSE) or AAT/Wide Field Integral Spect…
The Gaia view of the Cepheus flare
Ábrahám, Péter; Kun, Mária; Szilágyi, Máté
We present a new census of candidate pre-main-sequence stars in the Cepheus flare star-forming region, based on Gaia EDR3 parallaxes, proper motions, and colour-magnitude diagrams. We identified new candidate members of the previously known young stellar groups associated with NGC 7023, L1177, L1217/L1219, L1228, L1235, and L1251. We studied the 3…
New low-mass members of Chamaeleon I and ϵ Cha
Scholz, A.; Mužić, K.; Almendros-Abad, V. +3 more
Aims: The goal of this paper is to increase the membership list of the Chamaeleon star-forming region and the ϵ Cha moving group, in particular for low-mass stars and substellar objects. We extended the search region significantly beyond the dark clouds.
Methods: Our sample has been selected based on proper motions and colours obtained f…