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Dynamical orbital classification of selected N-rich stars with Gaia Data Release 2 astrometry
Fernández-Trincado, José G.; Ortigoza-Urdaneta, Mario; Moreno, Edmundo +4 more
We have used the galaxy modelling algorithm GRAVPOT16, to explore the most probable orbital elements of a sample of 64 selected N-rich stars across the Milky Way. We use the newly measured proper motions from Gaia Data Release 2 with existing line-of-sight velocities from the second generation of the Apache Point Observatory Galactic Evolution Exp…
TICs 167692429 and 220397947: the first compact hierarchical triple stars discovered with TESS
Mitnyan, T.; Pál, A.; Klagyivik, P. +5 more
We report the discovery and complex analyses of the first two compact hierarchical triple star systems discovered with TESS in or near its southern continuous viewing zone during Year 1. Both TICs 167692429 and 220397947 were previously unknown eclipsing binaries, and the presence of a third companion star was inferred from eclipse timing variatio…
The µ Tau Association: A 60 Myr Old Coeval Group at 150 pc from the Sun
Mann, Andrew W.; Faherty, Jacqueline K.; Gagné, Jonathan +3 more
We present an analysis of the newly identified µ Tau Association (MUTA) of young stars at ≃150 pc from the Sun that is part of the large Cas-Tau structure, coeval and comoving with the α Persei cluster. This association is also located in the vicinity of the Taurus-Auriga star-forming region and the Pleiades association, although it is unrel…
Origin and Evolution of Cometary Nuclei
Blum, Jürgen; Morbidelli, Alessandro; Davidsson, Björn +1 more
One of the key goals of the Rosetta mission was to understand how, where and when comets formed in our solar system. There are two major hypotheses for the origin of comets, both pre-Rosetta: (1) hierarchical accretion of dust and ice grains in the Solar Nebula and (2) the growth of pebbles, which are then brought together by streaming instabiliti…
Crust stratigraphy and heterogeneities of the first kilometers at the dichotomy boundary in western Elysium Planitia and implications for InSight lander
Pan, Lu; Quantin-Nataf, Cathy; Tauzin, Benoit +9 more
InSight landed on Mars on November 26, 2018, in western Elysium Planitia. The Mars crust beneath the lander is subject to complex geologic history next to the great topographic and crustal dichotomy of Mars. Understanding this part of the Martian crust in the subsurface would aid future investigations of the internal structure of the planet based …
Hinode/EIS Measurements of Active-region Magnetic Fields
Landi, E.; Li, W.; Hutton, R. +1 more
The present work illustrates the potential of a new diagnostic technique that allows the measurement of the coronal magnetic field strength in solar active regions by utilizing a handful of bright Fe X and Fe XI lines commonly observed by the high-resolution Hinode/EUV Imaging Spectrometer (EIS). The importance of this new diagnostic technique is …
WASP-52b. The effect of star-spot correction on atmospheric retrievals
Mikal-Evans, Thomas; Sing, David K.; López-Morales, Mercedes +13 more
We perform atmospheric retrievals on the full optical to infrared (0.3-5 µ m) transmission spectrum of the inflated hot Jupiter WASP-52b by combining HST/STIS, WFC3 IR, and Spitzer/IRAC observations. As WASP-52 is an active star that shows both out-of-transit photometric variability and star-spot crossings during transits, we account for the…
SCUBA-2 Ultra Deep Imaging EAO Survey (Studies). III. Multiwavelength Properties, Luminosity Functions, and Preliminary Source Catalog of 450 µm Selected Galaxies
Goto, Tomotsugu; Smail, Ian; Ho, Luis C. +35 more
We construct a SCUBA-2 450 µm map in the COSMOS field that covers an area of 300 arcmin2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 µm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of…
New Insights into the H II Region G18.88-0.49: Hub-Filament System and Accreting Filaments
Dewangan, L. K.; Ojha, D. K.; Sharma, Saurabh +3 more
We present an analysis of multiwavelength observations of an area of 0°27 × 0°27 around the Galactic H II region G18.88-0.49, which is powered by an O-type star (age ∼ 105 yr). The Herschel column density map reveals a shell-like feature of extension ∼12 pc × 7 pc and mass ∼2.9 × 104 M⊙ around the H II region; its …
Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)
Kuzuhara, M.; Tamura, M.; Bouchy, F. +93 more
We present the confirmation and characterisation of GJ 3473 b (G 50-16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal (P = 1.1980035 ± 0.0000018 d) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD…