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The First VERA Astrometry Catalog
Nakanishi, Hiroyuki; Hirota, Tomoya; Kurayama, Tomoharu +59 more
We present the first astrometry catalog from the Japanese VLBI (very long baseline interferometer) project VERA (VLBI Exploration of Radio Astrometry). We have compiled all the astrometry results from VERA, providing accurate trigonometric-annual-parallax and proper-motion measurements. In total, 99 maser sources are listed in the VERA catalog. Am…
X-Ray Properties of TDEs
Komossa, S.; Jonker, P. G.; Auchettl, K. +1 more
Observational astronomy of tidal disruption events (TDEs) began with the detection of X-ray flares from quiescent galaxies during the ROSAT all-sky survey of 1990-1991. The flares complied with theoretical expectations, having high peak luminosities (Lx up to ≥4 ×1044erg/s), a thermal spectrum with k T ∼few×105K, a…
The Solar Orbiter Science Activity Plan. Translating solar and heliospheric physics questions into action
Lewis, G. R.; Fedorov, A.; Livi, S. +182 more
Solar Orbiter is the first space mission observing the solar plasma both in situ and remotely, from a close distance, in and out of the ecliptic. The ultimate goal is to understand how the Sun produces and controls the heliosphere, filling the Solar System and driving the planetary environments. With six remote-sensing and four in-situ instrument …
The Featureless Transmission Spectra of Two Super-puff Planets
Fortney, Jonathan J.; Désert, Jean-Michel; Line, Michael R. +9 more
The Kepler mission revealed a class of planets known as "super-puffs," with masses only a few times larger than Earth's but radii larger than Neptune, giving them very low mean densities. All three of the known planets orbiting the young solar-type star Kepler 51 are super-puffs. The Kepler 51 system thereby provides an opportunity for a comparati…
Rotation Curves in z ∼ 1-2 Star-forming Disks: Evidence for Cored Dark Matter Distributions
Lutz, D.; Wuyts, S.; Förster Schreiber, N. M. +22 more
We report high-quality, Hα or CO rotation curves (RCs) to several Re for 41 large, massive, star-forming disk galaxies (SFGs) across the peak of cosmic galaxy evolution (z ∼ 0.67-2.45), taken with the ESO-VLT, the LBT and IRAM-NOEMA. Most RC41 SFGs have reflection-symmetric RCs plausibly described by equilibrium dynamics. We fit the maj…
PLATON II: New Capabilities and a Comprehensive Retrieval on HD 189733b Transit and Eclipse Data
Knutson, Heather A.; Zhang, Michael; Kempton, Eliza M. -R. +2 more
Recently, we introduced PLanetary Atmospheric Tool for Observer Noobs (PLATON), a Python package that calculates model transmission spectra for exoplanets and retrieves atmospheric characteristics based on observed spectra. We now expand its capabilities to include the ability to compute secondary eclipse depths. We have also added the option to c…
RELICS: The Reionization Lensing Cluster Survey and the Brightest High-z Galaxies
Frye, Brenda L.; Strait, Victoria; Lovisari, Lorenzo +32 more
Massive foreground galaxy clusters magnify and distort the light of objects behind them, permitting a view into both the extremely distant and intrinsically faint galaxy populations. We present here the $z\sim 6\mbox{--}8$ candidate high-redshift galaxies from the Reionization Lensing Cluster Survey (RELICS), a Hubble and Spitzer Space Telescope s…
Keeping It Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk
Ting, Yuan-Sen; Rix, Hans-Walter; Frankel, Neige +1 more
A star in the Milky Way's disk can now be at a Galactocentric radius quite distant from its birth radius for two reasons: either its orbit has become eccentric through radial heating, which increases its radial action JR ("blurring"), or merely its angular momentum Lz has changed and thereby its guiding radius ("churning"). W…
Magnetohydrodynamic and kinetic scale turbulence in the near-Earth space plasmas: a (short) biased review
Sahraoui, Fouad; Huang, Shiyong; Hadid, Lina
The near-Earth space is a unique laboratory to explore turbulence and energy dissipation processes in magnetized plasmas thanks to the availability of high-quality data from various orbiting spacecraft, such as Wind, Stereo, Cluster, Themis, and the more recent one, the NASA Magnetospheric Multiscale (MMS) mission. In comparison with the solar win…
Galaxy And Mass Assembly (GAMA): a forensic SED reconstruction of the cosmic star formation history and metallicity evolution by galaxy type
Hopkins, Andrew M.; Driver, Simon P.; Robotham, Aaron S. G. +9 more
We apply the spectral energy distribution (SED) fitting code PROSPECT to multiwavelength imaging for ∼7000 galaxies from the GAMA survey at z < 0.06, in order to extract their star formation histories. We combine a parametric description of the star formation history with a closed-box evolution of metallicity where the present-day gas-phase met…