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A New Window into Planet Formation and Migration: Refractory-to-Volatile Elemental Ratios in Ultra-hot Jupiters
Gibson, Neale P.; Sing, David K.; Wilson, Jamie +3 more
A primary goal of exoplanet characterization is to use a planet's current composition to understand how that planet formed. For example, the C/O ratio has long been recognized as carrying important information on the chemistry of volatile species. Refractory elements, like Fe, Mg, and Si, are usually not considered in this conversation because the…
Transient small-scale brightenings in the quiet solar corona: A model for campfires observed with Solar Orbiter
Berghmans, D.; Auchère, F.; Chen, Yajie +3 more
Context. Recent observations by the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter have characterized prevalent small-scale transient brightenings in the corona above the quiet Sun termed campfires.
Aims: In this study we search for comparable brightenings in a numerical model and then investigate their relation to the magnetic field…
Dust polarized emission observations of NGC 6334. BISTRO reveals the details of the complex but organized magnetic field structure of the high-mass star-forming hub-filament network
Kim, J.; Tamura, M.; Savini, G. +146 more
Context. Molecular filaments and hubs have received special attention recently thanks to new studies showing their key role in star formation. While the (column) density and velocity structures of both filaments and hubs have been carefully studied, their magnetic field (B-field) properties have yet to be characterized. Consequently, the role of B…
Mapping Obscuration to Reionization with ALMA (MORA): 2 mm Efficiently Selects the Highest-redshift Obscured Galaxies
Finkelstein, Steven L.; Casey, Caitlin M.; Long, Arianna S. +24 more
We present the characteristics of 2 mm selected sources from the largest Atacama Large Millimeter/submillimeter Array (ALMA) blank-field contiguous survey conducted to date, the Mapping Obscuration to Reionization with ALMA (MORA) survey covering 184 arcmin2 at 2 mm. Twelve of 13 detections above 5σ are attributed to emission from galax…
Gaia Early Data Release 3. Building the Gaia DR3 source list - Cross-match of Gaia observations
Biermann, M.; Lindegren, L.; Bastian, U. +12 more
Context. The Gaia Early Data Release 3 (Gaia EDR3) contains results derived from 78 billion individual field-of-view transits of 2.5 billion sources collected by the European Space Agency's Gaia mission during its first 34 months of continuous scanning of the sky.
Aims: We describe the input data, which have the form of onboard detections, an…
Reconnection nanojets in the solar corona
Antolin, Patrick; Pagano, Paolo; Testa, Paola +2 more
The solar corona is shaped and mysteriously heated to millions of degrees by the Sun's magnetic field. It has long been hypothesized that the heating results from a myriad of tiny magnetic energy outbursts called nanoflares, driven by the fundamental process of magnetic reconnection. Misaligned magnetic field lines can break and reconnect, produci…
Cloud busting: enstatite and quartz clouds in the atmosphere of 2M2224-0158
Gonzales, Eileen C.; Marley, Mark S.; Faherty, Jacqueline K. +7 more
We present the most detailed data-driven exploration of cloud opacity in a substellar object to-date. We have tested over 60 combinations of cloud composition and structure, particle-size distribution, scattering model, and gas phase composition assumptions against archival 1-15 µm spectroscopy for the unusually red L4.5 dwarf 2MASSW J222443…
Kiloparsec view of a typical star-forming galaxy when the Universe was ∼1 Gyr old. I. Properties of outflow, halo, and interstellar medium
Lutz, D.; Genzel, R.; Förster Schreiber, N. +9 more
We present new Atacama Large Millimeter/Submillimeter Array observations of the [C II] 158 µm transition and the dust continuum in HZ4, a typical star-forming galaxy when the Universe was only ∼1 Gyr old (z ≈ 5.5). Our high ≈0.3″ spatial resolution allows us to study the relationships between [C II] line emission, star formation rate, and fa…
SWEET-Cat 2.0: The Cat just got SWEETer. Higher quality spectra and precise parallaxes from Gaia eDR3
Adibekyan, V.; Hoyer, S.; Sousa, S. G. +13 more
Aims: The catalog of Stars With ExoplanETs (SWEET-Cat) was originally introduced in 2013. Since then many more exoplanets have been confirmed, increasing significantly the number of host stars listed there. A crucial step toward a comprehensive understanding of these new worlds is the precise and homogeneous characterization of their host sta…
A Family Tree of Optical Transients from Narrow-line Seyfert 1 Galaxies
Duev, Dmitry A.; Rusholme, Ben; Stern, Daniel +18 more
The Zwicky Transient Facility (ZTF) has discovered five events (0.01 < z < 0.4) belonging to an emerging class of active galactic nuclei (AGNs) undergoing smooth, large-amplitude, and rapidly rising flares. This sample consists of several transients initially classified as supernovae with narrow spectral lines. However, upon closer inspectio…