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Multipoint Interplanetary Coronal Mass Ejections Observed with Solar Orbiter, BepiColombo, Parker Solar Probe, Wind, and STEREO-A
Möstl, Christian; Davies, Emma E.; Freiherr von Forstner, Johan L. +12 more
We report the result of the first search for multipoint in situ and imaging observations of interplanetary coronal mass ejections (ICMEs) starting with the first Solar Orbiter (SolO) data in 2020 April-2021 April. A data exploration analysis is performed including visualizations of the magnetic-field and plasma observations made by the five spacec…
The Pristine survey - XVI. The metallicity of 26 stellar streams around the Milky Way detected with the STREAMFINDER in Gaia EDR3
Sestito, Federico; McConnachie, Alan W.; Malhan, Khyati +21 more
We use the photometric metallicities provided by the panoramic Pristine survey to study the veracity and derive the metallicities of the numerous stellar streams found by the application of the STREAMFINDER algorithm to the Gaia Early Data Release 3 data. All 26 streams present in Pristine show a clear metallicity distribution function, which prov…
Early Results from GLASS-JWST. IV. Spatially Resolved Metallicity in a Low-mass z 3 Galaxy with NIRISS
Calabrò, Antonello; Castellano, Marco; Fontana, Adriano +19 more
We report the first gas-phase metallicity map of a distant galaxy measured with the James Webb Space Telescope (JWST). We use the NIRISS slitless spectroscopy acquired by the GLASS Early Release Science program to spatially resolve the rest-frame optical nebular emission lines in a gravitationally lensed galaxy at z = 3.06 behind the A2744 galaxy …
The TESS-Keck Survey: Science Goals and Target Selection
Batalha, Natalie M.; Bieryla, Allyson; Latham, David W. +62 more
The Kepler and TESS missions have demonstrated that planets are ubiquitous. However, the success of these missions heavily depends on ground-based radial velocity (RV) surveys, which combined with transit photometry can yield bulk densities and orbital properties. While most Kepler host stars are too faint for detailed follow-up observations, TESS…
Detection of the tidal deformation of WASP-103b at 3 σ with CHEOPS
Alonso, R.; Bouchy, F.; Deleuil, M. +80 more
Context. Ultra-short period planets undergo strong tidal interactions with their host star which lead to planet deformation and orbital tidal decay.
Aims: WASP-103b is the exoplanet with the highest expected deformation signature in its transit light curve and one of the shortest expected spiral-in times. Measuring the tidal deformation of th…
BACCHUS Analysis of Weak Lines in APOGEE Spectra (BAWLAS)
Cunha, Katia; Smith, Verne V.; Majewski, Steven R. +11 more
Elements with weak and blended spectral features in stellar spectra are challenging to measure and require specialized analysis methods to precisely measure their chemical abundances. In this work, we have created a catalog of approximately 120,000 giants with high signal-to-noise Apache Point Observatory Galactic Evolution Experiment (APOGEE) Dat…
A white dwarf accreting planetary material determined from X-ray observations
Wheatley, Peter J.; Gänsicke, Boris T.; Veras, Dimitri +4 more
The atmospheres of a large proportion of white dwarf stars are polluted by heavy elements1 that are expected to sink out of visible layers on short timescales2,3. This has been interpreted as a signature of ongoing accretion of debris from asteroids4, comets5 and giant planets6. This scenario …
The star formation history of Upper Scorpius and Ophiuchus. A 7D picture: positions, kinematics, and dynamical traceback ages
Miret-Roig, N.; Bouy, H.; Alves, J. +3 more
Context. Understanding how star formation begins and propagates through molecular clouds is a fundamental but still open question. One major difficulty in addressing this question is the lack of precise 3D kinematics and age information for young stellar populations. Thanks to astrometry provided by Gaia, large spectroscopic surveys, and improved …
The Physical Properties of Luminous z ≳ 8 Galaxies and Implications for the Cosmic Star Formation Rate Density from 0.35 deg2 of (Pure-)Parallel HST Observations
Treu, Tommaso; Trenti, Michele; Morishita, Takahiro +2 more
We present the largest systematic, Hubble Space Telescope (HST)-based search to date for luminous z ≳ 8 galaxy candidates using ~1267 arcmin2 of (pure-)parallel observations from a compilation of 288 random sightlines with Advanced Camera for Surveys and Wide Field Camera 3 observations, derived from the (Super)Brightest of Reionizing G…
The IACOB project. VII. The rotational properties of Galactic massive O-type stars revisited
Herrero, A.; Simón-Díaz, S.; Barbá, R. H. +1 more
Context. Stellar rotation is of key importance in the formation process, the evolution, and the final fate of massive stars.
Aims: We perform a reassessment of the empirical rotational properties of Galactic massive O-type stars using the results from a detailed analysis of ground-based multi-epoch optical spectra obtained in the framework of…