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Forbidden hugs in pandemic times. IV. Panchromatic evolution of three luminous red novae
Fugazza, D.; Lundqvist, P.; Reichart, D. E. +77 more
We present photometric and spectroscopic data on three extragalactic luminous red novae (LRNe):
The high-albedo, low polarization disk around HD 114082 that harbors a Jupiter-sized transiting planet. Constraints from VLT/SPHERE completed with TESS, Gaia, and radial velocities
Ménard, F.; Marshall, J. P.; del Burgo, C. +36 more
Aims: We present new optical and near-infrared images of the debris disk around the F-type star HD 114082 in the Scorpius-Centaurus OB association. We obtained direct imaging observations and analyzed the TESS photometric time series data of this target with the goal of searching for planetary companions to HD 114082 and characterizing the mo…
AGN STORM 2. II. Ultraviolet Observations of Mrk 817 with the Cosmic Origins Spectrograph on the Hubble Space Telescope
Gorjian, Varoujan; Treu, Tommaso; Kaspi, Shai +62 more
We present reverberation mapping measurements for the prominent ultraviolet broad emission lines of the active galactic nucleus Mrk 817 using 165 spectra obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope. Our ultraviolet observations are accompanied by X-ray, optical, and near-infrared observations as part of the AGN Spac…
Detection of open cluster rotation fields from Gaia EDR3 proper motions
Krone-Martins, A.; Moitinho, A.; Guilherme-Garcia, P.
Context. Most stars from in groups which with time disperse, building the field population of their host galaxy. In the Milky Way, open clusters have been continuously forming in the disk up to the present time, providing it with stars spanning a broad range of ages and masses. Observations of the details of cluster dissolution are, however, scarc…
The ages and metallicities of the globular clusters in the Sparkler
Adamo, Angela; Claeyssens, Adélaïde; Usher, Christopher +1 more
JWST observations of the strongly lensed galaxy the Sparkler have revealed a population of gravitationally bound globular cluster (GC) candidates. Different analyses have resulted in broadly similar ages but significantly different metallicities, questioning the assembly history that has led to the formation of such a population. In this letter, w…
Identifying the energy release site in a solar microflare with a jet
Monstein, Christian; Krucker, Säm; Veronig, Astrid M. +10 more
Context. One of the main science questions of the Solar Orbiter and Parker Solar Probe missions deals with understanding how electrons in the lower solar corona are accelerated and how they subsequently access interplanetary space.
Aims: We aim to investigate the electron acceleration and energy release sites as well as the manner in which ac…
Catalog of Magnetic White Dwarfs with Hydrogen Dominated Atmospheres
Kepler, S. O.; Jordan, S.; Romero, A. D. +2 more
White dwarfs are excellent research laboratories as they reach temperatures, pressures, and magnetic fields that are unattainable on Earth. To better understand how these three physical parameters interact with each other and with other stellar features, we determined the magnetic field strength for a total of 804 hydrogen-rich white dwarfs (WDs) …
Solar cycle variation of ion escape from Mars
Barabash, Stas; Nilsson, Hans; Zhang, Qi +6 more
Using Mars Express data from 2007 until 2020 we show how ion outflow from Mars varied over more than a solar cycle, from one solar minimum to another. The data was divided into intervals with a length of one Martian year, starting from 30 April 2007 and ending 13 July 2020. The net escape rate was about 5 × 1024s-1 in the fir…
Compton-thick AGN in the NuSTAR Era X: Analysing seven local CT-AGN candidates
Pozzi, F.; Vignali, C.; Gilli, R. +14 more
Context. We present the broad-band X-ray spectral analysis (0.6-50 keV) of seven Compton-thick active galactic nuclei (CT-AGN; line-of-sight (LOS) column density > 1024 cm−2) candidates selected from the Swift-BAT 100 month catalogue using archival NuSTAR data.
Aims: We aim to obtain a complete census of the heavily o…
The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems
Anderson, Jay; Dattilo, Anne; Batalha, Natalie M. +45 more
With JWST's successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for characterizing the atmospheres of small exoplanets via transmission spectroscopy. Using a carefully curated target list and observations from more than 2 yr of APF-Levy and …