Search Publications
Deep Orbital Search for Additional Planets in the HR 8799 System
Do Ó, Clarissa R.; De Rosa, Robert J.; Macintosh, Bruce +6 more
The HR 8799 system hosts four massive planets orbiting 15 and 80 au. Studies of the system's orbital stability and its outer debris disk open the possibility of additional planets, both interior to and exterior to the known system. Reaching a sufficient sensitivity to search for interior planets is very challenging due to the combination of bright…
Type II-P supernova progenitor star initial masses and SN 2020jfo: direct detection, light-curve properties, nebular spectroscopy, and local environment
Kilpatrick, Charles D.; Izzo, Luca; Bentley, Rory O. +23 more
We present optical, ultraviolet, and infrared data of the type II supernova (SN II) 2020jfo at 14.5 Mpc. This wealth of multiwavelength data allows us to compare different metrics commonly used to estimate progenitor masses of SN II for the same object. Using its early light curve, we infer SN 2020jfo had a progenitor radius of ≈700 R⊙,…
Evolution of the Lyman-α-emitting fraction and UV properties of lensed star-forming galaxies in the range 2.9 < z < 6.7
Richard, J.; Pello, R.; Tuan-Anh, P. +6 more
Context. Faint galaxies are theorised to have played a major role, perhaps the dominant role, in reionising the Universe. Their properties, as well as the Lyman-α emitter (LAE) fraction, XLAE, could provide useful insights into this epoch.
Aims: We used four clusters of galaxies from the Lensed Lyman-alpha MUSE Arcs Sample (LLAMAS)…
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) …