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TESS unveils the phase curve of WASP-33b. Characterization of the planetary atmosphere and the pulsations from the star
Mallonn, M.; von Essen, C.; Antoci, V. +4 more
We present the detection and characterization of the full-orbit phase curve and secondary eclipse of the ultra-hot Jupiter WASP-33b at optical wavelengths, along with the pulsation spectrum of the host star. We analyzed data collected by the Transiting Exoplanet Survey Satellite (TESS) in sector 18. WASP-33b belongs to a very short list of highly …
A Deep CFHT Optical Search for a Counterpart to the Possible Neutron Star-Black Hole Merger GW190814
Safi-Harb, Samar; Drout, Maria R.; Moon, Dae-Sik +10 more
We present a wide-field optical imaging search for electromagnetic counterparts to the likely neutron star-black hole (NS-BH) merger GW190814/S190814bv. This compact binary merger was detected through gravitational waves by the LIGO/Virgo interferometers, with masses suggestive of an NS-BH merger. We imaged the LIGO/Virgo localization region using…
UV and Lyα luminosity functions of galaxies and star formation rate density at the end of HI reionization from the VIMOS UltraDeep Survey (VUDS)
Maccagni, D.; Cimatti, A.; Ilbert, O. +25 more
Context. The star formation rate density (SFRD) evolution presents an area of great interest in the studies of galaxy evolution and reionization. The current constraints of SFRD at z > 5 are based on the rest-frame UV luminosity functions with the data from photometric surveys. The VIMOS UltraDeep Survey (VUDS) was designed to observe galaxies …
Near-ultraviolet Transmission Spectroscopy of HD 209458b: Evidence of Ionized Iron Beyond the Planetary Roche Lobe
France, Kevin; Cubillos, Patricio E.; Koskinen, Tommi +5 more
The inflated transiting hot Jupiter HD 209458b is one of the best studied objects since the beginning of exoplanet characterization. Transmission observations of this system between the mid-infrared and the far-ultraviolet have revealed the signature of atomic, molecular, and possibly aerosol species in the lower atmosphere of the planet, as well …
Short gamma-ray bursts within 200 Mpc
Troja, E.; Sakamoto, T.; Lien, A. Y. +5 more
We present a systematic search for short-duration gamma-ray bursts (GRBs) in the local Universe based on 14 yr of observations with the Neil Gehrels Swift Observatory. We cross-correlate the GRB positions with the GLADE catalogue of nearby galaxies, and find no event at a distance ≲100 Mpc and four plausible candidates in the range 100 Mpc ≲ D ≲ 2…
A robust estimate of the Milky Way mass from rotation curve data
Karukes, E. V.; Benito, M.; Iocco, F. +2 more
We present a new estimate of the mass of the Milky Way, inferred via a Bayesian approach by making use of tracers of the circular velocity in the disk plane and stars in the stellar halo, as from the publicly available galkin compilation. We use the rotation curve method to determine the dark matter distribution and total mass under different assu…
The CARMENES search for exoplanets around M dwarfs. Three temperate-to-warm super-Earths
Nagel, E.; Amado, P. J.; Bauer, F. F. +37 more
We announce the discovery of two planets orbiting the M dwarfs GJ 251 (0.360 ± 0.015M⊙) and HD 238090 (0.578 ± 0.021M⊙) based on CARMENES radial velocity (RV) data. In addition, we independently confirm with CARMENES data the existence of Lalande 21185 b, a planet that has recently been discovered with the SOPHIE spectrograph…
Deep transfer learning for star cluster classification: I. application to the PHANGS-HST survey
Kruijssen, J. M. Diederik; Chevance, Mélanie; Schruba, Andreas +13 more
We present the results of a proof-of-concept experiment that demonstrates that deep learning can successfully be used for production-scale classification of compact star clusters detected in Hubble Space Telescope(HST) ultraviolet-optical imaging of nearby spiral galaxies ( $D\lesssim 20\, \textrm{Mpc}$ ) in the Physics at High Angular Resolution …
High-resolution spectroscopy of flares and CMEs on AD Leonis
Guenther, E. W.; Mutabazi, T.; Jurua, E. +1 more
Context. Flares and coronal mass ejections (CMEs) are important for the evolution of the atmospheres of planets and their potential habitability, particularly for planets orbiting M stars at a distance <0.4 AU. Detections of CMEs on these stars have been sparse, and previous studies have therefore modelled their occurrence frequency by scaling …
The Variable and Non-variable X-Ray Absorbers in Compton-thin Type II Active Galactic Nuclei
Nikutta, Robert; Laha, Sibasish; Markowitz, Alex G. +3 more
We have conducted an extensive X-ray spectral variability study of a sample of 20 Compton-thin type II galaxies using broadband spectra from XMM-Newton, Chandra, and Suzaku. The aim is to study the variability of the neutral intrinsic X-ray obscuration along the line of sight and investigate the properties and location of the dominant component of…