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Spectroscopic Mass and Host-star Metallicity Measurements for Newly Discovered Microlensing Planet OGLE-2018-BLG-0740Lb
Kollmeier, Juna A.; Morrell, Nidia; Han, Cheongho +67 more
We report the discovery of the microlensing planet OGLE-2018-BLG-0740Lb. The planet is detected with a very strong signal of Δχ 2 ∼ 4630, but the interpretation of the signal suffers from two types of degeneracies. One type is caused by the previously known close/wide degeneracy, and the other is caused by an ambiguity between two solut…
Dwarfs or Giants? Stellar Metallicities and Distances from ugrizG Multiband Photometry
Lewis, Geraint F.; Jensen, Jaclyn; Navarro, Julio F. +19 more
We present a new fully data-driven algorithm that uses photometric data from the Canada-France Imaging Survey (CFIS; u), Pan-STARRS 1 (PS1; griz), and Gaia (G) to discriminate between dwarf and giant stars and to estimate their distances and metallicities. The algorithm is trained and tested using the Sloan Digital Sky Survey (SDSS)/SEGUE spectros…
Reconnection Front Associated with Asymmetric Magnetic Reconnection: Particle-in-cell Simulations
Zhou, Meng; Deng, Xiaohua; Zhong, Zhihong +2 more
Reconnection front (RF) has frequently been observed in the magnetotail and is well known as the dipolarization front in the near-Earth tail. Whether the RF exists in reconnection with distinct plasma/field properties across the reconnecting current sheet (i.e., asymmetric reconnection) is unknown yet. In this Letter, we use 2.5D particle-in-cell …
Tycho's Supernova: The View from Gaia
Bedin, Luigi R.; Ruiz-Lapuente, Pilar; Figueras, Francesca +6 more
SN 1572 (Tycho Brahe’s supernova) clearly belongs to the Ia (thermonuclear) type. It was produced by the explosion of a white dwarf (WD) in a binary system. Its remnant has been the first of this type to be explored in search of a possible surviving companion, the mass donor that brought the WD to the point of explosion. A high peculiar motion wit…
Synthetic 26Al emission from galactic-scale superbubble simulations
Diehl, R.; Rodgers-Lee, D.; Krause, M. G. H. +1 more
Emission from the radioactive trace element 26Al has been observed throughout the Milky Way with the COMPTEL and INTEGRAL satellites. In particular, the Doppler shifts measured with INTEGRAL connect 26Al with superbubbles, which may guide 26Al flows off spiral arms in the direction of Galactic rotation. In order to…
SN 2018hna: 1987A-like Supernova with a Signature of Shock Breakout
Maehara, Hiroyuki; Tominaga, Nozomu; Sasada, Mahito +22 more
High-cadence ultraviolet, optical, and near-infrared photometric and low-resolution spectroscopic observations of the peculiar Type II supernova (SN) 2018hna are presented. The early-phase multiband light curves (LCs) exhibit the adiabatic cooling envelope emission following the shock breakout up to ∼ 14 days from the explosion. SN 2018hna has a r…
Joint hard X-ray observations with ASO-S/HXI and SO/STIX
Krucker, Säm; Su, Yang; Hurford, Gordon J. +1 more
This paper discusses the potential of future joint hard X-ray solar flare observations between the Hard X-ray Imager (HXI) onboard the Advanced Space-based Solar Observatory (ASO-S) mission and the Spectrometer/Telescope for Imaging X-rays (STIX) on Solar Orbiter. The different viewing perspectives of the two telescopes relative to the Sun will al…
WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts
Bouchy, F.; Queloz, D.; Ségransan, D. +20 more
We report the discovery of four transiting hot Jupiters, WASP-147, WASP-160B, WASP-164, and WASP-165 from the WASP survey. WASP-147b is a near Saturn-mass (MP = 0.28MJ) object with a radius of 1.11 {{R}J} orbiting a G4 star with a period of 4.6 d. WASP-160Bb has a mass and radius (M_p = 0.28 {{M}J}, R_p …
Spatially Resolved Properties of Galaxies from CANDELS+MUSE: Radial Extinction Profile and Insights on Quenching
Mobasher, Bahram; Jafariyazani, Marziye; Hemmati, Shoubaneh +3 more
Studying the internal processes of individual galaxies at kilo-parsec scales is crucial in enhancing our understanding of galaxy formation and evolution processes. In this work, we investigate the distribution of star formation rate (SFR), specific SFR (sSFR), and dust attenuation across individual galaxies for a sample of 32 galaxies selected fro…
Solar Flare Forecasting from Magnetic Feature Properties Generated by the Solar Monitor Active Region Tracker
Bloomfield, D. Shaun; Domijan, Katarina; Pitié, François
We study the predictive capabilities of magnetic-feature properties (MF) generated by the Solar Monitor Active Region Tracker (SMART: Higgins et al. in Adv. Space Res.47, 2105, 2011) for solar-flare forecasting from two datasets: the full dataset of SMART detections from 1996 to 2010 which has been previously studied by Ahmed et al. (Solar Phys.28…