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A New Catalog of Asymptotic Giant Branch Stars in Our Galaxy
Suh, Kyung-Won
We present a new catalog of 11,209 O-rich asymptotic giant branch (AGB) stars and 7172 C-rich AGB stars in our Galaxy, identifying more AGB stars in the bulge component and considering more visual carbon stars. For each object, we cross-identify the Infrared Astronomical Satellite (IRAS), AKARI, Midcourse Space Experiment, Wide-field Infrared Surv…
Sixty Years of Element Abundance Measurements in Solar Energetic Particles
Reames, Donald V.
Sixty years ago the first observation was published showing solar energetic particles (SEPs) with a sampling of chemical elements with atomic numbers 6 ≤Z ≤18 above 40 MeV amu−1. Thus began study of the direct products of dynamic physics in the solar corona. As we have progressed from 4-min sounding-rocket samples to continuous satellit…
BALRoGO: Bayesian Astrometric Likelihood Recovery of Galactic Objects - Global properties of over one hundred globular clusters with Gaia EDR3
Vitral, Eduardo
We present BALRoGO: Bayesian Astrometric Likelihood Recovery of Galactic Objects, a public code to measure the centres, effective radii, and bulk proper motions of Milky Way (MW) globular clusters and Local Group dwarf spheroidals, whose data are mixed with MW field stars. Our approach presents innovative methods such as surface density fits allow…
First dust measurements with the Solar Orbiter Radio and Plasma Wave instrument
Maksimovic, M.; Bale, S. D.; Chust, T. +20 more
Context. Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals (as may be expected) are routinely detected by the Time Domain Sampler (TDS) system of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter.
Aims: We in…
Transiting Exoplanet Survey Satellite (TESS) Observations of Flares and Quasi-Periodic Pulsations from Low-Mass Stars and Potential Impact on Exoplanets
Ramsay, Gavin; Doyle, Lauren; Doyle, J. Gerry +1 more
We have performed a search for flares and quasi-periodic pulsations (QPPs) from low-mass M-dwarf stars using Transient Exoplanet Survey Satellite (TESS) two-minute cadence data. We find seven stars that show evidence of QPPs. Using Fourier and empirical mode decomposition techniques, we confirm the presence of 11 QPPs in these seven stars with a p…
Heliosheath Proton Distribution in the Plasma Reference Frame
McComas, D. J.; Dayeh, M. A.; Swaczyna, P. +2 more
Properties of the inner heliosheath (IHS) plasma are inferred from energetic neutral atom (ENA) observations by ∼1 au spacecraft. However, the Compton-Getting effect due to the plasma velocity relative to the spacecraft is rarely taken into account, even though the plasma speed is a significant fraction of the ENA speed. In this study, we transfor…
Long-term and multiwavelength evolution of a changing-look AGN Mrk 1018
Wu, Qingwen; Lyu, Bing; Yan, Zhen +1 more
The physical mechanism for triggering the changing-look phenomenon in active galactic nuclei (AGNs) is still unclear. We explore this issue based on the multiwavelength spectral and flux variations for a changing-look AGN Mrk 1018 with long-term observations in the X-ray, optical/ultraviolet (UV), and radio bands. Both the optical and the X-ray em…
Kinematics and star formation toward W33: a central hub as a hub-filament system
Zhang, Chuan-Peng; Wang, Jun-Jie; Xu, Jin-Long +4 more
Aims: We investigate the gas kinematics and physical properties toward the W33 complex and its surrounding filaments. We study clump formation and star formation in a hub-filament system.
Methods: We performed a large-scale mapping observation toward the W33 complex and its surroundings, covering an area of 1.3° × 1.0°, in 12C…
A Homogeneous Comparison between the Chemical Composition of the Large Magellanic Cloud and the Sagittarius Dwarf Galaxy
Bellazzini, M.; Mucciarelli, A.; Origlia, L. +3 more
Similarities in the chemical composition of two of the closest Milky Way satellites, namely, the Large Magellanic Cloud (LMC) and the Sagittarius (Sgr) dwarf galaxy, have been proposed in the literature, suggesting similar chemical enrichment histories between the two galaxies. This proposition, however, rests on different abundance analyses, whic…
Observations of the Quiet Sun during the Deepest Solar Minimum of the Past Century with Chandrayaan-2 XSM: Sub-A-class Microflares outside Active Regions
Joshi, Bhuwan; Janardhan, P.; Bhardwaj, Anil +12 more
Solar flares, with energies ranging over several orders of magnitude, result from impulsive release of energy due to magnetic reconnection in the corona. Barring a handful, almost all microflares observed in X-rays are associated with the solar active regions. Here we present, for the first time, a comprehensive analysis of a large sample of quiet…