Search Publications
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…
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…
Chromospheric Activity of M Stars Based on LAMOST Low- and Medium-resolution Spectral Surveys
Shi, Jianrong; Han, Xianming L.; Misra, Prabhakar +5 more
We have used the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) low-resolution and medium-resolution spectroscopic surveys to explore the chromospheric statistical properties and variations of M stars. There are 738,477 LAMOST low-resolution spectra of 622,523 M stars. We have calculated equivalent widths of the Ca II H&K, …
Data-driven Spectroscopic Estimates of Absolute Magnitude, Distance, and Binarity: Method and Catalog of 16,002 O- and B-type Stars from LAMOST
Yuan, Hai-Bo; Xiang, Maosheng; Ting, Yuan-Sen +4 more
We present a data-driven method to estimate absolute magnitudes for O- and B-type stars from the LAMOST spectra, which we combine with Gaia DR2 parallaxes to infer distance and binarity. The method applies a neural network model trained on stars with precise Gaia parallax to the spectra and predicts Ks-band absolute magnitudes ${M}_{K{\…
Giant Radio Quasars: Sample and Basic Properties
Jamrozy, Marek; Kuźmicz, Agnieszka
We present the largest sample of giant radio quasars (GRQs), which are defined as having a projected linear size greater than 0.7 Mpc. The sample consists of 272 GRQs, of which 174 are new objects discovered through cross-matching the NRAO Very Large Array Sky Survey and the Sloan Digital Sky Survey 14th Data Release Quasar Catalog (DR14Q) and con…
A Hubble Space Telescope Imaging Survey of Low-redshift Swift-BAT Active Galaxies
Ho, Luis C.; Barth, Aaron J.; Kim, Minjin +1 more
We present initial results from a Hubble Space Telescope snapshot imaging survey of the host galaxies of Swift-BAT active galactic nuclei (AGN) at z < 0.1. The hard X-ray selection makes this sample relatively unbiased in terms of obscuration, compared to optical AGN selection methods. The high-resolution images of 154 target AGN enable us to i…
Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data
Troja, E.; Caraveo, P. A.; Mirabal, N. +114 more
We present the first Fermi Large Area Telescope (LAT) catalog of long-term γ-ray transient sources (1FLT). This comprises sources that were detected on monthly time intervals during the first decade of Fermi-LAT operations. The monthly timescale allows us to identify transient and variable sources that were not yet reported in other Fermi-LAT cata…
Multiwavelength Properties of Miras
Udalski, Andrzej; Szymański, Michał K.; Skowron, Jan +12 more
We comprehensively study the variability of Miras in the Large Magellanic Cloud by simultaneously analyzing light curves in 14 bands in the range of 0.5-24 µm. We model over 20 yr long, high-cadence I-band light curves collected by the Optical Gravitational Lensing Experiment (OGLE) and fit them to light curves collected in the remaining opt…
Astro-COLIBRI-The COincidence LIBrary for Real-time Inquiry for Multimessenger Astrophysics
Becker Tjus, J.; Lefranc, V.; Schüssler, F. +4 more
Astro-COLIBRI is a novel tool that evaluates alerts of transient observations in real time, filters them by user-specified criteria, and puts them into their multiwavelength and multimessenger context. Through fast generation of an overview of persistent sources as well as transient events in the relevant phase space, Astro-COLIBRI contributes to …
Atomic Transition Probabilities of Neutral Calcium
Sneden, C.; Sobeck, J.; Roederer, I. U. +3 more
The goals of this study are (1) to test the best theoretical transition probabilities for Ca I (a relatively light alkaline earth spectrum) from a modern ab initio calculation using configuration interaction plus many-body perturbation theory against the best modern experimental transition probabilities and (2) to produce as accurate and comprehen…