output
19922026
most citedThe Seventh Data Release of the Sloan Digital Sky Survey

5.4k citations

Showing 2020 · astro-ph.SRShow all

26 papers · 2 filters

astro-ph.SR2020★ 4 cited

Analysis of Previously Classified White Dwarf-Main Sequence Binaries Using Data from the APOGEE Survey

Kyle A. Corcoran, Hannah M. Lewis, Borja Anguiano +12

We present analyses of near-infrared, spectroscopic data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey for 45 previously confirmed or candidate wh…

astro-ph.SR2020★ 37 cited

Untangling the Galaxy III: Photometric Search for Pre-main Sequence Stars with Deep Learning

Aidan McBride, Ryan Lingg, Marina Kounkel +2

A reliable census of pre-main sequence stars with known ages is critical to our understanding of early stellar evolution, but historically there has been difficulty in separating s…

astro-ph.SR2020★ 5 cited

CzeV1731: The unique doubly eclipsing quadruple system

P. Zasche, Z. Henzl, H. Lehmann +14

We report the discovery of the relatively bright (V = 10.5 mag), doubly eclipsing 2+2 quadruple system CzeV1731. This is the third known system of its kind, in which the masses are…

astro-ph.SR2020★ 17 cited

Robust asteroseismic properties of the bright planet host HD 38529

Warrick H. Ball, William J. Chaplin, Martin B. Nielsen +21

The Transiting Exoplanet Survey Satellite (TESS) is recording short-cadence, high duty-cycle timeseries across most of the sky, which presents the opportunity to detect and study o…

astro-ph.SR2020★ 12 cited

Geometry of the Draco C1 Symbiotic Binary

Hannah M. Lewis, Borja Anguiano, Keivan G. Stassun +14

Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion -- likely a white dwarf -- belonging to the Draco dwarf spheroidal gala…

astro-ph.SR2020★ 44 cited

TOI-811b and TOI-852b: New transiting brown dwarfs with similar masses and very different radii and ages from the TESS mission

Theron W. Carmichael, Samuel N. Quinn, George Zhou +17

We report the discovery of two transiting brown dwarfs (BDs), TOI-811b and TOI-852b, from NASA's Transiting Exoplanet Survey Satellite mission. These two transiting BDs have simila…

astro-ph.SR2020

Discovery of a young low-mass brown dwarf transiting a fast-rotating F-type star by the Galactic Plane eXoplanet (GPX) survey

P. Benni, A. Y. Burdanov, V. V. Krushinsky +64

We announce the discovery of GPX-1 b, a transiting brown dwarf with a mass of and a radius of , the first sub-stell…

astro-ph.SR2020★ 15 cited

Assessing Spectroscopic-Binary Multiplicity Properties Using Robo-AO Imaging

Emily Laos, Keivan G. Stassun, Robert D. Mathieu

We present higher-order multiplicity results for 60 solar-type spectroscopic binaries based on 0.75 micron imaging data taken by the Robotic Adaptive Optics system (Robo-AO) at the…

astro-ph.SR2020★ 33 cited

The Evolution of Rotation and Magnetic Activity in 94 Aqr Aa from Asteroseismology with TESS

Travis S. Metcalfe, Jennifer L. van Saders, Sarbani Basu +29

Most previous efforts to calibrate how rotation and magnetic activity depend on stellar age and mass have relied on observations of clusters, where isochrones from stellar evolutio…

astro-ph.SR2020★ 17 cited

Bow-shocks, nova shells, disc winds and tilted discs: The Nova-Like V341 Ara Has It All

N. Castro Segura, C. Knigge, J. A. Acosta-Pulido +21

V341 Ara was recently recognised as one of the closest (d ~ 150 pc) and brightest (V~ 10) nova-like cataclysmic variables. This unique system is surrounded by a bright emission neb…

astro-ph.SR2020★ 21 cited

Complex Modulation of Rapidly Rotating Young M Dwarfs: Adding Pieces to the Puzzle

Maximilian N. Günther, David A. Berardo, Elsa Ducrot +37

New sets of young M dwarfs with complex, sharp-peaked, and strictly periodic photometric modulations have recently been discovered with Kepler/K2 (scallop shells) and TESS (complex…

astro-ph.SR2020★ 21 cited

TOI 694 b and TIC 220568520 b: Two Low-Mass Companions Near the Hydrogen Burning Mass Limit Orbiting Sun-like Stars

Ismael Mireles, Avi Shporer, Nolan Grieves +40

We report the discovery of TOI 694 b and TIC 220568520 b, two low-mass stellar companions in eccentric orbits around metal-rich Sun-like stars, first detected by the Transiting Exo…

astro-ph.SR2020★ 59 cited

The Close Binary Fraction as a Function of Stellar Parameters in APOGEE: A Strong Anti-Correlation With Abundances

Christine N. Mazzola, Carles Badenes, Maxwell Moe +20

We use observations from the APOGEE survey to explore the relationship between stellar parameters and multiplicity. We combine high-resolution repeat spectroscopy for 41,363 dwarf…

astro-ph.SR2020★ 31 cited

Tess asteroseismology of the known planet host star Fornacis

M. B. Nielsen, W. H. Ball, M. R. Standing +22

The Transiting Exoplanet Survey Satellite (TESS) is observing bright known planet-host stars across almost the entire sky. These stars have been subject to extensive ground-based o…

astro-ph.SR2020★ 12 cited

TIC 278956474: Two close binaries in one young quadruple system, identified by \textit{TESS}

Pamela Rowden, Tamás Borkovits, Jon M. Jenkins +25

We have identified a quadruple system with two close eclipsing binaries in TESS data. The object is unresolved in Gaia and appears as a single source at parallax 1.08~0.01 mas…

astro-ph.SR2020★ 5 cited

Weighing stars from birth to death: mass determination methods across the HRD

Aldo Serenelli, Achim Weiss, Conny Aerts +31

The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of stellar archaeology and characteriza…

astro-ph.SR2020★ 29 cited

Rotationally Driven Ultraviolet Emission of Red Giant Stars

Don Dixon, Jamie Tayar, Keivan G. Stassun

Main sequence stars exhibit a clear rotation-activity relationship, in which rapidly rotating stars drive strong chromospheric/coronal ultraviolet and X-ray emission. While the vas…

astro-ph.SR2020★ 21 cited

TESS Asteroseismic Analysis of the Known Exoplanet Host Star HD 222076

Chen Jiang, Timothy R. Bedding, Keivan G. Stassun +24

The Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission aiming to search for exoplanets that transit bright stars. The high-quality photometric data of TESS a…

astro-ph.SR2020★ 19 cited

Spectral classification of B stars: The empirical sequence using SDSS-IV/APOGEE near-IR data

Valeria G. Ramírez-Preciado, Alexandre Román-Lópes, Carlos G. Román-Zuñiga +5

We present a semi-empirical spectral classification scheme for normal B-type stars using near-infrared spectra (1.5-1.7 m) from the SDSS APOGEE2-N DR14 database. The main motiva…

astro-ph.SR2020★ 15 cited

Simulating Solar Flare Irradiance with Multithreaded Models of Flare Arcades

Jeffrey W. Reep, Harry P. Warren, Christopher S. Moore +2

Understanding how energy is released in flares is one of the central problems of solar and stellar astrophysics. Observations of high temperature flare plasma hold many potential c…

astro-ph.SR2020★ 123 cited

The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones For Testing The Effects of Starspots on Structure and Colors

Garrett Somers, Lyra Cao, Marc H. Pinsonneault

One-dimensional stellar evolution models have been successful at representing the structure and evolution of stars in diverse astrophysical contexts, but complications have been no…

astro-ph.SR2020★ 48 cited

APOGEE Net: Improving the derived spectral parameters for young stars through deep learning

Richard Olney, Marina Kounkel, Chad Schillinger +6

Machine learning allows efficient extraction of physical properties from stellar spectra that have been obtained by large surveys. The viability of ML approaches has been demonstra…

astro-ph.SR2020★ 128 cited

Close Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude Diagram

Adrian M. Price-Whelan, David W. Hogg, Hans-Walter Rix +20

Many problems in contemporary astrophysics---from understanding the formation of black holes to untangling the chemical evolution of galaxies---rely on knowledge about binary stars…

astro-ph.SR2020★ 54 cited

Two intermediate-mass transiting brown dwarfs from the TESS mission

Theron W. Carmichael, Samuel N. Quinn, Alexander J. Mustill +28

We report the discovery of two intermediate-mass brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital peri…