Search Results - "Gizis, John E."
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Simultaneous Multiwavelength Flare Observations of EV Lacertae
Published in The Astrophysical journal (01-11-2021)“…We present the first results of our ongoing project conducting simultaneous multiwavelength observations of flares on nearby active M dwarfs. We acquired data…”
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K2 Ultracool Dwarfs Survey. IV. Monster Flares Observed on the Young Brown Dwarf CFHT-BD-Tau 4
Published in The Astrophysical journal (10-07-2018)“…We present photometric measurements of two superflares observed on a very young brown dwarf, CFHT-BD-Tau 4, observed during Campaign 13 of the Kepler K2…”
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RI photometry of 2MASS-selected late M and L dwarfs
Published in Publications of the Astronomical Society of the Pacific (01-05-2006)Get full text
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K2 Ultracool Dwarfs Survey. III. White Light Flares Are Ubiquitous in M6-L0 Dwarfs
Published in The Astrophysical journal (01-05-2018)“…We report the white light flare rates for 10 ultracool dwarfs using Kepler K2 short-cadence data. Among our sample stars, two have spectral type M6, three are…”
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LSST Survey Strategies and Brown Dwarf Parallaxes
Published in The Astrophysical journal. Supplement series (01-12-2022)“…Abstract The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) has the potential to measure parallaxes for thousands of nearby ultracool…”
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K2 Ultracool Dwarfs Survey. II. The White Light Flare Rate of Young Brown Dwarfs
Published in The Astrophysical journal (10-08-2017)“…We use Kepler K2 Campaign 4 short-cadence (one-minute) photometry to measure white light flares in the young, moving group brown dwarfs 2MASS J03350208+2342356…”
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SpeX SPECTROSCOPY OF UNRESOLVED VERY LOW MASS BINARIES. II. IDENTIFICATION OF 14 CANDIDATE BINARIES WITH LATE-M/EARLY-L AND T DWARF COMPONENTS
Published in The Astrophysical journal (20-10-2014)“…Multiplicity is a key statistic for understanding the formation of very low mass (VLM) stars and brown dwarfs. Currently, the separation distribution of VLM…”
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The Elusive Majority of Young Moving Groups. I. Young Binaries and Lithium-rich Stars in the Solar Neighborhood
Published in The Astrophysical journal (20-05-2019)“…Young stars in the solar neighborhood serve as nearby probes of stellar evolution and represent promising targets to directly image self-luminous giant…”
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KEPLER MONITORING OF AN L DWARF I. THE PHOTOMETRIC PERIOD AND WHITE LIGHT FLARES
Published in The Astrophysical journal (20-12-2013)“…We report on the results of 15 months of monitoring the nearby field L1 dwarf WISEP J190648.47+401106.8 (W1906+40) with the Kepler mission. Supporting…”
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Brown Dwarfs and the TW Hydrae Association
Published in The Astrophysical journal (10-08-2002)Get full text
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K2 Ultracool Dwarfs Survey. I. Photometry of an L Dwarf Superflare
Published in The Astrophysical journal (20-03-2017)“…We report on K2 Campaign 8 measurements of a huge white light flare on the L1 dwarf SDSSp J005406.55-003101.8 (EPIC 220186653). The source is a typical L1…”
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WISEP J004701.06+680352.1: AN INTERMEDIATE SURFACE GRAVITY, DUSTY BROWN DWARF IN THE AB DOR MOVING GROUP
Published in The Astrophysical journal (01-02-2015)“…We present spectroscopy, astrometry, and photometry of the brown dwarf WISEP J004701.06+680352.1 (W0047+68), an unusually red field L dwarf at a distance of…”
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THE FIRST DETECTION OF PHOTOMETRIC VARIABILITY IN A Y DWARF: WISE J140518.39+553421.3
Published in The Astrophysical journal (01-06-2016)“…ABSTRACT We present the first detection of the photometric variability in a spectroscopically confirmed Y dwarf. The Infrared Array Camera on board the Spitzer…”
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A MULTIPLICITY CENSUS OF INTERMEDIATE-MASS STARS IN SCORPIUS-CENTAURUS
Published in The Astrophysical journal (20-08-2013)“…Stellar multiplicity properties have been studied for the lowest and the highest stellar masses, but intermediate-mass stars from F-type to late A-type have…”
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Herschel Observations of Disks around Late-type Stars
Published in Publications of the Astronomical Society of the Pacific (01-08-2020)“…A set of twenty late-type (K5-M5) stars were observed with the Herschel Space Observatory at 100 and 160 microns with the goal of searching for far-infrared…”
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New Brown Dwarf Disks in the TW Hydrae Association
Published in The Astrophysical journal (10-07-2008)“…In our analysis of Spitzer IRS archival data on the stellar and substellar members of the TW Hydrae association (TWA), we have discovered two new brown dwarf…”
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3.8 μm Imaging of 400–600 K Brown Dwarfs and Orbital Constraints for WISEP J045853.90+643452.6AB
Published in The Astrophysical journal (10-09-2019)“…Abstract Half of the energy emitted by late-T- and Y-type brown dwarfs emerges at 3.5 ≤ λ μ m ≤ 5.5. We present new L ′ (3.43 ≤ λ μ m ≤ 4.11) photometry…”
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NEPTUNE'S DYNAMIC ATMOSPHERE FROM KEPLER K2 OBSERVATIONS: IMPLICATIONS FOR BROWN DWARF LIGHT CURVE ANALYSES
Published in The Astrophysical journal (01-02-2016)“…ABSTRACT Observations of Neptune with the Kepler Space Telescope yield a 49 day light curve with 98% coverage at a 1 minute cadence. A significant signature in…”
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M dwarfs and the fraction of high carbon-to-oxygen stars in the solar neighbourhood
Published in Monthly notices of the Royal Astronomical Society (01-02-2016)“…We investigate the frequency of high carbon-to-oxygen (C/O = 0.9) M dwarf stars in the solar neighbourhood. Using synthetic spectra, we find that such M dwarfs…”
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DISCOVERY OF AN L4β CANDIDATE MEMBER OF ARGUS IN THE PLANETARY MASS REGIME: WISE J231921.92+764544.4
Published in The Astrophysical journal (10-01-2016)“…ABSTRACT We present the discovery of a young L dwarf, WISE J231921.92+764544.4, identified by comparing the Wide-field Infrared Survey Explorer (WISE) All-Sky…”
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