Search Results - "Claytor, Zachary R."
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A Guide to Realistic Uncertainties on the Fundamental Properties of Solar-type Exoplanet Host Stars
Published in The Astrophysical journal (01-03-2022)“…Abstract Our understanding of the properties and demographics of exoplanets critically relies on our ability to determine the fundamental properties of their…”
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Journal Article -
2
TESS Stellar Rotation up to 80 Days in the Southern Continuous Viewing Zone
Published in The Astrophysical journal (01-02-2024)“…Abstract The Transiting Exoplanet Survey Satellite (TESS) mission delivers time-series photometry for millions of stars across the sky, offering a probe into…”
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Journal Article -
3
TESS Asteroseismology of β Hydri: A Subgiant with a Born-again Dynamo
Published in The Astrophysical journal (01-10-2024)“…Abstract The solar-type subgiant β Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was…”
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Journal Article -
4
Kepler-102: Masses and Compositions for a Super-Earth and Sub-Neptune Orbiting an Active Star
Published in The Astronomical journal (01-02-2023)“…Abstract Radial velocity (RV) measurements of transiting multiplanet systems allow us to understand the densities and compositions of planets unlike those in…”
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5
Recovery of TESS Stellar Rotation Periods Using Deep Learning
Published in The Astrophysical journal (01-03-2022)“…Abstract We used a convolutional neural network to infer stellar rotation periods from a set of synthetic light curves simulated with realistic spot-evolution…”
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6
Chemical Evolution in the Milky Way: Rotation-based Ages for APOGEE-Kepler Cool Dwarf Stars
Published in The Astrophysical journal (01-01-2020)“…We use models of stellar angular momentum evolution to determine ages for ∼500 stars in the APOGEE-Kepler Cool Dwarfs sample. We focus on lower-main-sequence…”
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7
Rotation Distributions around the Kraft Break with TESS and Kepler: The Influences of Age, Metallicity, and Binarity
Published in The Astrophysical journal (01-05-2022)“…Abstract Stellar rotation is a complex function of mass, metallicity, and age and can be altered by binarity. To understand the importance of these parameters…”
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8
Is [Y/Mg] a Reliable Age Diagnostic for FGK Stars?
Published in The Astrophysical journal (01-09-2022)“…Current spectroscopic surveys are producing large catalogs of chemical abundances for stars of all types. The yttrium-to-magnesium ratio, [Y/Mg], has emerged…”
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9
Magnetic Activity Evolution of Solar-like Stars. I. S ph–Age Relation Derived from Kepler Observations
Published in The Astrophysical journal (01-08-2023)“…Abstract The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually…”
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10
A close-in giant planet escapes engulfment by its star
Published in Nature (London) (29-06-2023)“…When main-sequence stars expand into red giants, they are expected to engulf close-in planets 1 – 5 . Until now, the absence of planets with short orbital…”
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11
TESS Asteroseismology of α Mensae: Benchmark Ages for a G7 Dwarf and Its M Dwarf Companion
Published in The Astrophysical journal (01-12-2021)“…Abstract Asteroseismology of bright stars has become increasingly important as a method to determine the fundamental properties (in particular ages) of stars…”
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12
The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI–1246
Published in The Astronomical journal (01-06-2022)“…Abstract Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with…”
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13
Magnetic Activity Evolution of Solar-like Stars. I. Sph–Age Relation Derived from Kepler Observations
Published in The Astrophysical journal (01-08-2023)“…The ages of solar-like stars have been at the center of many studies such as exoplanet characterization or Galactic-archeology. While ages are usually computed…”
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14
Rotational Characterization of TESS Stars with Deep Learning
Published 01-01-2022“…Rotation is a fundamental property of stars. The Kepler mission revolutionized the field of stellar rotation, delivering periods of over 50,000 stars near the…”
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Dissertation -
15
Worry No More, The Hubble Tension is Relieved: A Truly Direct Measurement of the Hubble Constant from Mooniversal Expansion
Published 30-03-2022“…Using sedimentary and eclipse-based measurements of the lunar recession velocity, we derive a new local-Universe measurement of the Hubble constant ($H_0$)…”
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16
TESS Stellar Rotation up to 80 days in the Southern Continuous Viewing Zone
Published 11-07-2023“…The TESS mission delivers time-series photometry for millions of stars across the sky, offering a probe into stellar astrophysics, including rotation, on a…”
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Journal Article -
17
Evidence of Truly Young high-$\alpha$ Dwarf Stars
Published 03-10-2024“…The existence of high-$\alpha$ stars with inferred ages < 6 Gyr has been confirmed recently with large spectroscopic and photometric surveys. However, stellar…”
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Journal Article -
18
TESS asteroseismology of $\beta$ Hydri: a subgiant with a born-again dynamo
Published 10-08-2024“…Astrophys. J. 974, 31 (2024) The solar-type subgiant $\beta$ Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been…”
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Journal Article -
19
Is [Y/Mg] a Reliable Age Diagnostic for FGK Stars?
Published 04-08-2022“…Current spectroscopic surveys are producing large catalogs of chemical abundances for stars of all types. The yttrium to magnesium ratio, [Y/Mg], has emerged…”
Get full text
Journal Article -
20
Recovery of TESS Stellar Rotation Periods Using Deep Learning
Published 29-04-2021“…We used a convolutional neural network to infer stellar rotation periods from a set of synthetic light curves simulated with realistic spot evolution patterns…”
Get full text
Journal Article