Now showing items 1-10 of 10

• #### Calibration of the MEarth Photometric System: Optical Magnitudes and Photometric Metallicity Estimates for 1802 Nearby M-dwarfs ﻿

(American Astronomical Society, 2016)
The MEarth Project is a photometric survey systematically searching the smallest stars nearest to the Sun for transiting rocky planets. Since 2008, MEarth has taken approximately two million images of 1844 stars suspected ...
• #### An Empirical Calibration to Estimate Cool Dwarf Fundamental Parameters From H-Band Spectra ﻿

(IOP Publishing, 2015)
Interferometric radius measurements provide a direct probe of the fundamental parameters of M dwarfs. However, interferometry is within reach for only a limited sample of nearby, bright stars. We use interferometrically ...
• #### The Evolution of Rotation and Magnetism in Small Stars Near the Sun ﻿

(2016-05-19)
Despite the prevalence of M dwarfs, the smallest and most common type of main sequence star, their sizes, compositions, and ages are not well-constrained. Empirical determination of these properties is important for gaining ...
• #### Exoplanet Characterization by Proxy: A Transiting 2.15 R⊕ Planet Near the Habitable Zone of the Late K Dwarf Kepler-61 ﻿

(IOP Publishing, 2013)
We present the validation and characterization of Kepler-61b: a 2.15 R ⊕ planet orbiting near the inner edge of the habitable zone of a low-mass star. Our characterization of the host star Kepler-61 is based upon a comparison ...
• #### The Impact of Stellar Rotation on the Detectability of Habitable Planets Around M Dwarfs ﻿

(American Astronomical Society, 2016)
Stellar activity and rotation frustrate the detection of exoplanets through the radial velocity technique. This effect is particularly of concern for M dwarfs, which can remain magnetically active for billions of years. ...
• #### The MEarth-North and MEarth-South transit surveys: searching for habitable super-Earth exoplanets around nearby M-dwarfs ﻿

(2014)
Detection and characterization of potentially habitable Earthsize extrasolar planets is one of the major goals of contemporary astronomy. By applying the transit method to very low-mass M-dwarfs, it is possible to find ...
• #### Near-Infrared Metallicities, Radial Velocities and Spectral Types for 447 Nearby M Dwarfs ﻿

(IOP Publishing, 2013)
We present metallicities, radial velocities, and near-infrared (NIR) spectral types for 447 M dwarfs determined from moderate resolution (R ≈ 2000) NIR spectra obtained with the NASA Infrared Telescope Facility (IRTF)/SpeX. ...
• #### A rocky planet transiting a nearby low-mass star ﻿

(Springer Nature, 2015)
M-dwarf stars – hydrogen-burning stars that are smaller than 60 per cent of the size of the Sun – are the most common class of star in our Galaxy and outnumber Sun-like stars by a ratio of 12:1. Recent results have shown ...
• #### The Rotation and Galactic Kinematics of Mid M Dwarfs in the Solar Neighborhood ﻿

(American Astronomical Society, 2016)
Rotation is a directly observable stellar property, and it drives magnetic field generation and activity through a magnetic dynamo. Main-sequence stars with masses below approximately 0.35 ${M}_{\odot }$ (mid-to-late M ...
• #### Zodiacal Exoplanets in Time (Zeit) Iii: A Short-Period Planet Orbiting a Pre-Main-Sequence Star in the Upper Scorpius Ob Association ﻿

(American Astronomical Society, 2016)
We confirm and characterize a close-in (Porb = 5.425 days), super-Neptune sized (5.04+0.34 −0.37 R⊕) planet transiting K2-33 (2MASS J16101473-1919095), a late-type (M3) pre-main sequence (11 Myr-old) star in the Upper ...