188 citations · 1.2k across the 16 of their papers we have counts for
16 papers
HS-ANET: Star Spectral Type Enhanced Astrometric Calibration for Hyper Spectral Space Imaging
Kevin Phan, William Mitchell, David Chaparro +2
Traditional lost-in-space algorithms, such as those implemented in astrometry.net, solve for spacecraft orientation by matching observed star fields to celestial catalogs using geo…
SpectraNet: Learned Recognition of Artificial Satellites From High Contrast Spectroscopic Imagery
J. Zachary Gazak, Ian McQuaid, Ryan Swindle +2
Effective space traffic management requires positive identification of artificial satellites. Current methods for extracting object identification from observed data require spatia…
Red Supergiants as cosmic abundance probes: the first direct metallicity determination of NGC 4038 in the Antennae
C. Lardo, B. Davies, R-P. Kudritzki +5
We present a direct determination of the stellar metallicity in the close pair galaxy NGC~4038 (D = 20 Mpc) based on the quantitative analysis of moderate resolution KMOS/VLT spect…
Red Supergiant Stars as Cosmic Abundance Probes: KMOS Observations in NGC 6822
L. R. Patrick, C. J. Evans, B. Davies +5
We present near-IR spectroscopy of red supergiant (RSG) stars in NGC 6822, obtained with the new VLT-KMOS instrument. From comparisons with model spectra in the J-band we determine…
Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars
Philip S. Muirhead, Andrew W. Mann, Andrew Vanderburg +7
We confirm and characterize the exoplanetary systems Kepler-445 and Kepler-446: two mid-M dwarf stars, each with multiple, small, short-period transiting planets. Kepler-445 is a m…
Planet Hunters VII. Discovery of a New Low-Mass, Low-Density Planet (PH3 c) Orbiting Kepler-289 with Mass Measurements of Two Additional Planets (PH3 b and d)
Joseph R. Schmitt, Eric Agol, Katherine M. Deck +18
We report the discovery of one newly confirmed planet ( days, ) and mass determinations of two previously validated Kepler planets, Kepler-…
Quantitative Spectroscopic J-band Study of Red Supergiants in Perseus OB-1
J. Zachary Gazak, Ben Davies, Rolf Kudritzki +2
We demonstrate how the metallicities of red supergiant (RSG) stars can be measured from quantitative spectroscopy down to resolutions of ~3000 in the J-band. We have obtained high…
A New Method for Measuring Metallicities of Young Super Star Clusters
J. Zachary Gazak, Ben Davies, Nate Bastian +7
We demonstrate how the metallicities of young super star clusters can be measured using novel spectroscopic techniques in the J-band. The near-infrared flux of super star clusters…
Age Dating Stellar Populations in the Near Infrared: An absolute age indicator from the presence/absence of red supergiants
J. Zachary Gazak, N. Bastian, R. P. Kudritzki +4
The determination of age is a critical component in the study of a population of stellar clusters. In this letter we present a new absolute age indicator for young massive star clu…
Characterizing the Cool KOIs II. The M Dwarf KOI-254 and its Hot Jupiter
John Asher Johnson, J. Zachary Gazak, Kevin Apps +12
We report the confirmation and characterization of a transiting gas giant planet orbiting the M dwarf KOI-254 every 2.455239 days, which was originally discovered by the Kepler mis…
TERMS Photometry of Known Transiting Exoplanets
Diana Dragomir, Stephen R. Kane, Genady Pilyavsky +10
The Transit Ephemeris Refinement and Monitoring Survey (TERMS) conducts radial velocity and photometric monitoring of known exoplanets in order to refine planetary orbits and predi…
Long-Term Transit Timing Monitoring and Refined Light Curve Parameters of HAT-P-13b
Benjamin J. Fulton, Avi Shporer, Joshua N. Winn +3
We present 10 new transit light curves of the transiting hot Jupiter HAT-P-13b, obtained during two observational seasons by three different telescopes. When combined with 12 previ…
Transit Analysis Package (TAP and autoKep): IDL Graphical User Interfaces for Extrasolar Planet Transit Photometry
J. Zachary Gazak, John A. Johnson, John Tonry +3
We present an IDL graphical user interface-driven software package designed for the analysis of extrasolar planet transit light curves. The Transit Analysis Package (TAP) software…
LHS6343C: A Transiting Field Brown Dwarf Discovered by the Kepler Mission
John Asher Johnson, Kevin Apps, J. Zachary Gazak +7
We report the discovery of a brown dwarf that transits one member of the M+M binary system LHS6343AB every 12.71 days. The transits were discovered using photometric data from the…
NLTT 41135: a field M-dwarf + brown dwarf eclipsing binary in a triple system, discovered by the MEarth observatory
Jonathan Irwin, Lars Buchhave, Zachory K. Berta +13
We report the discovery of an eclipsing companion to NLTT 41135, a nearby M5 dwarf that was already known to have a wider, slightly more massive common proper motion companion, NLT…
A Third Exoplanetary System with Misaligned Orbital and Stellar Spin Axes
John A. Johnson, Joshua N. Winn, Simon Albrecht +3
We present evidence that the WASP-14 exoplanetary system has misaligned orbital and stellar-rotational axes, with an angle lambda = 33.1 +/- 7.4 deg between their sky projections.…