233 citations · 1.1k across the 9 of their papers we have counts for
14 papers
Direct Imaging and Spectroscopy of a Planetary Mass Candidate Companion to a Young Solar Analog
David Lafrenière, Ray Jayawardhana, Marten H. van Kerkwijk
We present Gemini near-infrared adaptive optics imaging and spectroscopy of a planetary mass candidate companion to 1RXS J160929.1-210524, a roughly solar-mass member of the 5 Myr-…
Lithium Depletion of Nearby Young Stellar Associations
Erin Mentuch, Alexis Brandeker, Marten H. van Kerkwijk +2
We estimate cluster ages from lithium depletion in five pre-main-sequence groups found within 100 pc of the Sun: TW Hydrae Association, Eta Chamaeleontis Cluster, Beta Pictoris Mov…
A Multiplicity Census of Young Stars in Chamaeleon I
David Lafreniere, Ray Jayawardhana, Alexis Brandeker +2
We present the results of a multiplicity survey of 126 stars spanning ~0.1-3 solar masses in the ~2-Myr-old Chamaeleon I star-forming region, based on adaptive optics imaging with…
The variable radio-to-X-ray spectrum of the magnetar XTE J1810-197
F. Camilo, S. M. Ransom, J. Penalver +9
We have observed the 5.54s anomalous X-ray pulsar XTE J1810-197 at radio, millimeter, and infrared (IR) wavelengths, with the aim of learning about its broad-band spectrum. At the…
Extinction Columns and Intrinsic X-ray Spectra of the Anomalous X-ray Pulsars
Martin Durant, Marten H. van Kerkwijk
The X-ray spectra of Anomalous X-ray Pulsars have long been fit by smooth, empirical models such as the sum of a black-body plus a power law. These reproduce the ~0.5 to 10 keV ran…
Distances to Anomalous X-ray Pulsars using Red Clump Stars
Martin Durant, Marten H. van Kerkwijk
We identify `red clump stars' - core helium-burning giants - among 2MASS stars and use them to measure the run of reddening with distance in the direction of each of the Galactic A…