491 citations · 8.8k across the 240 of their papers we have counts for
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The Ultraviolet Radiation Environment Around M dwarf Exoplanet Host Stars
Kevin France, Cynthia S. Froning, Jeffrey L. Linsky +8
The spectral and temporal behavior of exoplanet host stars is a critical input to models of the chemistry and evolution of planetary atmospheres. At present, little observational o…
Unique Astrophysics in the Lyman Ultraviolet
Jason Tumlinson, Alessandra Aloisi, Gerard Kriss +24
There is unique and groundbreaking science to be done with a new generation of UV spectrographs that cover wavelengths in the "Lyman Ultraviolet" (LUV; 912 - 1216 Ang). There is no…
A Fast Flare and Direct Redshift Constraint in Far-UV Spectra of the Blazar S50716+714
Charles W. Danforth, Krzysztof Nalewajko, Kevin France +1
The BL Lacertae object S50716+714 is one of the most studied blazars on the sky due to its active variability and brightness in many bands, including VHE gamma rays. We present her…
Lyman alpha dominance of the Classical T Tauri FUV Radiation Field
Rebecca Schindhelm, Kevin France, Gregory Herczeg +6
Far-ultraviolet (FUV) radiation plays an important role in determining chemical abundances in protoplanetary disks. HI Lyman alpha is suspected to be the dominant component of the…
From Protoplanetary Disks to Extrasolar Planets: Understanding the Life Cycle of Circumstellar Gas with Ultraviolet Spectroscopy
Kevin France, Matthew Beasley, David R. Ardila +20
Few scientific discoveries have captured the public imagination like the explosion of exoplanetary science during the past two decades. This work has fundamentally changed our pict…
A Hubble Space Telescope Survey of H2 Emission in the Circumstellar Environments of Young Stars
Kevin France, Rebecca Schindhelm, Gregory J. Herczeg +8
The formation timescale and final architecture of exoplanetary systems are closely related to the properties of the molecular disks from which they form. Observations of the spatia…
On the Significance of Absorption Features in HST/COS Data
Brian A. Keeney, Charles W. Danforth, John T. Stocke +2
We present empirical scaling relations for the significance of absorption features detected in medium resolution, far-UV spectra obtained with the Cosmic Origins Spectrograph (COS)…
Ultraviolet Spectroscopy of Rapidly-Rotating Solar-Mass Stars: Emission Line Redshifts as a Test of the Solar-Stellar Connection
Jeffrey L. Linsky, Rachel Bushinsky, Tom Ayres +1
We compare high-resolution ultraviolet spectra of the Sun and thirteen solarmass main sequence stars with different rotational periods that serve as proxies for their different age…
Time-resolved Ultraviolet Spectroscopy of the M-dwarf GJ 876 Exoplanetary System
Kevin France, Jeffrey L. Linsky, Feng Tian +2
Extrasolar planets orbiting M-stars may represent our best chance to discover habitable worlds in the coming decade. The ultraviolet spectrum incident upon both Earth-like and Jovi…
Characterizing CO Fourth Positive Emission in Young Circumstellar Disks
Rebecca Schindhelm, Kevin France, Eric Burgh +5
Carbon Monoxide is a commonly used IR/sub-mm tracer of gas in protoplanetary disks. We present an analysis of ultraviolet CO emission in {HST}-COS spectra for 12 Classical T Tauri…