Caffau, Elisabetta, Ludwig, Hans-G., Steffen, Matthias, Ayres, Thomas R., Bonifacio, Piercarlo, Cayrel, Roger, ...
The solar oxygen abundance has undergone a major downward revision in the last decade, the most noticeable one being the update including 3D hydrodynamical simulations to model the solar photosphere....
Thomas R. Ayres, Alexander Brown, A. Osten, David P. Huenemoerder, Jeremy J. Drake, ...
In mid-September of 1999, a multiwavelength campaign was carried out on the coronally active RS Canum Venaticorum binary HR 1099 (K1 IV] G5 V; P \ 2.84 days), during commissioning of the High Energy...
Solar Carbon Monoxide, Thermal Profiling, and the Abundances of C, O, and their Isotopes (2006)
Ayres, Thomas R., Plymate, Claude, Keller, Christoph U.
A solar photospheric "thermal profiling" analysis is presented, exploiting the infrared rovibrational bands of carbon monoxide (CO) as observed with the McMath-Pierce Fourier transform spectrometer...
A Far Ultraviolet Spectroscopic Explorer Survey of Coronal Forbidden Lines in Late-Type Stars (2002)
Redfield, Seth, Ayres, Thomas R., Linsky, Jeffrey L., Ake, Thomas B., Dupree, A. K., Robinson, Richard D., ...
We present a survey of coronal forbidden lines detected in Far Ultraviolet Spectroscopic Explorer (FUSE) spectra of nearby stars. Two strong coronal features, Fe XVIII 974 A and Fe XIX 1118 A, are...
A FAR ULTRAVIOLET SPECTROSCOPIC EXPLORER SURVEY OF CORONAL FORBIDDEN LINES IN LATE-TYPE STARS (2002)
Seth Redfield, Thomas R. Ayres, Jeffrey L. Linsky, Thomas B. Ake, A. K. Dupree
We present a survey of coronal forbidden lines detected in Far Ultraviolet Spectroscopic Explorer (FUSE) spectra of nearby stars. Two strong coronal features, Fe xviii 974 and Fe xix 1118, are...
Theodore Simon, Thomas R. Ayres, Seth Redfield, Jeffrey L. Linsky
In deeply convective stars, the nonthermal energy required to heat the chromosphere ultimately is supplied by turbulent magnetoconvection. Because the early and middle A stars have very shallow...
Thomas R. Ayres, Er Brown, Graham M. Harper, Rachel A. Osten, Jeffrey L. Linsky, Brian E. Wood, ...
We describe an extensive search with the Space Telescope Imaging Spectrograph (STIS) for ultraviolet coronal (T> 10 6 K) forbidden lines in a sample of 29 F–M dwarfs, giants, and supergiants....
Thomas R. Ayres, Er Brown, Graham M. Harper
We have used the High Resolution Camera (HRC-I) of the Chandra X-Ray Observatory to search for coronal (T 106 K) emission from the archetype ‘ ‘ noncoronal ’ ’ red giants Arcturus ( Bootis=HD...
Brian E. Wood, L. Linsky, Thomas R. Ayres
Our analysis of high-resolution Goddard High-Resolution Spectrograph (GHRS) spectra of late-type stars shows that the Si IV and C IV lines formed near 105 K can be decomposed into the sum of two...