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- Space Telescope Science InstituteUS10 papers
- Center for Astrophysics Harvard & SmithsonianUS8 papers
- Pontificia Universidad Católica de ChileCL8 papers
- University of California, Santa CruzUS8 papers
- Louisiana State UniversityUS7 papers
- European Southern ObservatoryCL6 papers
- Herzberg Institute of AstrophysicsCA6 papers
- Johns Hopkins UniversityUS6 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP6 papers
- University of ArizonaUS6 papers
- Massachusetts Institute of TechnologyUS5 papers
- Peking UniversityCN5 papers
11 papers · 1 filter
An Extremely Bright Echo Associated With SN 2002hh
D. L. Welch, Geoffrey C. Clayton, Amy Campbell +4
We present new, very late-time optical photometry and spectroscopy of the interesting Type II-P supernova, SN 2002hh, in NGC 6946. Gemini/GMOS-N has been used to acquire visible sp…
V605 Aql: The Older Twin of Sakurai's Object
Geoffrey C. Clayton, F. Kerber, N. Pirzkal +3
New optical spectra have been obtained with VLT/FORS2 of the final helium shell flash (FF) star, V605 Aql, which peaked in brightness in 1919. New models suggest that this star is…
Discovery of Five New R Coronae Borealis Stars in the MACHO Galactic Bulge Database
A. Zaniewski, Geoffrey C. Clayton, D. L. Welch +3
We have identified five new R Coronae Borealis (RCB) stars in the Galactic bulge using the MACHO Project photometry database, raising the total number of known Galactic RCB stars t…
A Unique Dust Formation Episode in the SC-Type Star UY Cen
Justin D. R. Steinfadt, Geoffrey C. Clayton, Tom Lloyd Evans +1
We report the first detection of new dust formation in an SC star. The prototype of the SC stars, UY Cen, underwent a decline of 2 magnitudes in the V-band. The SC stars show pulsa…
Detection of Near-IR CO Absorption Bands in R Coronae Borealis Stars
Emily D. Tenenbaum, Geoffrey C. Clayton, Martin Asplund +8
R Coronae Borealis (RCB) stars are hydrogen-deficient, carbon-rich pulsating post-AGB stars that experience massive irregular declines in brightness caused by circumstellar dust fo…
An Extremely Large Excess of 18O in the Hydrogen-Deficient Carbon Star, HD 137613
Geoffrey C. Clayton, Falk Herwig, T. R. Geballe +4
We report the discovery of a uniquely large excess of 18O in the hydrogen-deficient carbon (HdC) star, HD 137613, based on a spectrum of the first overtone bands of CO at 2.3-2.4 m…