Variable Sodium Absorption in a Low-extinction Type Ia Supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but it may suggest the...
A Substellar Companion in a 1.3 yr Nearly-circular Orbit of HD 16760 (2009)
Sato, Bunei, Fischer, Debra A., Ida, Shigeru, Harakawa, Hiroki, Omiya, Masashi, Johnson, John A., ...
We report the detection of a substellar companion orbiting the G5 dwarf HD 16760 from the N2K sample. Precise Doppler measurements of the star from Subaru and Keck revealed a Keplerian velocity...
Variable Sodium Absorption in a Low-Extinction Type Ia Supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but it may suggest the...
A New Technique for Determining Europium Abundances in Solar-Metallicity Stars (2009)
We present a new technique for measuring the abundance of europium, a representative r-process element, in solar-metallicity stars. Our algorithm compares LTE synthetic spectra with high-resolution...
Old, Rich, and Eccentric: Two Jovian Planets Orbiting Evolved Metal-Rich Stars (2009)
Peek, Kathryn M. G., Johnson, John Asher, Fischer, Debra A., Marcy, Geoffrey W., Henry, Gregory W., Howard, Andrew W., ...
We present radial velocity measurements of two stars observed as part of the Lick Subgiants Planet Search and the Keck N2K survey. Variations in the radial velocities of both stars reveal the...
Variable sodium absorption in a low-extinction type Ia supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Five Planets Orbiting 55 Cancri (2007)
Fischer, Debra A., Marcy, Geoffrey W., Butler, R. Paul, Vogt, Steven S., Laughlin, Greg, Henry, Gregory W., ...
We report 18 years of Doppler shift measurements of a nearby star, 55 Cancri, that exhibit strong evidence for five orbiting planets. The four previously reported planets are strongly confirmed here....
Johnson, John A., Marcy, Geoffrey W., Fischer, Debra A., Wright, Jason T., Reffert, Sabine, Kregenow, Julia M., ...
We report precise Doppler measurements of two evolved stars, kappa CrB (HD142091) and HD 167042, obtained at Lick Observatory as part of our search for planets orbiting intermediate-mass subgiants....
A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass (2007)
Johnson, John A., Butler, R. Paul, Marcy, Geoffrey W., Fischer, Debra A., Vogt, Steven S., Wright, Jason T., ...
We report precise Doppler measurements of GJ317 (M3.5V) that reveal the presence of a planet with a minimum mass Msini = 1.2 Mjup in an eccentric, 692.9 day orbit. GJ317 is only the third M dwarf...
Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b (2007)
Winn, Joshua N., Johnson, John Asher, Peek, Kathryn M. G., Marcy, Geoffrey W., Bakos, Gaspar A., Enya, Keigo, ...
The short-period exoplanet HD 147506b (also known as HAT-P-2b) has an eccentric orbit, raising the possibility that it migrated through planet-planet scattering or Kozai oscillations accompanied by...