Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Peek, Kathryn M. G."'
We present a multi-wavelength study of the local Leo cold cloud (LLCC), a very nearby, very cold cloud in the interstellar medium. Through stellar absorption studies we find that the LLCC is between 11.3 pc and 24.3 pc away, making it the closest kno
Externí odkaz:
http://arxiv.org/abs/1104.5232
Autor:
Howard, Andrew W., Johnson, John Asher, Marcy, Geoffrey W., Fischer, Debra A., Wright, Jason T., Bernat, David, Henry, Gregory W., Peek, Kathryn M. G., Isaacson, Howard, Apps, Kevin, Endl, Michael, Cochran, William D., Valenti, Jeff A., Anderson, Jay, Piskunov, Nikolai E.
We present precise Doppler measurements of four stars obtained during the past decade at Keck Observatory by the California Planet Survey (CPS). These stars, namely, HD 34445, HD 126614, HD 13931, and Gl 179, all show evidence for a single planet in
Externí odkaz:
http://arxiv.org/abs/1003.3488
Autor:
Bowler, Brendan P., Johnson, John Asher, Marcy, Geoffrey W., Henry, Gregory W., Peek, Kathryn M. G., Fischer, Debra A., Clubb, Kelsey I., Liu, Michael C., Reffert, Sabine, Schwab, Christian, Lowe, Thomas B.
Publikováno v:
Astrophys.J.709:396-410,2010
We present an analysis of ~5 years of Lick Observatory radial velocity measurements targeting a uniform sample of 31 intermediate-mass subgiants (1.5 < M*/Msun < 2.0) with the goal of measuring the occurrence rate of Jovian planets around (evolved) A
Externí odkaz:
http://arxiv.org/abs/0912.0518
Autor:
Sato, Bunei, Fischer, Debra A., Ida, Shigeru, Harakawa, Hiroki, Omiya, Masashi, Johnson, John A., Marcy, Geoffrey W., Toyota, Eri, Hori, Yasunori, Isaacson, Howard, Howard, Andrew W., Peek, Kathryn M. G.
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 variation with a period of 466.47+-0.35 d, a semiamplitu
Externí odkaz:
http://arxiv.org/abs/0907.5080
Autor:
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., Blondin, Stephane, Li, Weidong, Filippenko, Alexei V., Wheeler, J. Craig, Kirshner, Robert P., Patat, Ferdinando, Nugent, Peter, Foley, Ryan J., Vogt, Steven S., Butler, R. Paul, Peek, Kathryn M. G., Rosolowsky, Erik, Herczeg, Gregory J., Sauer, Daniel N., Mazzali, Paolo A.
Publikováno v:
Astrophys.J.702:1157-1170,2009
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 presence of circumstellar gas in the progenitor sys
Externí odkaz:
http://arxiv.org/abs/0907.1083
Autor:
Peek, Kathryn M. G.
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 observational spectra using a chi-square-minimizatio
Externí odkaz:
http://arxiv.org/abs/0905.4731
Autor:
Peek, Kathryn M. G., Johnson, John Asher, Fischer, Debra A., Marcy, Geoffrey W., Henry, Gregory W., Howard, Andrew W., Wright, Jason T., Lowe, Thomas B., Reffert, Sabine, Schwab, Christian, Williams, Peter K. G., Isaacson, Howard, Giguere, Matthew J.
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 presence of Jupiter-mass exoplanets in highly eccentric or
Externí odkaz:
http://arxiv.org/abs/0904.2786
Autor:
Fischer, Debra A., Marcy, Geoffrey W., Butler, R. Paul, Vogt, Steven S., Laughlin, Greg, Henry, Gregory W., Abouav, David, Peek, Kathryn M. G., Wright, Jason T., Johnson, John A., McCarthy, Chris, Isaacson, Howard
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. A fifth planet is presented, with an apparent orbi
Externí odkaz:
http://arxiv.org/abs/0712.3917
Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
Autor:
Johnson, John A., Marcy, Geoffrey W., Fischer, Debra A., Wright, Jason T., Reffert, Sabine, Kregenow, Julia M., Williams, Peter K. G., Peek, Kathryn M. G.
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. Periodic variations in the radial velocities of both
Externí odkaz:
http://arxiv.org/abs/0711.4367
Autor:
Johnson, John A., Butler, R. Paul, Marcy, Geoffrey W., Fischer, Debra A., Vogt, Steven S., Wright, Jason T., Peek, Kathryn M. G.
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 with a Doppler-detected Jovian planet. The residuals t
Externí odkaz:
http://arxiv.org/abs/0707.2409