Zobrazeno 1 - 10
of 836
pro vyhledávání: '"Marcy, Geoffrey W"'
Autor:
Marcy, Geoffrey W.
This is a review and statistical analysis of the evidence supporting the existence of a cosmological constant in the early 1990s, before its discovery made with distant supernovae in 1998. The earlier evidence was derived from newly precise measureme
Externí odkaz:
http://arxiv.org/abs/2408.13427
We searched the Milky Way Plane along a 6-deg swath for pulses of monochromatic light as faint as 15th mag (V band) using a wide-field telescope equipped with a prism. Pulses with duration less than 1 second that occur more often than once every 10 m
Externí odkaz:
http://arxiv.org/abs/2405.13246
Autor:
Solano, Enrique, Marcy, Geoffrey W., Villarroel, Beatriz, Geier, Stefan, Streblyanska, Alina, Lombardi, Gianluca, Bär, Rudolf E., Andruk, Vitaly N.
We report on three optically bright, ~15th mag, point-sources within 10 arcsec of each other that vanished within 1 hour, based on two consecutive exposures at Palomar Observatory on 1952 July 19 (POSS I Red and Blue). The three point-sources have co
Externí odkaz:
http://arxiv.org/abs/2310.09035
Publikováno v:
Published in "EdgeScience Magazine 49" on 15 March 2022 by the Society for Scientific Exploration
Astronomers occasionally detect an object having unexpected shape, unexplainable photometry, or unprecedented spectra that are inconsistent with our contemporary knowledge of the universe. Upon careful assessment, many of these anomalies are discarde
Externí odkaz:
http://arxiv.org/abs/2310.14895
The Galactic Plane was searched for transient, monochromatic light at optical and near-IR wavelengths to detect pulses shorter than 1 sec. An objective-prism Schmidt telescope and CMOS camera were used to observe 973 square degrees along the Galactic
Externí odkaz:
http://arxiv.org/abs/2301.01230
Publikováno v:
2022 MNRAS 515, 3898-3910
A region 140 square degrees toward the Galactic Centre was searched for monochromatic optical light, both pulses shorter than 1 sec and continuous emission. A novel instrument was constructed that acquires optical spectra of every point within 6 squa
Externí odkaz:
http://arxiv.org/abs/2208.13561
A search was conducted for laser signals, both sub-second pulses and continuous emission, from the regions of the sky opposite Proxima and Alpha Centauri. These regions are located at the foci of the gravitational lensing caused by the Sun, ideal for
Externí odkaz:
http://arxiv.org/abs/2110.10247
Autor:
Villarroel, Beatriz, Marcy, Geoffrey W., Geier, Stefan, Streblyanska, Alina, Marquez, Enrique Solano, Andruk, Vitaly N., Shultz, Matthew E., Gupta, Alok C., Mattsson, Lars
Publikováno v:
Scientific Reports volume 11, Article number: 12794 (2021)
Nine point sources appeared within half an hour on a region within $\sim$ 10 arcmin of a red-sensitive photographic plate taken in April 1950 as part of the historic Palomar Sky Survey. All nine sources are absent on both previous and later photograp
Externí odkaz:
http://arxiv.org/abs/2106.11780
Autor:
Rosenthal, Lee J., Fulton, Benjamin J., Hirsch, Lea A., Isaacson, Howard T., Howard, Andrew W., Dedrick, Cayla M., Sherstyuk, Ilya A., Blunt, Sarah C., Petigura, Erik A., Knutson, Heather A., Behmard, Aida, Chontos, Ashley, Crepp, Justin R., Crossfield, Ian J. M., Dalba, Paul A., Fischer, Debra A., Henry, Gregory W., Kane, Stephen R., Kosiarek, Molly, Marcy, Geoffrey W., Rubenzahl, Ryan A., Weiss, Lauren M., Wright, Jason T.
We present a high-precision radial velocity (RV) survey of 719 FGKM stars, which host 164 known exoplanets and 14 newly discovered or revised exoplanets and substellar companions. This catalog updated the orbital parameters of known exoplanets and lo
Externí odkaz:
http://arxiv.org/abs/2105.11583
Autor:
Fulton, Benjamin J., Rosenthal, Lee J., Hirsch, Lea A., Isaacson, Howard, Howard, Andrew W., Dedrick, Cayla M., Sherstyuk, Ilya A., Blunt, Sarah C., Petigura, Erik A., Knutson, Heather A., Behmard, Aida, Chontos, Ashley, Crepp, Justin R., Crossfield, Ian J. M., Dalba, Paul A., Fischer, Debra A., Henry, Gregory W., Kane, Stephen R., Kosiarek, Molly, Marcy, Geoffrey W., Rubenzahl, Ryan A., Weiss, Lauren M., Wright, Jason T.
We used high-precision radial velocity measurements of FGKM stars to determine the occurrence of giant planets as a function of orbital separation spanning 0.03-30 au. Giant planets are more prevalent at orbital distances of 1-10 au compared to orbit
Externí odkaz:
http://arxiv.org/abs/2105.11584