Results 1 to 10 of about 2,549,521 (376)

An Extreme-precision Radial-velocity Pipeline: First Radial Velocities from EXPRES [PDF]

The Astronomical Journal, 2020
Abstract The EXtreme-PREcision Spectrograph (EXPRES) is an environmentally stabilized, fiber-fed, R = 137,500, optical spectrograph. It was recently commissioned at the 4.3 m Lowell Discovery Telescope near Flagstaff, Arizona. The spectrograph was designed with a target radial-velocity (RV) precision of 30 cm s−1.
Ryan R. Petersburg, J. M. 冕 Joel Ong 王加, Lily L. Zhao, Ryan T. Blackman, John M. Brewer, Lars A. Buchhave, Samuel H. C. Cabot, Allen B. Davis, Colby A. Jurgenson, Christopher Leet, Tyler M. McCracken, David Sawyer, Mikhail Sharov, René Tronsgaard, Andrew E. Szymkowiak, Debra A. Fischer   +15 more
semanticscholar   +6 more sources

Photometry as a proxy for stellar activity in radial velocity analyses [PDF]

Astronomical Journal, 2020
Stellar activity remains a limiting factor in measuring precise planet parameters from radial velocity spectroscopy, not least in the search for Earth mass planets orbiting in the habitable zones of Sun-like stars.
Crossfield, Ian J. M., Kosiarek, Molly R.   +1 more
core   +2 more sources

Estimating the Parameters of Wind Turbulence from Spectra of Radial Velocity Measured by a Pulsed Doppler Lidar

Remote Sensing, 2021
The strategy providing an estimation of both the mean velocity and the temporal and spatial spectra of radial velocity from data of the same pulse coherent Doppler lidar is proposed.
Viktor A. Banakh, Igor N. Smalikho, Andrey V. Falits, Artem M. Sherstobitov   +3 more
doaj   +2 more sources

RadVel: The Radial Velocity Modeling Toolkit [PDF]

, 2018
RadVel is an open source Python package for modeling Keplerian orbits in radial velocity (RV) time series. RadVel provides a convenient framework to fit RVs using maximum a posteriori optimization and to compute robust confidence intervals by sampling ...
Blunt, Sarah, Fulton, Benjamin J., Petigura, Erik A., Sinukoff, Evan   +3 more
core   +4 more sources

Long-lived, long-period radial velocity variations in Aldebaran: A planetary companion and stellar activity [PDF]

, 2015
We investigate the nature of the long-period radial velocity variations in Alpha Tau first reported over 20 years ago. We analyzed precise stellar radial velocity measurements for Alpha Tau spanning over 30 years.
Cochran, W. D., Doellinger, M., Endl, M., Girardi, L., Guenther, E. W., Han, I., Hartmann, M., Hatzes, A. P., Kim, K. -M., Larson, A. M., Lee, B. -C., MacQueen, P., Mkrtichian, D. E., Simon, A. E., Walker, G. A. H., Yang, S., Zechmeister, M.   +16 more
core   +2 more sources

The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades [PDF]

Astrophysical Journal Supplement Series, 2021
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.
L. Rosenthal, B. Fulton, L. Hirsch, H. Isaacson, A. Howard, C. M. Dedrick, Ilya A. Sherstyuk, S. Blunt, E. Petigura, H. Knutson, A. Behmard, A. Chontos, J. Crepp, I. Crossfield, P. Dalba, D. Fischer, G. Henry, S. Kane, M. Kosiarek, G. Marcy, R. Rubenzahl, L. Weiss, J. Wright   +22 more
semanticscholar   +1 more source

orvara: An Efficient Code to Fit Orbits Using Radial Velocity, Absolute, and/or Relative Astrometry [PDF]

Astronomical Journal, 2021
We present an open-source Python package, Orbits from Radial Velocity, Absolute, and/or Relative Astrometry (orvara), to fit Keplerian orbits to any combination of radial velocity, relative astrometry, and absolute astrometry data from the Hipparcos-Gaia
Timothy D. Brandt, T. Dupuy, Yiting Li, G. Brandt, Yunlin Zeng, D. Michalik, D. B. Gagliuffi, V. Raposo-Pulido   +7 more
semanticscholar   +1 more source

The Solar Neighborhood XLVIII: Nine Giant Planets Orbiting Nearby K Dwarfs, and the CHIRON Spectrograph’s Radial Velocity Performance [PDF]

Astronomical Journal, 2021
We report initial results of a large radial velocity survey of K dwarfs up to a distance of 50 pc from the solar system, to look for stellar, brown dwarf, and Jovian planets using radial velocities from the CHIRON spectrograph on the CTIO/SMARTS 1.5 m ...
L. Paredes, T. Henry, S. Quinn, D. Gies, R. Hinojosa-Goñi, H. James, W. Jao, R. White   +7 more
semanticscholar   +1 more source

Public HARPS radial velocity database corrected for systematic errors [PDF]

Astronomy & Astrophysics, 2020
Context. The High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph has been mounted since 2003 at the ESO 3.6 m telescope in La Silla and provides state-of-the-art stellar radial velocity (RV) measurements with a precision down to ∼1 m s−1 ...
T. Trifonov, L. Tal-Or, Mathias Zechmeister, A. Kaminski, S. Zucker, T. Mazeh   +5 more
semanticscholar   +1 more source

The Sixth Data Release of the Radial Velocity Experiment (RAVE). I. Survey Description, Spectra, and Radial Velocities [PDF]

Astronomical Journal, 2020
The Radial Velocity Experiment (Rave) is a magnitude-limited (9 < I < 12) spectroscopic survey of Galactic stars randomly selected in Earth’s southern hemisphere.
M. Steinmetz, G. Matijevič, H. Enke, T. Zwitter, G. Guiglion, P. McMillan, G. Kordopatis, M. Valentini, C. Chiappini, L. Casagrande, J. Wojno, B. Anguiano, O. Bienaymé, A. Bijaoui, J. Binney, D. Burton, P. Cass, P. Laverny, K. Fiegert, K. Freeman, J. Fulbright, B. Gibson, G. Gilmore, E. Grebel, A. Helmi, A. Kunder, U. Munari, J. Navarro, Q. Parker, G. Ruchti, A. Recio-Blanco, W. Reid, G. Seabroke, A. Siviero, A. Siebert, M. Stupar, F. Watson, Mary E. K. Williams, R. Wyse, F. Anders, T. Antoja, D. Birko, J. Bland-Hawthorn, D. Bossini, R. García, I. Carrillo, W. Chaplin, Y. Elsworth, B. Famaey, O. Gerhard, P. Jofré, A. Just, S. Mathur, A. Miglio, I. Minchev, G. Monari, B. Mosser, A. Ritter, T. Rodrigues, R. Scholz, Sanjib Sharma, K. Sysoliatina   +61 more
semanticscholar   +1 more source