Zobrazeno 1 - 10
of 2 603
pro vyhledávání: '"Terrien A"'
Autor:
Cole, Ryan K., Fredrick, Connor, Parts, Winter, Kingston, Max, Chinatti, Carolyn, Tusler, Josiah, Mahadevan, Suvrath, Terrien, Ryan, Diddams, Scott A.
Disk-integrated observations of the Sun provide a unique vantage point to explore stellar activity and its effect on measured radial velocities. Here, we report a new approach for disk-integrated solar spectroscopy and evaluate its capabilities for s
Externí odkaz:
http://arxiv.org/abs/2410.04588
Autor:
Wanderley, Fábio, Cunha, Katia, Smith, Verne, Kochukhov, Oleg, Souto, Diogo, Prieto, Carlos Allende, Mahadevan, Suvrath, Majewski, Steven, Muirhead, Philip, Pinsonneault, Marc, Terrien, Ryan
Stellar magnetic fields have a major impact on space weather around exoplanets orbiting low-mass stars. From an analysis of Zeeman-broadened Fe I lines measured in near-infrared SDSS/APOGEE spectra, mean magnetic fields are determined for a sample of
Externí odkaz:
http://arxiv.org/abs/2409.06637
Autor:
Gilbertson, Christian, Ford, Eric B., Halverson, Samuel, Fitzmaurice, Evan, Blake, Cullen H., Stefánsson, Guðmundur, Mahadevan, Suvrath, Wright, Jason T., Luhn, Jacob K., Ninan, Joe P., Robertson, Paul, Roy, Arpita, Schwab, Christian, Terrien, Ryan C.
A significant barrier to achieving the radial velocity (RV) measurement accuracy and precision required to characterize terrestrial mass exoplanets is the existence of time-variable features in the measured spectra, from both telluric absorption and
Externí odkaz:
http://arxiv.org/abs/2408.17289
Autor:
Ford, Eric B., Bender, Chad F., Blake, Cullen H., Gupta, Arvind F., Kanodia, Shubham, Lin, Andrea S. J., Logsdon, Sarah E., Luhn, Jacob K., Mahadevan, Suvrath, Palumbo III, Michael L., Terrien, Ryan C., Wright, Jason T., Zhao, Jinglin, Halverson, Samuel, Hunting, Emily, Robertson, Paul, Roy, Arpita, Stefansson, Gudmundur
We present the results of Sun-as-a-star observations by the NEID Solar Telescope at WIYN Observatory, spanning January 1, 2021 through June 30, 2024. We identify 117,060 observations which are unlikely to be significantly affected by weather, hardwar
Externí odkaz:
http://arxiv.org/abs/2408.13318
Autor:
Siegel, Jared C., Halverson, Samuel, Luhn, Jacob K., Zhao, Lily L., Moulla, Khaled Al, Robertson, Paul, Bender, Chad F., Terrien, Ryan C., Roy, Arpita, Mahadevan, Suvrath, Hearty, Fred, Ninan, Joe P., Wright, Jason T., Ford, Eric B., Schwab, Christian, Stefánsson, Guðmundur, Blake, Cullen H., McElwain, Michael W.
For solar-type stars, spots and their associated magnetic regions induce radial velocity perturbations through the Doppler rotation signal and the suppression of convective blueshift -- collectively known as rotation-modulation. We developed the Rota
Externí odkaz:
http://arxiv.org/abs/2408.07121
Autor:
Beard, Corey, Robertson, Paul, Giovinazzi, Mark R., Murphy, Joseph M. Akana, Ford, Eric B., Halverson, Samuel, Han, Te, Holcomb, Rae, Lubin, Jack, Luque, Rafael, Premnath, Pranav, Bender, Chad F., Blake, Cullen H., Gong, Qian, Isaacson, Howard, Kanodia, Shubham, Li, Dan, Lin, Andrea S. J., Logsdon, 5 Sarah E., Lubar, Emily, McElwain, Michael W., Monson, Andrew, Ninan, Joe P., Rajagopal, Jayadev, Roy, Arpita, Schwab, Christian, Stefansson, Gudmundur, Terrien, Ryan C., Wright, Jason T.
We present a new analysis of Kepler-21, the brightest (V = 8.5) Kepler system with a known transiting exoplanet, Kepler-21 b. Kepler-21 b is a radius valley planet ($R = 1.6\pm 0.2 R_{\oplus}$) with an Earth-like composition (8.38$\pm$1.62 g/cc), tho
Externí odkaz:
http://arxiv.org/abs/2408.02873
Autor:
Sekhar, Pooja, Kreider, Molly Kate, Fredrick, Connor, Ninan, Joe P, Bender, Chad F, Terrien, Ryan, Mahadevan, Suvrath, Diddams, Scott A
The search for earth-like exoplanets with the Doppler radial velocity technique is an extremely challenging and multifaceted precision spectroscopy problem. Currently, one of the limiting instrumental factors in reaching the required long-term $10^{-
Externí odkaz:
http://arxiv.org/abs/2408.02627
Autor:
Burrows, Abigail, Halverson, Samuel, Siegel, Jared C., Gilbertson, Christian, Luhn, Jacob, Burt, Jennifer, Bender, Chad F., Roy, Arpita, Terrien, Ryan C., Vangstein, Selma, Mahadevan, Suvrath, Wright, Jason T., Robertson, Paul, Ford, Eric B., Stefánsson, Guðmundur, Ninan, Joe P., Blake, Cullen H., McElwain, Michael W., Schwab, Christian, Zhao, Jinglin
Publikováno v:
AJ 167 243 (2024)
We revisit the long-studied radial velocity (RV) target HD26965 using recent observations from the NASA-NSF 'NEID' precision Doppler facility. Leveraging a suite of classical activity indicators, combined with line-by-line RV analyses, we demonstrate
Externí odkaz:
http://arxiv.org/abs/2404.17494
Autor:
Tran, Quang H., Bowler, Brendan P., Cochran, William D., Halverson, Samuel, Mahadevan, Suvrath, Ninan, Joe P., Robertson, Paul, Stefánsson, Guðmundur, Terrien, Ryan C.
We report the discovery of a hot Jupiter candidate orbiting HS Psc, a K7 ($\approx$0.7 $M_\odot$) member of the $\approx$130 Myr AB Doradus moving group. Using radial velocities over 4 years from the Habitable-zone Planet Finder spectrograph at the H
Externí odkaz:
http://arxiv.org/abs/2403.02378
Autor:
Jiang, Sarah, Roy, Arpita, Halverson, Samuel, Bender, Chad F., Selgas, Carlos, Otor, O. Justin, Mahadevan, Suvrath, Stefánsson, Guðmundur, Terrien, Ryan C., Schwab, Christian
Publikováno v:
The Astronomical Journal (2023), 167, 9
Recent improvements in the sensitivity and precision of the radial velocity (RV) method for exoplanets have brought it close, but not quite to, the threshold ($\sim$10 cm/s) required to detect Earth-mass and other potentially habitable planets around
Externí odkaz:
http://arxiv.org/abs/2311.10677