Zobrazeno 1 - 10
of 766
pro vyhledávání: '"Fischer, Debra A."'
Autor:
Llama, Joe, Zhao, Lily L., Brewer, John M., Szymkowiak, Andrew, Fischer, Debra A., Collins, Michael, Tiegs, Jake, Cornelius, Frank
The signal induced by a temperate, terrestrial planet orbiting a Sun-like star is an order of magnitude smaller than the host stars' intrinsic variability. Understanding stellar activity is, therefore, a fundamental obstacle in confirming the smalles
Externí odkaz:
http://arxiv.org/abs/2407.07967
Autor:
Zhao, Lily L., Dumusque, Xavier, Ford, Eric B., Llama, Joe, Mortier, Annelies, Bedell, Megan, Moulla, Khaled Al, Bender, Chad F., Blake, Cullen H., Brewer, John M., Cameron, Andrew Collier, Cosentino, Rosario, Figueira, Pedro, Fischer, Debra A., Ghedina, Adriano, Gonzalez, Manuel, Halverson, Samuel, Kanodia, Shubham, Latham, David W., Lin, Andrea S. J., Curto, Gaspare Lo, Lodi, Marcello, Logsdon, Sarah E., Lovis, Christophe, Mahadevan, Suvrath, Monson, Andrew, Ninan, Joe P., Pepe, Francesco, Roettenbacher, Rachael M., Roy, Arpita, Santos, Nuno C., Schwab, Christian, Stefánsson, Guðmundur, Szymkowiak, Andrew E., Terrien, Ryan C., Udry, Stephane, Weiss, Sam A., Wildi, François, Wildi, Thibault, Wright, Jason T.
We present an analysis of Sun-as-a-star observations from four different high-resolution, stabilized spectrographs -- HARPS, HARPS-N, EXPRES, and NEID. With simultaneous observations of the Sun from four different instruments, we are able to gain ins
Externí odkaz:
http://arxiv.org/abs/2309.03762
Autor:
Korolik, Maria, Roettenbacher, Rachael M., Fischer, Debra A., Kane, Stephen R., Perkins, Jean M., Monnier, John D., Davies, Claire L., Kraus, Stefan, Bouquin, Jean-Baptiste Le, Anugu, Narsireddy, Gardner, Tyler, Lanthermann, Cyprien, Schaefer, Gail H., Setterholm, Benjamin, Brewer, John M., Llama, Joe, Zhao, Lily L., Szymkowiak, Andrew E., Henry, Gregory W.
To accurately characterize the planets a star may be hosting, stellar parameters must first be well-determined. $\tau$ Ceti is a nearby solar analog and often a target for exoplanet searches. Uncertainties in the observed rotational velocities have m
Externí odkaz:
http://arxiv.org/abs/2307.10394
Autor:
Brewer, John M., Zhao, Lily L., Fischer, Debra A., Roettenbacher, Rachael M., Henry, Gregory W., Llama, Joe, Szymkowiak, Andrew E., Cabot, Samuel H. C., Weiss, Sam A., McCarthy, Chris
Thousands of exoplanet detections have been made over the last twenty-five years using Doppler observations, transit photometry, direct imaging, and astrometry. Each of these methods is sensitive to different ranges of orbital separations and planeta
Externí odkaz:
http://arxiv.org/abs/2306.06888
Autor:
Piskorz, Danielle, Benneke, Björn, Crockett, Nathan R., Lockwood, Alexandra C., Blake, Geoffrey A., Barman, Travis S., Bender, Chad F., Bryan, Marta L., Carr, John S., Fischer, Debra A., Howard, Andrew W., Isaacson, Howard, Johnson, John A.
We target the thermal emission spectrum of the non-transiting gas giant HD 88133 b with high-resolution near-infrared spectroscopy, by treating the planet and its host star as a spectroscopic binary. For sufficiently deep summed flux observations of
Externí odkaz:
http://hdl.handle.net/10150/622450
http://arizona.openrepository.com/arizona/handle/10150/622450
http://arizona.openrepository.com/arizona/handle/10150/622450
Autor:
Ortiz, Mauricio, Reffert, Sabine, Trifonov, Trifon, Quirrenbach, Andreas, Mitchell, David S., Nowak, Grzegorz, Buenzli, Esther, Zimmerman, Neil, Bonnefoy, Mickaël, Skemer, Andy, Defrère, Denis, Lee, Man Hoi, Fischer, Debra A., Hinz, Philip M.
Context. For over 12 yr, we have carried out a precise radial velocity (RV) survey of a sample of 373 G- and K-giant stars using the Hamilton Echelle Spectrograph at the Lick Observatory. There are, among others, a number of multiple planetary system
Externí odkaz:
http://hdl.handle.net/10150/622444
http://arizona.openrepository.com/arizona/handle/10150/622444
http://arizona.openrepository.com/arizona/handle/10150/622444
Autor:
Zhao, Lily L., Kunovac, Vedad, Brewer, John M., Llama, Joe, Millholland, Sarah C., Hedges, Christina, Szymkowiak, Andrew E., Roettenbacher, Rachael M., Cabot, Samuel H. C., Weiss, Sam A., Fischer, Debra A.
A planet's orbital alignment places important constraints on how a planet formed and consequently evolved. The dominant formation pathway of ultra-short period planets ($P<1$ day) is particularly mysterious as such planets most likely formed further
Externí odkaz:
http://arxiv.org/abs/2212.03953
Autor:
Petigura, Erik, Howard, Andrew, Bean, Jacob, Beichman, Charles, Fischer, Debra, Fulton, BJ, Isaacson, Howard, O'Meara, John, Jordan, Carolyn, Huber, Daniel, Robertson, Paul, Roy, Arpita, Teske, Johanna, Walawender, Josh
The arrival of the Keck Planet Finder (KPF) in 2022 represents a major advance in the precision radial velocity (PRV) capabilities of the W. M. Keck Observatory. In preparation for KPF science, our committee of PRV experts and WMKO staff studied the
Externí odkaz:
http://arxiv.org/abs/2207.06523
Autor:
Zhao, Lily L., Fischer, Debra A., Ford, Eric B., Wise, Alex, Cretignier, Michaël, Aigrain, Suzanne, Barragan, Oscar, Bedell, Megan, Buchhave, Lars A., Camacho, João D., Cegla, Heather M., Cisewski-Kehe, Jessi, Cameron, Andrew Collier, de Beurs, Zoe L., Dodson-Robinson, Sally, Dumusque, Xavier, Faria, João P., Gilbertson, Christian, Haley, Charlotte, Harrell, Justin, Hogg, David W., Holzer, Parker, John, Ancy Anna, Klein, Baptiste, Lafarga, Marina, Lienhard, Florian, Maguire-Rajpaul, Vinesh, Mortier, Annelies, Nicholson, Belinda, Palumbo III, Michael L., Delgado, Victor Ramirez, Shallue, Christopher J., Vanderburg, Andrew, Viana, Pedro T. P., Zhao, Jinglin, Zicher, Norbert, Cabot, Samuel H. C., Henry, Gregory W., Roettenbacher, Rachael M., Brewer, John M., Llama, Joe, Petersburg, Ryan R., Szymkowiak, Andrew E.
Measured spectral shifts due to intrinsic stellar variability (e.g., pulsations, granulation) and activity (e.g., spots, plages) are the largest source of error for extreme precision radial velocity (EPRV) exoplanet detection. Several methods are des
Externí odkaz:
http://arxiv.org/abs/2201.10639
Autor:
Roettenbacher, Rachael M., Cabot, Samuel H. C., Fischer, Debra A., Monnier, John D., Henry, Gregory W., Harmon, Robert O., Korhonen, Heidi, Brewer, John M., Llama, Joe, Petersburg, Ryan R., Zhao, Lily, Kraus, Stefan, Bouquin, Jean-Baptiste Le, Anugu, Narsireddy, Davies, Claire L., Gardner, Tyler, Lanthermann, Cyprien, Schaefer, Gail, Setterholm, Benjamin, Clark, Catherine A., Jorstad, Svetlana G., Kuehn, Kyler, Levine, Stephen
The distortions of absorption line profiles caused by photospheric brightness variations on the surfaces of cool, main-sequence stars can mimic or overwhelm radial velocity (RV) shifts due to the presence of exoplanets. The latest generation of preci
Externí odkaz:
http://arxiv.org/abs/2110.10643