Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Cretignier, Michaël"'
Autor:
Yu, Haochuan, Aigrain, Suzanne, Klein, Baptiste, Cretignier, Michael, Lienhard, Florian, Roberts, Stephen J.
Stellar active regions like spots and faculae can distort the shapes of spectral lines, inducing variations in the radial velocities that are often orders of magnitude larger than the signals from Earth-like planets. Efforts to mitigate these activit
Externí odkaz:
http://arxiv.org/abs/2410.12698
Autor:
Thygesen, Erica, Rodriguez, Joseph E., De Beurs, Zoë L., Vanderburg, Andrew, Livingston, John H., Irwin, Jonathon, Venner, Alexander, Cretignier, Michael, Collins, Karen A., Bieryla, Allyson, Charbonneau, David, Crossfield, Ian J. M., Dumusque, Xavier, Kielkopf, John, Latham, David W., Werner, Michael
K2-2 b/HIP 116454 b, the first exoplanet discovery by K2 during its Two-Wheeled Concept Engineering Test, is a sub-Neptune (2.5 $\pm$ 0.1 $R_\oplus$, 9.7 $\pm$ 1.2 $M_\oplus$) orbiting a relatively bright (KS = 8.03) K-dwarf on a 9.1 day period. Unfo
Externí odkaz:
http://arxiv.org/abs/2409.07019
Autor:
Zhao, Yinan, Dumusque, Xavier, Cretignier, Michael, Cameron, Andrew Collier, Latham, David W., López-Morales, Mercedes, Mayor, Michel, Sozzetti, Alessandro, Cosentino, Rosario, Gómez-Vargas, Isidro, Pepe, Francesco, Udry, Stephane
Publikováno v:
A&A 687, A281 (2024)
Many novel methods have been proposed to mitigate stellar activity for exoplanet detection as the presence of stellar activity in radial velocity (RV) measurements is the current major limitation. Unlike traditional methods that model stellar activit
Externí odkaz:
http://arxiv.org/abs/2405.13247
Autor:
Klein, Baptiste, Aigrain, Suzanne, Cretignier, Michael, Moulla, Khaled Al, Dumusque, Xavier, Barragán, Oscar, Yu, Haochuan, Mortier, Annelies, Rescigno, Federica, Cameron, Andrew Collier, López-Morales, Mercedes, Meunier, Nadège, Sozzetti, Alessandro, O'Sullivan, Niamh K.
Stellar magnetic activity induces both distortions and Doppler-shifts in the absorption line profiles of Sun-like stars. Those effects produce apparent radial velocity (RV) signals which greatly hamper the search for potentially habitable, Earth-like
Externí odkaz:
http://arxiv.org/abs/2405.12065
Autor:
Barragán, Oscar, Yu, Haochuan, Freckelton, Alix Violet, Meech, Annabella, Cretignier, Michael, Mortier, Annelies, Aigrain, Suzanne, Klein, Baptiste, O'Sullivan, Niamh K., Gillen, Edward, Nielsen, Louise Dyregaard, Mallorquín, Manuel, Zicher, Norbert
We present an exhaustive photometric and spectroscopic analysis of TOI-837, a F9/G0 35 Myr young star, hosting a transiting exoplanet, TOI-837b, with an orbital period of 8.32d. Utilising data from TESS and ground-based observations, we determine a p
Externí odkaz:
http://arxiv.org/abs/2404.13750
Autor:
Yu, Haochuan, Aigrain, Suzanne, Klein, Baptiste, Barragán, Oscar, Mortier, Annelies, O'Sullivan, Niamh K., Cretignier, Michael
Although instruments for measuring the radial velocities (RVs) of stars now routinely reach sub-meter per second accuracy, the detection of low-mass planets is still very challenging. The rotational modulation and evolution of spots and/or faculae ca
Externí odkaz:
http://arxiv.org/abs/2401.05528
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
RASSINE: Interactive tool for normalising stellar spectra I. Description and performance of the code
Publikováno v:
A&A 640, A42 (2020)
Aims: We provide an open-source code allowing an easy, intuitive, and robust normalisation of spectra. Methods: We developed RASSINE, a Python code for normalising merged 1D spectra through the concepts of convex hulls. The code uses six parameters t
Externí odkaz:
http://arxiv.org/abs/2006.13098
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