Results 21 to 30 of about 1,148 (222)

HD 209458 planetary transits from Hipparcos photometry

, 2000
During its 39-month mission, Hipparcos observed the star HD 209458 on 89 occasions. Five of these observations are shown to correspond to epochs of planetary transits, with a 2.3±0.4% mean decrease of flux in the Hpband being observed during the transits.
N. Robichon, F. Arenou
openalex   +3 more sources

Constraining the oblateness of transiting planets with photometry and spectroscopy [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Rapid planetary rotation can cause the equilibrium shape of a planet to be oblate. While planetary oblateness has mostly been probed by examining the subtle ingress and egress features in photometric transit light curves, we investigate the effect of oblateness on the spectroscopic Rossiter–McLaughlin (RM) signals. We found that
Nuno C. Santos, Mahmoudreza Oshagh, Mahmoudreza Oshagh, Mahmoudreza Oshagh, S. C. C. Barros, B. Akinsanmi, L M Serrano   +6 more
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TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica

The Astronomical Journal, 2023
We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr ...
Melissa J. Hobson, Trifon Trifonov, Thomas Henning, Andrés Jordán, Felipe Rojas, Nestor Espinoza, Rafael Brahm, Jan Eberhardt, Matías I. Jones, Djamel Mekarnia, Diana Kossakowski, Martin Schlecker, Marcelo Tala Pinto, Pascal José Torres Miranda, Lyu Abe, Khalid Barkaoui, Philippe Bendjoya, François Bouchy, Marco Buttu, Ilaria Carleo, Karen A. Collins, Knicole D. Colón, Nicolas Crouzet, Diana Dragomir, Georgina Dransfield, Thomas Gasparetto, Robert F. Goeke, Tristan Guillot, Maximilian N. Günther, Saburo Howard, Jon M. Jenkins, Judith Korth, David W. Latham, Monika Lendl, Jack J. Lissauer, Christopher R. Mann, Ismael Mireles, George R. Ricker, Sophie Saesen, Richard P. Schwarz, S. Seager, Ramotholo Sefako, Avi Shporer, Chris Stockdale, Olga Suarez, Thiam-Guan Tan, Amaury H. M. J. Triaud, Solène Ulmer-Moll, Roland Vanderspek, Joshua N. Winn, Bill Wohler, George Zhou   +51 more
doaj   +1 more source

Kepler Bonus: Light Curves of Kepler Background Sources

The Astronomical Journal, 2023
NASA’s Kepler primary mission observed about 116 deg ^2 in the sky for 3.5 consecutive years to discover Earth-like exoplanets. This mission recorded pixel cutouts, known as target pixel files (TPFs), of over 200,000 targets that were selected to ...
Jorge Martínez-Palomera, Christina Hedges, Jessie Dotson   +2 more
doaj   +1 more source

A Blind Search for Transit Depth Variability with TESS

The Astronomical Journal, 2023
The phenomenon of transit depth variability offers a pathway through which processes such as exoplanet atmospheric activity and orbital dynamics can be studied.
Gavin Wang, Néstor Espinoza
doaj   +1 more source

TOI-4600 b and c: Two Long-period Giant Planets Orbiting an Early K Dwarf

The Astrophysical Journal Letters, 2023
We report the discovery and validation of two long-period giant exoplanets orbiting the early K dwarf TOI-4600 ( V = 12.6, T = 11.9), first detected using observations from the Transiting Exoplanet Survey Satellite (TESS) by the TESS Single Transit ...
Ismael Mireles, Diana Dragomir, Hugh P. Osborn, Katharine Hesse, Karen A. Collins, Steven Villanueva, Allyson Bieryla, David R. Ciardi, Keivan G. Stassun, Mallory Harris, Jack J. Lissauer, Richard P. Schwarz, Gregor Srdoc, Khalid Barkaoui, Arno Riffeser, Kim K. McLeod, Joshua Pepper, Nolan Grieves, Vera Maria Passegger, Solène Ulmer-Moll, Joseph E. Rodriguez, Dax L. Feliz, Samuel Quinn, Andrew W. Boyle, Michael Fausnaugh, Michelle Kunimoto, Pamela Rowden, Andrew Vanderburg, Bill Wohler, Jon M. Jenkins, David W. Latham, George R. Ricker, Sara Seager, Joshua N. Winn   +33 more
doaj   +1 more source

Exoplanet transit spectro-photometry with SOFIA [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractWe present the prospects of observing extrasolar planets with the Stratospheric Observatory for Infrared Astronomy (SOFIA). Our analysis shows that optical and near-infrared photometric and spectrophotometric follow-up observations during planetary transits and\break eclipses will be feasible with SOFIA's instrumentation, especially with the ...
Hans Zinnecker, Alfred Krabbe, Daniel Angerhausen   +2 more
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Transit Photometry as an Exoplanet Discovery Method [PDF]

, 2018
Photometry with the transit method has arguably been the most successful exoplanet discovery method to date. A short overview about the rise of that method to its present status is given. The method's strength is the rich set of parameters that can be obtained from transiting planets, in particular in combination with radial velocity observations; the ...
Hans J. Deeg, Roi Alonso
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The effects of star spots on transit photometry [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractWe have undertaken an observational program to photometrically monitor several transiting planet host stars. The Rabus et al. result for TrES-1 showed the dramatic effects star spots can have on transit photometry. We will investigate the effects of spots on transit light curves and estimates of planetary radii.
Damian J. Christian, John R. Hodgson
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No Conclusive Evidence for Transits of Proxima b in MOST Photometry [PDF]

The Astronomical Journal, 2017
Abstract The analysis of Proxima Centauri’s radial velocities recently led Anglada-Escudé et al. to claim the presence of a low-mass planet orbiting the Sun’s nearest star once every 11.2 days. Although the a priori probability that Proxima b transits its parent star is just 1.5%, the potential impact of such a discovery would be ...
Robert J. Siverd, Rainer Kuschnig, Z. Csubry, Gáspár Á. Bakos, Anthony F. J. Moffat, Joao Bento, Chris Cameron, David B. Guenther, Luigi Mancini, Joel D. Hartman, Andrés Jordán, Andrés Jordán, Jingjing Chen, Daniel Bayliss, Emily Sandford, Thomas Henning, Waqas Bhatti, James R. A. Davenport, Werner W. Weiss, Jason F. Rowe, David M. Kipping, Kaloyan Penev, Slavek M. Rucinski, Dimitar Sasselov, Jaymie M. Matthews   +24 more
openaire   +4 more sources