Zobrazeno 1 - 10
of 1 614
pro vyhledávání: '"KING, GEORGE A."'
We present an adaptation of the exoplanet transit model code batman, in order to permit the generation of X-ray transits. Our underlying extended coronal model assumes an isothermal plasma that is radially symmetric. While this ignores the effect of
Externí odkaz:
http://arxiv.org/abs/2410.01559
Detecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high energy irradiation on the upper atmospheres of planets. However, stars are relatively dim in the X-ray, making exoplanet transit detections difficult wi
Externí odkaz:
http://arxiv.org/abs/2408.06417
Autor:
Levine, W. Garrett, Vissapragada, Shreyas, Feinstein, Adina D., King, George W., Hernandez, Aleck, Corrales, Lia, Greklek-McKeon, Michael, Knutson, Heather A.
Aeronomy, the study of Earth's upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to solar variability in the X-ray and extreme ultraviolet (coll
Externí odkaz:
http://arxiv.org/abs/2405.19177
Autor:
Alam, Munazza K., Kirk, James, Santos, Leonardo A. Dos, McCreery, Patrick, Allan, Andrew P., Owen, James E., Vidotto, Aline A., Allart, Romain, Bourrier, Vincent, Espinoza, Néstor, King, George W., López-Morales, Mercedes, Seidel, Julia V.
We search for excess in-transit absorption of neutral helium at 1.083 $\mu$m in the atmospheres of the young (<800 Myr) sub-Jovian (0.2-0.5 $\rm R_{J}$) planets HD 63433b, K2-100b, and V1298 Tau c using high-resolution (R~25,000) transit observations
Externí odkaz:
http://arxiv.org/abs/2405.17294
Autor:
King, George W., Corrales, Lía R., Fernández, Jorge Fernández, Wheatley, Peter J., Malsky, Isaac, Osborn, Ares, Armstrong, David
One of the leading mechanisms invoked to explain the existence of the radius valley is atmospheric mass loss driven by X-ray and extreme-ultraviolet irradiation, with this process stripping the primordial envelopes of young, small planets to produce
Externí odkaz:
http://arxiv.org/abs/2404.10673
Autor:
Corrales, Lia, Stassun, Keivan G., Cunningham, Tim, Duvvuri, Girish, Drake, Jeremy J., Espaillat, Catherine, Feinstein, Adina D., Gallo, Elena, Gunther, Hans Moritz, King, George W., Kounkel, Marina, Lisse, Carey M., Montez Jr., Rodolfo, Principe, David A., Toala, Jesus A., Wolk, Scott J., Cilley, Raven, Daylan, Tansu, Karovska, Margarita, Pradhan, Pragati, Wheatley, Peter J., Yang, Jun
One of the key research themes identified by the Astro2020 decadal survey is Worlds and Suns in Context. The Advanced X-ray Imaging Satellite (AXIS) is a proposed NASA APEX mission that will become the prime high-energy instrument for studying star-p
Externí odkaz:
http://arxiv.org/abs/2311.07674
Autor:
Green, Matthew J., Hermes, J. J., Barlow, Brad N., Marsh, T. R., Pelisoli, Ingrid, Gänsicke, Boris T., Kaiser, Ben C., Romero, Alejandra, Amaral, Larissa Antunes, Corcoran, Kyle, Grupe, Dirk, Kennedy, Mark R., Kepler, S. O., Munday, James, Ashley, R. P., Baran, Andrzej S., Breedt, Elmé, Brown, Alex J., Dhillon, V. S., Dyer, Martin J., Kerry, Paul, King, George W., Littlefair, S. P., Parsons, Steven G., Sahman, David I.
AM CVn-type systems are ultracompact, helium-accreting binary systems which are evolutionarily linked to the progenitors of thermonuclear supernovae and are expected to be strong Galactic sources of gravitational waves detectable to upcoming space-ba
Externí odkaz:
http://arxiv.org/abs/2311.01255
Autor:
Reynolds, Christopher S., Kara, Erin A., Mushotzky, Richard F., Ptak, Andrew, Koss, Michael J., Williams, Brian J., Allen, Steven W., Bauer, Franz E., Bautz, Marshall, Bodaghee, Arash, Burdge, Kevin B., Cappelluti, Nico, Cenko, Brad, Chartas, George, Chan, Kai-Wing, Corrales, Lía, Daylan, Tansu, Falcone, Abraham D., Foord, Adi, Grant, Catherine E., Habouzit, Mélanie, Haggard, Daryl, Herrmann, Sven, Hodges-Kluck, Edmund, Kargaltsev, Oleg, King, George W., Kounkel, Marina, Lopez, Laura A., Marchesi, Stefano, McDonald, Michael, Meyer, Eileen, Miller, Eric D., Nynka, Melania, Okajima, Takashi, Pacucci, Fabio, Russell, Helen R., Safi-Harb, Samar, Stassun, Keivan G., Falcão, Anna Trindade, Walker, Stephen A., Wilms, Joern, Yukita, Mihoko, Zhang, William W.
The Advanced X-ray Imaging Satellite (AXIS) is a Probe-class concept that will build on the legacy of the Chandra X-ray Observatory by providing low-background, arcsecond-resolution imaging in the 0.3-10 keV band across a 450 arcminute$^2$ field of v
Externí odkaz:
http://arxiv.org/abs/2311.00780
The Neptunian desert is a region in period-radius parameter space with very few Neptune-sized planets at short orbital periods. Amongst these, LTT 9779 b is the only known Neptune with a period shorter than one day to retain a significant H-He atmosp
Externí odkaz:
http://arxiv.org/abs/2310.13171
Autor:
Osborn, Ares, Armstrong, David J., Fernández, Jorge Fernández, Knierim, Henrik, Adibekyan, Vardan, Collins, Karen A., Delgado-Mena, Elisa, Fridlund, Malcolm, da Silva, João Gomes, Hellier, Coel, Jackson, David G., King, George W., Lillo-Box, Jorge, Matson, Rachel A., Matthews, Elisabeth C., Santos, Nuno C., Sousa, Sérgio G., Stassun, Keivan G., Tan, Thiam-Guan, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Bayliss, Daniel, Bouma, Luke G., Ciardi, David R., Collins, Kevin I., Colón, Knicole D., Crossfield, Ian J. M., Demangeon, Olivier D. S., Díaz, Rodrigo F., Dorn, Caroline, Dumusque, Xavier, Keniger, Marcelo Aron Fetzner, Figueira, Pedro, Gan, Tianjun, Goeke, Robert F., Hadjigeorghiou, Andreas, Hawthorn, Faith, Helled, Ravit, Howell, Steve B., Nielsen, Louise D., Osborn, Hugh P., Quinn, Samuel N., Sefako, Ramotholo, Shporer, Avi, Strøm, Paul A., Twicken, Joseph D., Vanderburg, Andrew, Wheatley, Peter J.
To date, thousands of planets have been discovered, but there are regions of the orbital parameter space that are still bare. An example is the short period and intermediate mass/radius space known as the Neptunian desert, where planets should be eas
Externí odkaz:
http://arxiv.org/abs/2308.12137