Zobrazeno 1 - 10
of 307
pro vyhledávání: '"Oklopcic, A."'
Recent observations of planetary atmospheres in HAT-P-32 b and HAT-P-67 b reveal extensive outflows reaching up to hundreds of planetary radii. The helium 1083 nm light curves for these planets, captured across their full orbits, show notable asymmet
Externí odkaz:
http://arxiv.org/abs/2410.19381
Studying atmospheric escape from exoplanets can provide important clues about the formation and evolution of exoplanets. Observational evidence of atmospheric escape has been obtained through transit spectroscopy in strong spectral lines of various a
Externí odkaz:
http://arxiv.org/abs/2410.03228
Autor:
Barat, Saugata, Désert, Jean-Michel, Goyal, Jayesh M., Vazan, Allona, Kawashima, Yui, Fortney, Jonathan J., Bean, Jacob L., Line, Michael R., Panwar, Vatsal, Jacobs, Bob, Shivkumar, Hinna, Sikora, James, Baeyens, Robin, Oklopcić, Antonija, David, Trevor J., Livingston, John H.
The V1298 Tau system (20-30Myr), is a benchmark young multi-planet system that provides the opportunity to perform comparative exoplanetology between planets orbiting the same star right after their formation. We present the first atmospheric compari
Externí odkaz:
http://arxiv.org/abs/2407.14995
Publikováno v:
A&A 688, A43 (2024)
Atmospheric escape is thought to significantly influence the evolution of exoplanets, especially for sub-Jupiter planets on short orbital periods. Theoretical models predict that hydrodynamic escape could erode the atmospheres of such gaseous planets
Externí odkaz:
http://arxiv.org/abs/2404.12775
Autor:
Saidel, Morgan, Vissapragada, Shreyas, Spake, Jessica, Knutson, Heather A., Linssen, Dion, Zhang, Michael, Greklek-McKeon, Michael, González, Jorge Pérez, Oklopčić, Antonija
The lack of close-in Neptune-mass exoplanets evident in transit surveys has largely been attributed either to photoevaporative mass loss or high-eccentricity migration. To distinguish between these two possibilities, we investigate the origins of TOI
Externí odkaz:
http://arxiv.org/abs/2404.08736
Autor:
Vissapragada, Shreyas, Greklek-McKeon, Michael, Linssen, Dion, MacLeod, Morgan, Thorngren, Daniel P., Gao, Peter, Knutson, Heather A., Latham, David W., López-Morales, Mercedes, Oklopčić, Antonija, González, Jorge Pérez, Saidel, Morgan, Tumborang, Abigail, Yoshida, Stephanie
Super-puffs are planets with exceptionally low densities ($\rho \lesssim 0.1$~g~cm$^{-3}$) and core masses ($M_c \lesssim 5 M_\oplus$). Many lower-mass ($M_p\lesssim10M_\oplus$) super-puffs are expected to be unstable to catastrophic mass loss via ph
Externí odkaz:
http://arxiv.org/abs/2403.05614
A notable fraction of helium observations probing the evaporating atmospheres of short-period gas giants at 1083~nm exhibit a blueshift during transit, which might be indicative of a day-to-night side flow. In this study, we explore the gas dynamic e
Externí odkaz:
http://arxiv.org/abs/2312.04682
Studying the escaping atmospheres of highly-irradiated exoplanets is critical for understanding the physical mechanisms that shape the demographics of close-in planets. A number of planetary outflows have been observed as excess H/He absorption durin
Externí odkaz:
http://arxiv.org/abs/2312.02381
Autor:
González, Jorge Pérez, Greklek-McKeon, Michael, Vissapragada, Shreyas, Saidel, Morgan, Knutson, Heather A., Linssen, Dion, Oklopčić, Antonija
Photoevaporative mass-loss rates are expected to be highest when planets are young and the host star is more active, but to date there have been relatively few measurements of mass-loss rates for young gas giant exoplanets. In this study we measure t
Externí odkaz:
http://arxiv.org/abs/2307.09515
Autor:
Gully-Santiago, Michael, Morley, Caroline V., Luna, Jessica, MacLeod, Morgan, Oklopčić, Antonija, Ganesh, Aishwarya, Tran, Quang H., Zhang, Zhoujian, Bowler, Brendan P., Cochran, William D., Krolikowski, Daniel M., Mahadevan, Suvrath, Ninan, Joe P., Stefánsson, Guðmundur, Vanderburg, Andrew, Zalesky, Joseph A., Zeimann, Gregory R.
Atmospheric escape shapes the fate of exoplanets, with statistical evidence for transformative mass loss imprinted across the mass-radius-insolation distribution. Here we present transit spectroscopy of the highly irradiated, low-gravity, inflated ho
Externí odkaz:
http://arxiv.org/abs/2307.08959