Results 71 to 80 of about 1,706 (153)

Separating Super-puffs versus Hot Jupiters among Young Puffy Planets

The Astrophysical Journal
Discoveries of close-in young puffy ( R _p ≳ 6 R _⊕ ) planets raise the question of whether they are bona fide hot Jupiters or puffed-up Neptunes, potentially placing constraints on the formation location and timescale of hot Jupiters.
Amalia Karalis, Eve J. Lee, Daniel P. Thorngren   +2 more
doaj   +1 more source

Introduction to magnetic star-planet interactions

10 pages, 2 figures, to be published as a chapter in 'Space Environments and their Impact on Exoplanets', editor O ...
Strugarek, A., Shkolnik, E.
openaire   +2 more sources

Radio signatures of star–planet interactions, exoplanets and space weather

Nature Astronomy
Radio detections of stellar systems provide a window onto stellar magnetic activity and the space weather conditions of extrasolar planets, information that is difficult to attain at other wavelengths. There have been recent advances observing auroral emissions from radio-bright low-mass stars and exoplanets largely due to the maturation of low ...
Callingham, J., Pope, B., Kavanagh, R., Bellotti, S., Daley-Yates, S., Damasso, M., Grießmeier, J.-M., Güdel, M., Günther, M., Kao, M., Klein, B., Mahadevan, S., Morin, J., Nichols, J., Osten, R., Pérez-Torres, M., Pineda, J., Rigney, J., Saur, J., Stefánsson, G., Turner, J., Vedantham, H., Vidotto, A., Villadsen, J., Zarka, P.   +24 more
openaire   +5 more sources

Damping Obliquities of Hot Jupiter Hosts by Resonance Locking

The Astrophysical Journal Letters
When orbiting hotter stars, hot Jupiters are often highly inclined relative to their host star equator planes. By contrast, hot Jupiters orbiting cooler stars are more aligned.
J. J. Zanazzi, Janosz Dewberry, Eugene Chiang   +2 more
doaj   +1 more source

Constraining Ongoing Volcanic Outgassing Rates and Interior Compositions of Extrasolar Planets with Mass Measurements of Plasma Tori

The Astrophysical Journal Letters
We present a novel method of constraining volcanic activity on extrasolar terrestrial worlds via characterization of circumstellar plasma tori. Our work generalizes the physics of the Io plasma torus to propose a hypothetical circumstellar plasma torus ...
V. Abby Boehm, Darryl Z. Seligman, Nikole K. Lewis   +2 more
doaj   +1 more source

Evaluating Star–Planet Interactions with Zeeman Doppler Imaging: Case Study in YZ Ceti

The Astrophysical Journal
The recent detections of radio emission from the nearby exoplanet host, YZ Ceti, suggest that the star is possibly interacting with its rocky innermost planet.
J. Sebastian Pineda, Stefano Bellotti, Jackie Villadsen, Aline Vidotto, Julien Morin, Colin P. Folsom   +5 more
doaj   +1 more source

C3PO. III. On the Lithium Signatures following Planet Engulfment by Stars

The Astrophysical Journal
Planet engulfment has been identified as one of the mechanisms for enhancing lithium abundance in stars. However, comprehensive investigations into lithium signatures following such events remain limited.
Qinghui Sun, Yuan-Sen Ting, Fan Liu, Sharon Xuesong Wang, Barbara J. Anthony-Twarog, Bruce A. Twarog, Jia-Yi Yang, Di-Chang Chen, Amanda I. Karakas, Ji-Wei Xie, David Yong   +10 more
doaj   +1 more source

The OATMEAL Survey. II. The 3D Spin–Orbit Obliquity of an Eccentric Transiting Brown Dwarf in the Ruprecht 147 Open Cluster

The Astronomical Journal
We present a new analysis of the CWW 89 system as part of the Orbital Architectures of Transiting Massive Exoplanets And Low-mass stars (OATMEAL) survey. The CWW 89 system is a member of the 2.8 Gyr old Ruprecht 147 (NGC 6774) cluster and consists of two
Theron W. Carmichael, Steven Giacalone, Noah Vowell, Daniel Huber, Xian-Yu Wang, Malik Bossett, Luke Handley, Aaron Householder, Yaguang Li, Benjamin J. Fulton, Andrew W. Howard, Howard Isaacson, Samuel Halverson, Arpita Roy   +13 more
doaj   +1 more source

uGMRT Survey of EXoplanets Around M-dwarfs (GS-EXAM): Radio Observations of GJ 1151

The Astronomical Journal
Coherent radio emission with properties similar to planetary auroral signals has been reported from GJ 1151, a quiescent, slow-rotating mid-M star, by the LOFAR Two-meter (120–170 MHz) Sky Survey.
Mayank Narang, Manoj Puravankara, H. K. Vedantham, C. H. Ishwara-Chandra, Ayanabha De, Himanshu Tyagi, Bihan Banerjee, Prasanta K. Nayak, Arun Surya, B. Shridharan, Vinod C. Pathak, Mihir Tripathi   +11 more
doaj   +1 more source

X-Ray Irradiation of the Giant Planet Orbiting the T Tauri Star TAP 26

The Astrophysical Journal
We present new Chandra X-ray observations of TAP 26, a ≈17 Myr old magnetically active weak-lined T Tauri star that has been reported to host a massive planet in a ≈10.8 day orbit.
Stephen L. Skinner, Manuel Güdel
doaj   +1 more source