Results 111 to 120 of about 1,764,603 (268)

Survey and Modeling of Windblown Ejecta Deposits on Venus

AGU Advances, Volume 6, Issue 5, October 2025.
Abstract Venus' thick atmosphere rotates in the same direction as the solid body, but ∼60 times faster. This atmospheric superrotation has produced dozens of windblown ejecta deposits (“parabolas”) on the surface of Venus. The formation and modification of parabolas is an interplay between impacts, aeolian modification, and atmospheric dynamics.
T. J. Austin, J. G. O’Rourke, N. Izenberg, E. A. Silber   +3 more
wiley   +1 more source

Gaia-4b and 5b: Radial Velocity Confirmation of Gaia Astrometric Orbital Solutions Reveal a Massive Planet and a Brown Dwarf Orbiting Low-mass Stars

The Astronomical Journal
Gaia astrometry of nearby stars is precise enough to detect the tiny displacements induced by substellar companions, but radial velocity (RV) data are needed for definitive confirmation.
Gudmundur Stefánsson, Suvrath Mahadevan, Joshua N. Winn, Marcus L. Marcussen, Shubham Kanodia, Simon Albrecht, Evan Fitzmaurice, Onė Mikulskytė, Caleb I. Cañas, Juan I. Espinoza-Retamal, Yiri Zwart, Daniel M. Krolikowski, Andrew Hotnisky, Paul Robertson, Jaime A. Alvarado-Montes, Chad F. Bender, Cullen H. Blake, J. R. Callingham, William D. Cochran, Megan Delamer, Scott A. Diddams, Jiayin Dong, Rachel B. Fernandes, Mark R. Giovinazzi, Samuel Halverson, Jessica Libby-Roberts, Sarah E. Logsdon, Michael W. McElwain, Joe P. Ninan, Jayadev Rajagopal, Varghese Reji, Arpita Roy, Christian Schwab, Jason T. Wright   +33 more
doaj   +1 more source

On the Measurement of Ocean Acidity With Ambient Sound

Journal of Geophysical Research: Oceans, Volume 130, Issue 10, October 2025.
Abstract The volume‐integrated pH of seawater can be determined from the frequency and depth dependence of wind‐generated ambient noise in the ocean. Over the 1–10 kHz frequency band, three main processes contribute to the acoustic attenuation in seawater: the chemical relaxation of boric acid and magnesium carbonate (<3 kHz, related to pH) and of ...
Ernst M. Uzhansky, David R. Barclay, Michael J. Buckingham   +2 more
wiley   +1 more source

The NEID Earth Twin Survey. III. Survey Performance after Three Years on Sky

The Astronomical Journal
The NEID Earth Twin Survey (NETS) has been delivering a rich set of precise radial velocity (RV) measurements for 41 bright, nearby main-sequence stars.
Arvind F. Gupta, Evan Fitzmaurice, Suvrath Mahadevan, Paul Robertson, Jacob K. Luhn, Jason T. Wright, Sarah E. Logsdon, Daniel M. Krolikowski, Leonardo A. Paredes, Chad F. Bender, Mark R. Giovinazzi, Andrea S.J. Lin, Cullen H. Blake, Caleb I. Cañas, Eric B. Ford, Samuel Halverson, Shubham Kanodia, Michael W. McElwain, Andrew Monson, Joe P. Ninan, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Guðmundur Stefánsson, Ryan C. Terrien   +24 more
doaj   +1 more source

Planets spinning up their host stars: a twist on the age-activity relationship

, 2013
It is a long-standing question in exoplanet research if Hot Jupiters can influence the magnetic activity of their host stars. While cool stars usually spin down with age and become inactive, an input of angular momentum through tidal interaction, as seen
Poppenhaeger, K., Wolk, S. J.
core   +1 more source

A Candidate Giant Planet Companion to the Massive, Young White Dwarf GALEX J071816.4+373139 Informs the Occurrence of Giant Planets Orbiting B Stars

The Astronomical Journal
It has been suggested that giant planet occurrence peaks for stars with M _*  ≈ 3 M _⊙ at a value a factor of 4 higher than observed for solar-mass stars.
Sihao Cheng, Kevin C. Schlaufman, Ilaria Caiazzo   +2 more
doaj   +1 more source

Exoplanets: Possible Biosignatures

, 2017
The ancestor philosophers' dream of thousands of new worlds is finally realised: about 3500 extrasolar planets have been discovered in the neighborhood of our Sun. Most of them are very different from those we used to know in our Solar System.
Claudi, R.
core   +1 more source

A Pair of Dynamically Interacting Sub-Neptunes around TOI-6054

The Astronomical Journal
We confirm the planetary nature of a pair of transiting sub-Neptune exoplanets orbiting the bright F-type subgiant star TOI-6054 ( V = 8.02, K = 6.673) as a part of the OrCAS radial velocity survey using WIYN/NEID observations. We find that TOI-6054b and
Maxwell A. Kroft, Thomas G. Beatty, Ian J. M. Crossfield, Joseph R. Livesey, Juliette Becker, Jacob K. Luhn, Paul Robertson, Allyson Bieryla, David R. Ciardi, Catherine A. Clark, Maria V. Goliguzova, Steve B. Howell, Jack J. Lissauer, Colin Littlefield, Michael B. Lund, Boris S. Safonov, Joseph M. Akana Murphy, Natalie M. Batalha, Malik Bossett, Jonathan Brande, Tansu Daylan, Courtney Dressing, Anna Gagnebin, Daniel Huber, Howard Isaacson, Stephen R. Kane, Laura Kreidberg, David W. Latham, Rafael Luque, Alex S. Polanski, Pranav H. Premnath, Maleah Rhem, Claire J. Rogers, Emma V. Turtelboom   +33 more
doaj   +1 more source

EUCLID : Dark Universe Probe and Microlensing planet Hunter

, 2010
There is a remarkable synergy between requirements for Dark Energy probes by cosmic shear measurements and planet hunting by microlensing. Employing weak and strong gravitational lensing to trace and detect the distribution of matter on cosmic and ...
Batista, V, Beaulieu, J P, Bennett, D P, Cassan, A, Dong, S, Fouqué, P, Gaudi, B S, Gelino, Dawn M, Gould, A, Kerins, Eamonn, Kerrins, E, Kubas, D, Mao, S, Miralda-Escudé, J, Ribas, Ignasi, Wambsganss, J   +15 more
core  

Kepler Observations of the Three Pre-Launch Exoplanet Candidates: Discover of Two Eclipsing Binaries and a New Exoplanet [PDF]

, 2010
Three transiting exoplanet candidate stars were discovered in a ground-based photometric survey prior to the launch of NASA's Kepler mission. Kepler observations of them were obtained during Quarter 1 of the Kepler mission.
Bryson, Stephen T., Ciardi, David R., Feldmeier, John J., Horch, Elliott, Howell, Steve B., Rowe, Jason F., Sherry, William, van Belle, Gerard T., von Braun, Kaspar   +8 more
core