Results 71 to 80 of about 22,347,435 (253)

A Candidate High-velocity Exoplanet System in the Galactic Bulge

The Astronomical Journal
Abstract We present an analysis of adaptive optics images from the Keck I telescope of the microlensing event MOA-2011-BLG-262. The original discovery paper by Bennett et al. reports two possibilities for the lens system: a nearby gas giant lens with an exomoon companion or a very low-mass star with a planetary companion in the Galactic ...
Sean K. Terry, Jean‐Philippe Beaulieu, D. P. Bennett, Aparna Bhattacharya, Jon Hulberg, Macy Huston, Naoki Koshimoto, Joshua W. Blackman, I. A. Bond, Andrew A. Cole, Jessica R. Lu, ‪Clément Ranc, Natalia E. Rektsini, Aikaterini Vandorou   +13 more
openalex   +6 more sources

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions

The Astronomical Journal, 2023
Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6 m class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high-priority goal of the Astro2020 Decadal Survey.
Katherine Laliotis, Jennifer A. Burt, Eric E. Mamajek, Zhexing Li, Volker Perdelwitz, Jinglin Zhao, R. Paul Butler, Bradford Holden, Lee Rosenthal, B. J. Fulton, Fabo Feng, Stephen R. Kane, Jeremy Bailey, Brad Carter, Jeffrey D. Crane, Elise Furlan, Crystal L. Gnilka, Steve B. Howell, Gregory Laughlin, Stephen A. Shectman, Johanna K. Teske, C. G. Tinney, Steven S. Vogt, Sharon Xuesong Wang, Robert A. Wittenmyer   +24 more
doaj   +1 more source

Exoplanets Torqued by the Combined Tides of a Moon and Parent Star [PDF]

, 2018
In recent years, there has been interest in Earth-like exoplanets in the habitable zones of low mass stars ($\sim0.1-0.6\,M_\odot$). Furthermore, it has been argued that a large moon may be important for stabilizing conditions on a planet for life. If these two features are combined, then an exoplanet can feel a similar tidal influence from both its ...
arxiv   +1 more source

The observation of exoplanet transit events in China

EPJ Web of Conferences, 2011
We have carried out a research project on the exoplanet transit events at Yunnan Observatory. By using CCD cameras attached to 1m telescope of Yunnan Observatory and 85cm telescope of Xinglong station, NAOC, a group of exoplanet systems with transit ...
Fang X.-S., Collier Cameron A., Gu S.-H., Wang X.-B.   +3 more
doaj   +1 more source

Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates

The Astronomical Journal, 2023
In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj   +1 more source

Chemical modeling of exoplanet atmospheres [PDF]

, 2014
The past twenty years have revealed the diversity of planets that exist in the Universe. It turned out that most of exoplanets are different from the planets of our Solar System and thus, everything about them needs to be explored. Thanks to current observational technologies, we are able to determine some information about the atmospheric composition,
arxiv   +1 more source

Zehn Jahre Gaia‐Messungen: Die hochgenaue Kartierung des Himmels

Physik in unserer Zeit, EarlyView.
Das astrometrische Weltraumobservatorium Gaia der Europäischen Weltraumorganisation hat die astrometrische Forschung revolutioniert, indem es unter anderem präzise Positionen, Bewegungen und Entfernungen von fast zwei Milliarden Himmelsobjekten gemessen hat. Damit stellt es wertvolle Daten für fast alle Gebiete der Astrophysik bereit. Nach dem Ende der
Stefan Jordan
wiley   +1 more source

Complex apodization Lyot coronagraphy for the direct imaging of exoplanet systems: design, fabrication, and laboratory demonstration

Other Conferences, 2012
We review the design, fabrication, performance, and future prospects for a complex apodized Lyot coronagraph for highcontrast exoplanet imaging and spectroscopy. We present a newly designed circular focal plane mask with an inner working angle of 2.5 λ/D.
J. Trauger, D. Moody, Brian Gordon, J. Krist, D. Mawet   +4 more
semanticscholar   +1 more source

Using the inclinations of Kepler systems to prioritize new Titius-Bode-based exoplanet predictions [PDF]

, 2014
We analyse a sample of multiple-exoplanet systems which contain at least three transiting planets detected by the Kepler mission (‘Kepler multiples’). We use a generalized Titius– Bode relation to predict the periods of 228 additional planets in 151 of ...
Timothy Bovaird, C. Lineweaver, S. Jacobsen   +2 more
semanticscholar   +1 more source

The role of boundary‐layer friction in modulating midlatitude heatwaves

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Boundary‐layer friction associated with different surface types plays an important role in modulating heatwaves in the midlatitudes. The main changes in heatwave features occur when locally modifying boundary‐layer friction along the jet‐stream axis. Real‐world differences in the occurrence of heatwaves between different locations in the midlatitudes ...
E. Russo, W. Wicker, D. Folini, D. I. V. Domeisen   +3 more
wiley   +1 more source