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We present the first systematic search for GHz frequency radio emission from directly imaged exoplanets using Very Large Array (VLA) observations of sufficient angular resolution to separate the planets from their host stars. We obtained…

Earth and Planetary Astrophysics · Physics 2021-12-22 Yvette Cendes , Peter K. G. Williams , Edo Berger

To date, the search for radio technosignatures has focused on sky location as a primary discriminant between technosignature candidates and anthropogenic radio frequency interference (RFI). In this work, we investigate the possibility of…

Instrumentation and Methods for Astrophysics · Physics 2023-07-19 Bryan Brzycki , Andrew P. V. Siemion , Imke de Pater , James M. Cordes , Vishal Gajjar , Brian Lacki , Sofia Sheikh

In this paper we consider the magnetosphere-ionosphere (M-I) coupling at Jupiter-like exoplanets with internal plasma sources such as volcanic moons, and we have determined the best candidates for detection of these radio emissions by…

Earth and Planetary Astrophysics · Physics 2015-06-11 J. D. Nichols

There have been periodic efforts in recent decades to search for extraterrestrial intelligence (SETI), especially by trying to find an extraterrestrial (ET) radio signal or other technosignature in space. Yet, no such technosignatures have…

Popular Physics · Physics 2019-07-24 Ross Davis

Radio observations provide a window into a planet's interior and play a crucial role in studying its atmosphere and surface, key factors to find potential habitability. The discovery of thousands of exoplanets, together with advances in…

Earth and Planetary Astrophysics · Physics 2025-10-23 Mahdiyar Mousavi-Sadr , Fatemeh S. Tabatabaei , Alexander Wolszczan , Ghassem Gozaliasl

The Atacama Millimeter/Submillimeter Array (ALMA) remains unparalleled in sensitivity at radio frequencies above 35 GHz. In this paper, we explore ALMA's potential for narrowband technosignature detection, considering factors such as the…

Instrumentation and Methods for Astrophysics · Physics 2024-12-02 Louisa A Mason , Michael A Garrett , Kelvin Wandia , Andrew P V Siemion

Traditional searches for extraterrestrial intelligence (SETI) or "technosignatures" focus on dedicated observations of single stars or regions in the sky to detect excess or transient emission from intelligent sources. The newest generation…

Instrumentation and Methods for Astrophysics · Physics 2019-07-11 James. R. A. Davenport

We have searched for nonastrophysical emission lines in the optical spectra of 577 nearby F, G, K, and M main-sequence stars. Emission lines of astrophysical origin would also have been detected, such as from a time--variable chromosphere…

Astrophysics · Physics 2015-06-24 Amy E. Reines , Geoffrey W. Marcy

Discovering new actively-accreting protoplanets is crucial to answering open questions about planet formation. However, identifying such planets at orbital distances where they are expected to be abundant is extremely challenging, both due…

We present the target selection for the Breakthrough Listen search for extraterrestrial intelligence during the first year of observations at the Green Bank Telescope, Parkes Telescope and Automated Planet Finder. On the way to observing…

The launch of the Kepler mission on 7th March 2009 opened a new bright future for the search of extra-solar planets while a huge amount of stars will be observed leading to the opportunity to better understand stellar evolution. This will…

Solar and Stellar Astrophysics · Physics 2010-04-30 S. Mathur , R. A. Garcia , C. Regulo , O. L. Creevey , J. Ballot , D. Salabert

The Kepler Mission recently identified 997 systems hosting candidate extrasolar planets, many of which are super-Earths. Realizing these planetary systems are candidates to host extrasolar asteroid belts, we use mid-infrared data from the…

Earth and Planetary Astrophysics · Physics 2015-06-03 S. M. Lawler , B. Gladman

We use the KOI-13 transiting star-planet system as a test case for the recently developed BEER algorithm (Faigler & Mazeh 2011), aimed at identifying non-transiting low-mass companions by detecting the photometric variability induced by the…

There are more than 5000 confirmed and validated planets beyond the solar system to date, more than half of which were discovered by NASA's Kepler mission. The catalog of Kepler's exoplanet candidates has only been extensively analyzed…

Earth and Planetary Astrophysics · Physics 2024-01-25 Michael R. B. Matesic , Jason F. Rowe , John H. Livingston , Shishir Dholakia , Daniel Jontof-Hutter , Jack J. Lissauer

We report the Transiting Exoplanet Survey Satellite ($TESS$) detection of a multi-planet system orbiting the $V=10.9$ K0 dwarf TOI 125. We find evidence for up to five planets, with varying confidence. Three high signal-to-noise transit…

Earth and Planetary Astrophysics · Physics 2019-10-16 Samuel N. Quinn , Juliette C. Becker , Joseph E. Rodriguez , Sam Hadden , Chelsea X. Huang , Timothy D. Morton , Fred Adams , David Armstrong , Jason D. Eastman , Jonathan Horner , Stephen R. Kane , Jack J. Lissauer , Joseph D. Twicken , Andrew Vanderburg , Rob Wittenmyer , George R. Ricker , Roland K. Vanderspek , David W. Latham , Sara Seager , Joshua N. Winn , Jon M. Jenkins , Eric Agol , Khalid Barkaoui , Charles A. Beichman , François Bouchy , L. G. Bouma , Artem Burdanov , Jennifer Campbell , Roberto Carlino , Scott M. Cartwright , David Charbonneau , Jessie L. Christiansen , David Ciardi , Karen A. Collins , Kevin I. Collins , Dennis M. Conti , Ian J. M. Crossfield , Tansu Daylan , Jason Dittmann , John Doty , Diana Dragomir , Elsa Ducrot , Michael Gillon , Ana Glidden , Robert F. Goeke , Erica J. Gonzales , Krzysztof G. Hełminiak , Elliott P. Horch , Steve B. Howell , Emmanuel Jehin , Eric L. N. Jensen , John F. Kielkopf , Martti H. Kristiansen , Nicholas Law , Andrew W. Mann , Maxime Marmier , Rachel A. Matson , Elisabeth Matthews , Tsevi Mazeh , Mayuko Mori , Felipe Murgas , Catriona Murray , Norio Narita , Louise D. Nielsen , Gaël Ottoni , Enric Palle , Rafał Pawłaszek , Francesco Pepe , Jerome Pitogo de Leon , Francisco J. Pozuelos , Howard M. Relles , Joshua E. Schlieder , Daniel Sebastian , Damien Ségransan , Avi Shporer , Keivan G. Stassun , Motohide Tamura , Andrei Tokovinin , Stéphane Udry , Ian Waite , Carl Ziegler

We describe a new metric that uses machine learning to determine if a periodic signal found in a photometric time series appears to be shaped like the signature of a transiting exoplanet. This metric uses dimensionality reduction and…

The search for technosignatures from hypothetical galactic civilizations is going through a new phase of intense activity. For the first time, a significant fraction of the vast search space is expected to be sampled in the foreseeable…

Instrumentation and Methods for Astrophysics · Physics 2019-03-26 Claudio Grimaldi , Geoffrey W. Marcy

We searched high resolution spectra of 5600 nearby stars for emission lines that are both inconsistent with a natural origin and unresolved spatially, as would be expected from extraterrestrial optical lasers. The spectra were obtained with…

Instrumentation and Methods for Astrophysics · Physics 2017-05-24 Nathaniel K. Tellis , Geoffrey W. Marcy

The radial velocity method plays a major role in the discovery of nearby exoplanets. To efficiently find planet candidates from the data obtained in high precision radial velocity surveys, we apply a signal diagnostic framework to detect…

The Kepler, K2, and Transiting Exoplanet Survey Satellite (TESS) missions have provided a wealth of confirmed exoplanets, benefiting from a huge effort from the planet-hunting and follow-up community. With careful systematics mitigation,…

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