2020
DOI: 10.1051/0004-6361/201937290
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The search for disks or planetary objects around directly imaged companions: a candidate around DH Tauri B

Abstract: Context. In recent decades, thousands of substellar companions have been discovered with both indirect and direct methods of detection. While the majority of the sample is populated by objects discovered using radial velocity and transit techniques, an increasing number have been directly imaged. These planets and brown dwarfs are extraordinary sources of information that help in rounding out our understanding of planetary systems. Aims. In this paper, we focus our attention on substellar companions detected w… Show more

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Cited by 20 publications
(16 citation statements)
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“…Indeed, only three of the hundreds of known moons in the solar system are found within 2 AU of the Sun. So far, only Lazzoni et al (2020) have published constraints on moons orbiting planets at similar orbital radii to the HR 8799 planets, and their direct imaging constraints only probe moons orbiting far from their host planets. Our constraints are first probes of moons and binary planets in a new parameter space (planet semimajor axis 10 AU and moon orbital period 10 days).…”
Section: Mcmc Radial Velocity Analysismentioning
confidence: 99%
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“…Indeed, only three of the hundreds of known moons in the solar system are found within 2 AU of the Sun. So far, only Lazzoni et al (2020) have published constraints on moons orbiting planets at similar orbital radii to the HR 8799 planets, and their direct imaging constraints only probe moons orbiting far from their host planets. Our constraints are first probes of moons and binary planets in a new parameter space (planet semimajor axis 10 AU and moon orbital period 10 days).…”
Section: Mcmc Radial Velocity Analysismentioning
confidence: 99%
“…However, despite the prevalence of planets in our galaxy and the ubiquity of moons orbiting the planets in our solar system, astronomers have not yet securely detected any exomoons and have only a handful of unconfirmed candidates (e.g. Lazzoni et al 2020;Limbach et al 2021, but see also Kreidberg et al 2019). Given the importance of Earth's moon on our planet's spin dynamics (Li & Batygin 2014) and the potential habitability of icy moons in the outer solar system (e.g.…”
mentioning
confidence: 99%
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“…Many methods have been suggested to search for the moons of planets outside the solar system, which are often called "exomoons." As reviewed by Heller (2018), about a dozen signals possibly attributable to exomoons have been described in the literature based on gravitational microlensing (Bennett et al 2014;Miyazaki et al 2018), signatures in transit spectra (Oza et al 2019;Gebek & Oza 2020), gaps in circumplanetary rings (Kenworthy & Mamajek 2015), transit-timing variations (TTVs) accompanied by exomoon transits of the host star (Rodenbeck et al 2018;Teachey et al , 2020Kreidberg et al 2019), TTVs (Fox & Wiegert 2020;Kipping 2020), direct imaging (Lazzoni et al 2020), and absorption by gas possibly associated with an orbiting moon (Ben-Jaffel & Ballester 2014). Follow-up, confirmation, and further characterization of these exomoon candidates have proven difficult, making it important to devise more methods for detecting exomoons.…”
Section: Introductionmentioning
confidence: 99%
“…This includes looking for exomoons via direct imaging, radial velocity monitoring, astrometric variations, and transits. Earlier authors considered applying these methods to directly imaged exoplanets orbiting stars (Cabrera & Schneider 2007;Agol et al 2015;Heller 2016;Vanderburg et al 2018;Lazzoni et al 2020), but for IPMOs, the observational requirements are more easily met because high-contrast imaging is unnecessary to detect the IPMO. Indeed, the gravitational-lensing technique has already been used to identify a signal (MOA-2011-BLG-262Lb) that could have arisen from an exomoon orbiting an IPMO, although the data do not strongly rule out the possibility that the signal is from a planet orbiting a low-mass star (Bennett et al 2014).…”
Section: Introductionmentioning
confidence: 99%