J/AJ/159/18ivo://CDS.VizieR/J/AJ/159/18doi:10.26093/cds/vizier.51590018CDSBrande J.Barclay T.Schlieder J.E.Lopez E.D.Quintana E.V.2020-08-20T06:53:45Z2020-02-27T13:42:35ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frexoplanetsdwarf-starsm-starsinfrared-sourcesastronomical-modelsThe upcoming launch of the James Webb Space Telescope (JWST) will dramatically increase our understanding of exoplanets, particularly through direct imaging. Microlensing and radial velocity surveys indicate that some M dwarfs host long-period giant planets. Some of these planets will likely be just a few parsecs away and a few astronomical units from their host stars, a parameter space that cannot be probed by existing high-contrast imagers. We studied whether the coronagraphs on the Mid-infrared Instrument on JWST can detect Jovian-type planets around nearby M dwarfs. For a sample of 27 very nearby M dwarfs, we simulated a sample of Saturn-Jupiter-mass planets with three atmospheric configurations and three orbital separations, observed in three different filters. We found that the f1550c 15.5 {mu}m filter is best suited for detecting Jupiter-like planets. Jupiter-like planets with patchy cloud cover, 2 au from their star, are detectable at 15.5 {mu}m around 14 stars in our sample, while Jupiters with clearer atmospheres are detectable around all stars in the sample. Saturns were most detectable at 10.65 and 11.4 {mu}m (f1065c and f1140c filters), but only with cloud-free atmospheres and within 3 pc (six stars). Surveying all 27 stars would take <170 hr of JWST integration time, or just a few hours for a shorter survey of the most favorable targets. There is one potentially detectable known planet in our sample: GJ 832 b. Observations aimed at detecting this planet should occur in 2024-2026, when the planet is maximally separated from the star.2020AJ....159...18Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/159/18CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/407/2269 : Polarisation of a sample of late M dwarfs (Morin+, 2010)J/AJ/147/94 : Solar neighborhood. XXXII. L and M dwarfs (Dieterich+, 2014)J/ApJ/807/45 : Potentially habitable planets orbiting M dwarfshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/159/18https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/159/18http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/159/18https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/159/18https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/159/18http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/159/18GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/159/18/table2 (Stellar targets used as simulated exoplanet hosts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/159/18/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/159/18/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/159/18/table2?GETtext/xml+votable180.050000true217.4289381-62.67949190.0055555555555555566/250 4444 5000 5420 11636 13688 16391 16758 17348 18496 22309 26699 26972 27462 28955 30505 30771 30833 31781 34181 34448 34535 37332 41591 42290 46566 46632https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/159/18?format=asciiInfrareddefaultJ/AJ/159/18/table2Stellar targets used as simulated exoplanet hostsSimbadNameSimbad column added by the CDSmeta.idcharStarHost starmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTypeSpectral typesrc.spTypecharTemp[2040/3722] TemperatureKphys.temperatureintn_Temp[a] Note on Temp (1)meta.notecharVmag[7.34/18.69] V band magnitudemagphot.mag;em.opt.VfloatJmag[4.2/10.725] J band magnitudemagphot.mag;em.IR.JfloatMass[0.07/0.5] Stellar masssolMassphys.massfloatRad[0.1/0.492] Stellar radiussolRadphys.size.radiusfloatn_Rad[a] Note on Rad (1)meta.notecharDist[1.29/6.4] Distancepcpos.distancefloatRefReferences (2)meta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/159/18/table4Planet S/N at maximum star exposure (6.24 hr), for planets placed around Proxima CentaurirecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarHost starmeta.id.parentcharFilterMIRI coronagraphic filter (1)meta.id;instr.filtercharPlanetPlanet used as simulated exo-targetmeta.id;meta.maincharAtmoAtmospheric configuration, cloud covermeta.notecharSMA[1/5] Orbit semimajor axisAUphys.size.smajAxisintSep1[0.16/3.88] Angular separationarcsecpos.angDistancefloatSep2[0.32/11.75] Angular separation (2)pos.angDistancefloatS/N[0/453.29] Signal-to-noise ratio for observationstat.snrfloatExpTime[898.8/22470] JWST total exposure timestime.duration;obs.exposurefloat