J/A+A/675/A205ivo://CDS.VizieR/J/A+A/675/A205doi:10.26093/cds/vizier.36750205CDSChomez A.Lagrange A.-M.Delorme P.Langlois M.Chauvin G.,Flasseur O.Dallant J.Philipot F.Bergeon S.Albert D.Meunier N.,Rubini P.2024-11-28T20:04:12Z2023-07-24T08:45:28ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsphotometryvisible-astronomyDespite tremendous progress in the detection and characterization of extrasolar planetary systems in the last 25 years, we have not pinpointed any Solar System analogues. In particular, Jupiter-like planets (either mature or old) are barely detectable beyond 5 au with indirect techniques and they are still out of the reach of direct imaging techniques.Our study is aimed at a search for exoplanets throughout the whole ESO/VLT-SPHERE archive with an improved and unsupervised data analysis algorithm that could allow us to detect massive giant planets at 5au. To prepare, test, and optimize our approach, we gathered a sample of 24 solar-type stars observed with SPHERE using angular and spectral differential imaging modes. We used PACO, a recently developed new-generation algorithm that has been shown to outperform classical methods. We also improved the SPHERE pre-reduction pipeline and optimized the outputs of PACO to enhance the detection performance. We developed custom-built spectral prior libraries to optimize the detection capability of the ASDI mode for both IRDIS and IFS. Compared to previous works conducted with more classical algorithms, the contrast limits we derived with PACO are more reliable and significantly improved, especially at short angular separations, where a gain by a factor ten has been obtained between 0.2 and 0.5-arcsec. Under good observing conditions, planets down to 5M_jup_, orbiting at 5au could be detected around stars within 60 parsec. We identified two exoplanet candidates that will require a follow-up to test for a common proper motion.2023A&A...675A.205Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/675/A205CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/651/A71 : SHINE II (Langlois+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/675/A205https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/675/A205http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/675/A205https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/675/A205https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/675/A205http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/675/A205GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/675/A205/stars (List of stars with contrast data in table 1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/675/A205/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/675/A205/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/675/A205/stars?GETtext/xml+votable180.050000true282.6853333-31.79647220.0055555555555555566/16393 19509 22146 33312 37414 38936 38950 39044 39735 40717 45927 46383 47205 47598 47626 47863https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/675/A205?format=asciiOpticaldefaultJ/A+A/675/A205/starsList of stars with contrast data in table 1SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainJ/A+A/675/A205/table1Properties of the signals detected in the IRDIS imagesObs.dateObserving nighttime.epochnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS/NSignal to noise ratiostat.snrfloatSepSeparationmaspos.angDistancefloate_SepError on separationmasstat.errorfloatPAPosition angledegpos.posAngfloate_PAError on position angledegstat.errorfloatcontrastH2Contrast relative to the star in the H2 bandphot.mag;arith.diffdoublee_contrastH2Error on contrast relative to the star in the H2 bandstat.errordoublecontrastH3Contrast relative to the star in the H3 bandphot.mag;arith.diffdoublee_contrastH3Error on contrast relative to the star in the H3 bandstat.errordoubleStatusFinal status of the detection (1)meta.codecharNameStar namemeta.id;meta.mainchar