J/A+A/682/A61ivo://CDS.VizieR/J/A+A/682/A61doi:10.26093/cds/vizier.36820061CDSCacciapuoti L.Macias E.Gupta A.Testi L.Miotello A.Espaillat C.,Kuffmeier M.van Terwisga S.Tobin J.Grant S.Manara C.F.,Segura-Cox D.Wendeborn J.Klessen R.S.Maury A.J.Lebreuilly U.,Hennebelle P.Molinari S.2024-11-07T20:01:20Z2024-02-05T09:13:05ZCDS support team

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

cds-question@unistra.frinterstellar-mediuminterferometryradio-sourcesObservations of interstellar material infalling onto star- and planet-forming systems have become increasingly common thanks to recent advancements in radio interferometry. These structures replenish disks with fresh material, have the potential to significantly alter their dynamics, trigger the formation of substructures, induce shocks, and modify their physical and chemical properties. In this study, we combine new ALMA band 3 and archival band 6 observations to characterize the dust content and mass infall rate of a 4000au arc-like structure infalling onto M512, a class I young stellar object located in the Lynds 1641 region of the Orion A molecular cloud. We measure for the first time spectral index maps and derive a dust opacity index profile along a streamer, constraining grain properties and its dust mass. We measure a spectral index {alpha}~3.2 across the entire structure, and a dust opacity index {beta}~1.6. Given grain properties consistent with the measured {beta}, the structure can host up to 245M_{Earth}_ of dust, being comparable or even exceeding the mass of the inner, unresolved 600au, which contains the protoplanetary disk of M512. Such a massive streamer can strongly affect the evolution of the star- and planet-forming inner system. Assuming typical ISM dust-to-gas ratio of 1%, free fall timescales (50kyr) imply total mass infall rates up to 1.5*10^-6^M_{sun}_/yr. M512 has been classified as an outbursting source with multi epoch photometry, thus representing an interesting case study to explore the possible connection between infalling streamers and accretion outbursts.2024A&A...682A..61Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/682/A61CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/144/192 : Spitzer survey of Orion A and B. I. YSO catalog (Megeath+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/682/A61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/682/A61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/682/A61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/682/A61https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/682/A61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/682/A61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/682/A61/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/682/A61/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/682/A61/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/682/A61/list?GETtext/xml+votable180.050000true85.05743-7.537810.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/682/A616/21430https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/682/A61?format=asciiRadiodefaultJ/A+A/682/A61/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableFreqObserved frequencyGHzem.freqdoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar