J/A+A/689/A3ivo://CDS.VizieR/J/A+A/689/A3doi:10.26093/cds/vizier.36890003CDSZhang G.-Y.Andre P.Men'shchikov A.Li J.-Z.2024-11-29T20:05:50Z2024-08-27T08:47:06ZCDS support team

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

cds-question@unistra.frinterstellar-mediummolecular-cloudssurface-photometryinfrared-photometryvisible-astronomyphotometryRecent studies suggest that filamentary structures are representative of the initial conditions of star formation in molecular clouds and support a filament paradigm for star formation, potentially accounting for the origin of the stellar initial mass function (IMF). The detailed, local physical properties of molecular filaments remain poorly characterized, however. Using Herschel imaging observations of the California giant molecular cloud, we aim to further investigate the filament paradigm for low- to intermediate-mass star formation and to better understand the exact role of filaments in the origin of stellar masses. Using the multiscale, multiwavelength extraction method getsf, we identify starless cores, protostars, and filaments in the Herschel data set and separate these components from the background cloud contribution to determine accurate core and filament properties. We find that filamentary structures contribute approximately 20% of the overall mass of the California cloud, while dense cores contribute a mere 2% of the total mass. The transverse half-power diameter measured for California molecular filaments has a median undeconvolved value of 0.18pc, consistent within a factor of 2 with the typical ~0.1pc width of nearby filaments from the Herschel Gould Belt survey. A vast majority of identified prestellar cores (~82-90%) are located within ~0.1pc of the spines of supercritical filamentary structures. Both the prestellar core mass function (CMF) and the distribution of filament masses per unit length or filament line mass function (FLMF) are consistent with power- law distributions at the high-mass end, {DELTA}N/{DELTA}logM~=M-1.4+/-0.2 at M>1M_{sun}_ for the CMF and {DELTA}N/{DELTA}logMline~=Mline-1.5+/-0.2 for the FLMF at Mline>10M_{sun}_/pc, which are both consistent with the Salpeter power-law IMF. Based on these results, we propose a revised model for the origin of the CMF in filaments, whereby the global prestellar CMF in a molecular cloud arises from the integration of the CMFs generated by individual thermally supercritical filaments within the cloud. Our findings support the existence a tight connection between the FLMF and the CMF/IMF and suggests that filamentary structures represent a critical evolutionary step in establishing a Salpeter-like mass function.2024A&A...689A...3Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/764/133 : Auriga-California giant molecular cloud (Harvey+, 2013)J/ApJ/786/37 : Auriga-California molecular cloud (Broekhoven-Fiene+, 2014)J/A+A/606/A100 : YSOs in California Molecular Cloud (Lada+, 2017)J/A+A/620/A163 : Cores in California molecular cloud (Zhang+, 2018)J/A+A/642/A76 : California molecular cloud CO datacubes (Zhang+, 2020)J/ApJ/921/23 : C^18^O dense cores identified in the CMC region (Guo+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/689/A3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/689/A3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/689/A3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/689/A3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/689/A3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/689/A3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/689/A3/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A3/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A3/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A3/list?GETtext/xml+votable180.050000true64.87537.818060.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/689/A30/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/689/A3?format=asciiOpticalInfrareddefaultJ/A+A/689/A3/listList of fits filesrecnoRecord 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.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar