J/ApJ/869/L41ivo://CDS.VizieR/J/ApJ/869/L41doi:10.26093/cds/vizier.18699041CDSAndrews S.M.Huang J.Perez L.M.Isella A.Dullemond C.P.,Kurtovic N.T.Guzman V.V.Carpenter J.M.Wilner D.J.Zhang S.Zhu Z.,Birnstiel T.Bai X.-N.Benisty M.Hughes A.M.Oberg K.I.Ricci L.2020-08-19T13:50:06Z2020-02-03T13:47:34ZCDS support team

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

cds-question@unistra.frmillimeter-astronomysubmillimeter-astronomystellar-massesstellar-agesyoung-stellar-objectsstellar-distancesurveysWe introduce the Disk Substructures at High Angular Resolution Project (DSHARP), one of the initial large programs conducted with the Atacama Large Millimeter/submillimeter Array (ALMA). The primary goal of DSHARP is to find and characterize substructures in the spatial distributions of solid particles for a sample of 20 nearby protoplanetary disks, using very high resolution (~0.035", or 5au, Full width half maximum (FWHM)) observations of their 240GHz (1.25mm) continuum emission. These data provide a first homogeneous look at the small-scale features in disks that are directly relevant to the planet formation process, quantifying their prevalence, morphologies, spatial scales, spacings, symmetry, and amplitudes, for targets with a variety of disk and stellar host properties. We find that these substructures are ubiquitous in this sample of large, bright disks. They are most frequently manifested as concentric, narrow emission rings and depleted gaps, although large-scale spiral patterns and small arc-shaped azimuthal asymmetries are also present in some cases. These substructures are found at a wide range of disk radii (from a few astronomical units to more than 100au), are usually compact (<=10au), and show a wide range of amplitudes (brightness contrasts). Here we discuss the motivation for the project, describe the survey design and the sample properties, detail the observations and data calibration, highlight some basic results, and provide a general overview of the key conclusions that are presented in more detail in a series of accompanying articles.2018ApJ...869L..41Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/869/L41CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/216/44 : Walraven photometry in Sco-Cen association (De Geus+, 1989)J/A+A/379/564 : V-type & PMS stars UBVRI photo-polarimetry (Oudmaijer+ 2001)J/AJ/130/1733 : Optical spectroscopy of {rho} Oph stars (Wilking+, 2005)J/A+A/447/609 : 1.2mm continuum observations in rho Oph cloud (Stanke+, 2006)J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)J/A+A/461/183 : Variability of classical T Tauri (Grankin+, 2007)J/ApJ/671/1800 : SCUBA observations of {rho} Oph cloud (Andrews+, 2007)J/ApJS/177/551 : Spitzer c2d survey of Lupus dark clouds (Merin+, 2008)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJ/734/98 : DISCS. II. Southern sky disk data (Oberg+, 2011)J/ApJ/751/115 : Millimeter emission from Taurus binary systems (Harris+,2012)J/ApJ/758/31 : IR photometry for members of Upper Sco (Luhman+, 2012)J/ApJ/769/21 : Accretion luminosities young stars Pf{beta} (Salyk+, 2013)J/ApJ/771/129 : Submillimetric Class II sources of Taurus (Andrews+, 2013)J/ApJ/773/168 : Submm fluxes of very low-mass stars and BDs (Mohanty+, 2013)J/A+A/578/L6 : Polarized images of MWC758 (Benisty+, 2015)J/MNRAS/453/976 : Herbig Ae/Be X-shooter observations (Fairlamb+, 2015)J/ApJ/820/83 : ALMA galaxy properties COSMOS survey field (Scoville+,2016)J/ApJ/827/142 : ALMA observations of GKM stars in Upper Sco (Barenfeld+,2016)J/ApJ/828/46 : ALMA survey of Lupus protoplanetary disks. I. (Ansdell+,2016)J/A+A/600/A20 : Lupus YSOs X-shooter spectroscopy (Alcala+, 2017)J/ApJ/847/31 : Protoplanetary disk data in Cha I and Lupus (Mulders+, 2017)J/ApJ/845/44 : 340GHz SMA obs. nearby protoplanetary disks (Tripathi+,2017)J/ApJ/849/63 : FIR-mm data of YSOs in star-forming regions (Ribas+, 2017)J/A+A/610/A24 : AS 209 ALMA image (Fedele+, 2018)J/AJ/156/76 : New young stars and brown dwarfs in Upper Sco (Luhman+, 2018)J/ApJ/859/21 : ALMA survey Lupus protoplanetary disks. II. (Ansdell+, 2018)J/ApJ/860/124 : ALMA continuum emission obs. of MWC 758 disk (Dong+, 2018)http://almascience.org/alma-data/lp/DSHARP/ : Disk Substructures at Highhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/869/L41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/869/L41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/869/L41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/869/L41https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/869/L41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/869/L41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/869/L41/table1 (The Disk Substructures at High Angular Resolution Project (DSHARP) sample: host star properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/869/L41/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/869/L41/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/869/L41/table1?GETtext/xml+votable180.050000true236.3036125-34.29184640.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJ/869/L416/28921 30741 42598 42614 42704 42736 42737 42981 42992 44317 44362 44379https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/869/L41?format=asciiMillimeterdefaultJ/ApJ/869/L41/table1The Disk Substructures at High Angular Resolution Project (DSHARP) sample: host star propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget namemeta.id;meta.maincharprimaryf_NameFlag on name (1)meta.codecharRegionAssociated star-forming region (2)meta.idchar2MASS2MASS name (JHHMMSSss+DDMMSSs)meta.idcharDist[101/165] Distance (computed from the Gaia DR2 parallaxes)pcpos.distance;pos.heliocentricinte_Dist[2/10] Minimal error on distancepcstat.errorintE_Dist[19]? Maximal error on distance, only if different from minimal errorpcstat.error;stat.maxintnullableSpTSpectral type from the literaturesrc.spTypecharRefReferences (4)meta.refcharlogTeff[3.5/4] Effective temperatures from the literaturelog(K)phys.temperaturefloate_logTeff[0.01/0.03] Error on logTefflog(K)stat.error;phys.temperature.effectivefloatlogL[-0.7/1.3] Stellar luminosities from the literature, scaled according to the appropriate distancelog(solLum)phys.luminosityfloate_logL[0.1/0.3] Error on logLlog(solLum)stat.errorfloatlogM[0/0.8] Stellar masseslog(solMass)phys.massfloate_logM[0.01/0.19] Minimal error on logMlog(solMass)stat.errorfloatE_logM[0.03/0.2] Maximal error on logMlog(solMass)stat.error;stat.maxfloatl_logAge? Limite flag on logAgemeta.code.error;time.agecharlogAgeStellar age (logt_*_)log(yr)time.agechare_logAge[0.3/0.8]? Minimal error on agelog(yr)stat.error;time.agefloatnullableE_logAge[0.1/0.6]? Maximal error on age, only if different from minimal errorlog(yr)stat.error;stat.maxfloatnullablel_logdM/dt? Limit flag on logdM/dtmeta.code.errorcharlogdM/dtAccretion rates, inferred from (properly scaled) accretion luminosities (3)log(solMass.yr**-1)phys.mass.losschare_logdM/dt[0.3/0.5]? Error on logdM/dtlog(solMass.yr**-1)stat.errorfloatnullableCOImgAssociated Data web pagemeta.ref.urlcharContImgAssociated Data web pagemeta.ref.urlcharNobsNumber of ALMA observations for this star (link to Table 2)meta.numberintnullableNarchNumber of ALMA archival observations for this star (link to Table 3)meta.numberintnullableCODownload the FITS file (12CO image)meta.ref.urlcharContDownload the FITS file (240GHz continuum image)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_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/ApJ/869/L41/table2DSHARP observing log (ALMA Program 2016.1.00484.L)CalCalibrators (1)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget Namemeta.id;meta.maincharobsUTC date at the start of the observationsstime.epochnullableConfigALMA configurationinstr.setupcharBmin[15/139] Minimum baseline lengthminstr.baseline;stat.minintBmax[1.1/16.2] Maximum baseline lengthkminstr.baselinefloatNant[39/51] Number of antennas availablemeta.numberintEmin[27/79] Minimum target elevation range ({epsilon})degstat.fit.paramintEmax[39/87] Maximum target elevation range ({epsilon})degstat.fit.paramintPWVmin[0.3/1.5] Minimum range of precipitable water vapor levelsmmstat.fit.paramfloatPWVmax[0.4/1.9] Maximum range of precipitable water vapor levelsmmstat.fit.paramfloatJ/ApJ/869/L41/table3Archival ALMA data sets used by DSHARPProgALMA program IDmeta.id;obscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget Namemeta.id;meta.maincharobsUTC date at the start of the observationsstime.epochnullableConfigALMA configurationinstr.setupcharBmin[15/43] Minimum baseline lengthminstr.baseline;stat.minintBmax[349/3144] Maximum baseline lengthminstr.baseline;stat.maxintNant[15/44] Number of antennas availablemeta.numberintCal? Calibrators (1)meta.idcharRef? Original references for these data sets (2)meta.refintnullable