J/MNRAS/513/2039ivo://CDS.VizieR/J/MNRAS/513/2039doi:10.26093/cds/vizier.75132039CDSSaha P.Soam A.Baug T.Gopinathan M.Mondal S.Ghosh T.2025-03-07T20:14:34Z2025-02-25T10:32:54ZCDS support team

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

cds-question@unistra.frmilky-way-galaxymagnetic-fieldsmolecular-cloudsyoung-stellar-objectso-starsinterstellar-mediumpolarimetryastrometryThe Lynds' Dark Nebula (LDN) 1615/1616 and CB 28 (hereafter L1616) together form a cometary globule located at an angular distance of about 8{deg} west of the Orion OB1 association, aligned roughly along the east-west direction, and showing a distinct head-tail structure. The presence of massive stars in the Orion belt has been considered to be responsible for the radiation-driven implosion mode of star formation in L1616. Based on the latest Gaia Early Data Release 3 (EDR3) measurements of the previously known young stellar objects (YSOs) associated with L1616, we find the distance to this cloud to be 384 +/- 5 pc. We present optical polarimetry towards L1616 that maps the plane-of-sky component of the ambient magnetic field (BPOS) geometry. Based on the proper motion of the YSOs associated with L1616, we investigate their plane-of-sky motion relative to the exciting star {epsilon} Ori. Using the Gaia EDR3 measurements of the distances and proper motions of the YSOs, we find two additional sources comoving with the known YSOs. One comoving source is HD 33056, a B9 star, and the other might be a young pre-main-sequence star not reported in previous studies. The mean direction of BPOS is found to follow the cloud structure. This could be the effect of dragging of the magnetic field lines by the impact of the ionizing radiation from {epsilon} Ori. Based on the pressure exerted on L1616, and the ages of the associated YSOs, we show that it could possibly be the main source of ionization in L1616, and thus the star formation in it.2022MNRAS.513.2039Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/513/2039CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/A+A/655/A76 : L1172/1174 R-band polarimetric results (Saha+, 2021)I/352 : Distances to 1.47 billion stars in Gaia EDR3J/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/513/2039https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/513/2039http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/513/2039https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/513/2039https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/513/2039http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/513/2039GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/513/2039/tablea2 (Foreground-corrected optical polarimetric results of 195 stars located at the background of LDN 1616)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/513/2039/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/513/2039/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/513/2039/tablea2?GETtext/xml+votable180.050000true75.89132694-3.576771110.0055555555555555565/5707 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/513/2039?format=asciidefaultJ/MNRAS/513/2039/tablea2Foreground-corrected optical polarimetric results of 195 stars located at the background of LDN 1616IDIdentifier number (Star_ID)meta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaEDR3Display the GaiaEDR3 data Cat. I/350meta.ref.urlcharRA_ICRSBarycentric right ascension of the source (ICRS) at Ep=2016.0 (RA)degpos.eq.ra;meta.mainDE_ICRSBarycentric declination of the source (ICRS) at Ep=2016.0 (Dec.)degpos.eq.dec;meta.mainPPolarization fraction (P)%phys.polarizationfloate_PUncertainty in the measurement of P ({Delta}P)%stat.errorfloatPAPosition angle of the polarization planedegpos.posAnginte_PAUncertainty in the measurement of PA ({Delta}PA)degstat.errorint