J/ApJ/838/80ivo://CDS.VizieR/J/ApJ/838/80doi:10.26093/cds/vizier.18380080CDSChen Z.Jiang Z.Tamura M.Kwon J.Roman-Lopes A.2018-02-02T08:58:18Z2017-12-06T15:18:32ZCDS support team

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

cds-question@unistra.frinterstellar-mediumpolarimetryinfrared-sourcesWe report the detection of a curved magnetic field in the ring-like shell of the bubble N4, derived from near-infrared polarization of reddened diskless stars located behind this bubble. The magnetic field in the shell is curved and parallel to the ring-like shell, and its strength is estimated to be ~120{mu}G in the plane of the sky. The magnetic field strength in the shell is significantly enhanced compared to the local field strength. We calculate the mass-to-flux ratio for the submillimeter clumps in the shell and find that they are all magnetically subcritical. Our results demonstrate that the magnetic field strengthens as the interstellar medium is compressed into a shell, and suggest that the magnetic field has the potential to hinder star formation triggered by H II region expansion.2017ApJ...838...80Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/838/80CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/58 : A Survey of Radio H II Regions in the Northern Sky (Lockman+ 1989)J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)J/A+A/544/A146 : ATLASGAL cold high-mass clumps with NH_3_ (Wienen+, 2012)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/A+A/565/A75 : ATLASGAL. Dust condensations in Gal. plane (Csengeri+, 2014)J/ApJ/818/95 : YSO candidates within 5' from the IR bubble N4 (Liu+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/838/80https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/838/80http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/838/80https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/838/80https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/838/80http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/838/80GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/838/80/table1 (JHK-band polarimetric data of the background stars behind bubble N4)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/838/80/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/838/80/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/838/80/table1?GETtext/xml+votable180.050000true272.02060111-18.232673060.0055555555555555566/29102https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/838/80?format=asciiInfrareddefaultJ/ApJ/838/80/table1JHK-band polarimetric data of the background stars behind bubble N4recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainPol(H)[0.4/10.3] Polarization degree at H-band%phys.polarizationfloate_Pol(H)[0/1] Error of polarization degree at H-band%stat.errorfloatPA(H)[0/180] Position angle at H-banddegpos.posAng;phys.polarizationinte_PA(H)[0/9] Error of position angle at H-banddegstat.errorintPol(J)[0.6/12]? Polarization degree at J-band%phys.polarizationfloatnullablee_Pol(J)[0.2/0.9]? Pol(J) uncertainty%stat.errorfloatnullablePA(J)[0.7/177]? Position angle at J-banddegpos.posAng;phys.polarizationfloatnullablee_PA(J)[0.5/9]? PA(J) uncertaintydegstat.errorfloatnullablePol(K)[0.3/11.4]? Polarization degree at K-band%phys.polarizationfloatnullablee_Pol(K)[0/0.9]? Pol(K) uncertainty%stat.errorfloatnullablePA(K)[0.9/179]? Position angle at K-banddegpos.posAng;phys.polarizationfloatnullablee_PA(K)[0.1/9.4]? PA(K) uncertaintydegstat.errorfloatnullable