2022ApJ...926..163K

Query : 2022ApJ...926..163K

2022ApJ...926..163K - Astrophys. J., 926, 163 (2022/February-3)

B-fields in Star-forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main.

KWON W., PATTLE K., SADAVOY S., HULL C.L.H., JOHNSTONE D., WARD-THOMPSON D., DI FRANCESCO J., KOCH P.M., FURUYA R., DOI Y., LE GOUELLEC V.J.M., HWANG J., LYO A.-R., SOAM A., TANG X., HOANG T., KIRCHSCHLAGER F., ESWARAIAH C., FANCIULLO L., KIM K.H., ONAKA T., KONYVES V., KANG J.-H., LEE C.W., TAMURA M., BASTIEN P., HASEGAWA T., LAI S.-P., QIU K., BERRY D., ARZOUMANIAN D., BOURKE T.L., BYUN D.-Y., CHEN W.P., CHEN H.-R.V., CHEN M., CHEN Z., CHING T.-C., CHO J., CHOI Y., CHOI M., CHRYSOSTOMOU A., CHUNG E.J., COUDE S., DAI S., DIEP P.N., DUAN Y., DUAN H.-Y., EDEN D., FIEGE J., FISSEL L.M., FRANZMANN E., FRIBERG P., FRIESEN R., FULLER G., GLEDHILL T., GRAVES S., GREAVES J., GRIFFIN M., GU Q., HAN I., HATCHELL J., HAYASHI S., HOUDE M., INOUE T., INUTSUKA S.-I., IWASAKI K., JEONG I.-G., KANG M., KAROLY J., KATAOKA A., KAWABATA K., KEMPER F., KIM K.-T., KIM G., KIM M.-R., KIM S., KIM J., KIRK J., KOBAYASHI M.I.N., KUSUNE T., KWON J., LACAILLE K., LAW C.-Y., LEE C.-F., LEE Y.-H., LEE H., LEE J.-E., LEE S.-S., LI D., LI D., LI H.-B., LIN S.-J., LIU S.-Y., LIU H.-L., LIU J., LIU T., LU X., MAIRS S., MATSUMURA M., MATTHEWS B., MORIARTY-SCHIEVEN G., NAGATA T., NAKAMURA F., NAKANISHI H., NGOC N.B., OHASHI N., PARK G., PARSONS H., PERETTO N., PRIESTLEY F., PYO T.-S., QIAN L., RAO R., RAWLINGS J., RAWLINGS M.G., RETTER B., RICHER J., RIGBY A., SAITO H., SAVINI G., SETA M., SHIMAJIRI Y., SHINNAGA H., TAHANI M., TANG Y.-W., TOMISAKA K., TRAM L.N., TSUKAMOTO Y., VITI S., WANG H., WANG J.-W., WHITWORTH A., WU J., XIE J., YEN H.-W., YOO H., YUAN J., YUN H.-S., ZENKO T., ZHANG Y., ZHANG C.-P., ZHANG G., ZHOU J., ZHU L., DE LOOZE I., ANDRE P., DOWELL C.D., EYRES S., FALLE S., ROBITAILLE J.-F. and VAN LOO S.

Abstract (from CDS):

We present 850 µm polarimetric observations toward the Serpens Main molecular cloud obtained using the POL-2 polarimeter on the James Clerk Maxwell Telescope as part of the B-fields In STar-forming Region Observations survey. These observations probe the magnetic field morphology of the Serpens Main molecular cloud on about 6000 au scales, which consists of cores and six filaments with different physical properties such as density and star formation activity. Using the histogram of relative orientation (HRO) technique, we find that magnetic fields are parallel to filaments in less-dense filamentary structures where {N}{{H}{2}}\lt 0.93×{10}^{22} cm–2 (magnetic fields perpendicular to density gradients), while they are perpendicular to filaments (magnetic fields parallel to density gradients) in dense filamentary structures with star formation activity. Moreover, applying the HRO technique to denser core regions, we find that magnetic field orientations change to become perpendicular to density gradients again at {N}{{H}{2}}~4.6×{10}^{22} cm–2. This can be interpreted as a signature of core formation. At {N}{{H}{2}}~16×{10}^{22} cm–2, magnetic fields change back to being parallel to density gradients once again, which can be understood to be due to magnetic fields being dragged in by infalling material. In addition, we estimate the magnetic field strengths of the filaments (B POS = 60-300 µG)) using the Davis-Chandrasekhar-Fermi method and discuss whether the filaments are gravitationally unstable based on magnetic field and turbulence energy densities.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Polarimetry - Interstellar magnetic fields - Molecular clouds - Submillimeter astronomy - Interstellar medium - Interstellar filaments

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
2 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 350 0
3 NAME Auriga reg 04 20 00.0 +38 05 00           ~ 238 0
4 Barnard 213 DNe 04 20 51 +27 16.3           ~ 249 0
5 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
6 NAME NGC 2071 IR SFR 05 47 04.4 +00 21 49           ~ 75 0
7 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
8 LDN 1689 DNe 16 32 22.5 -24 28 29           ~ 153 0
9 NAME Serpens Main Cloud MoC 18 29.2 +00 36           ~ 39 0
10 NAME Serpens South molecular cloud MoC 18 30 -02.0           ~ 116 0
11 RAFGL 5541 Y*O 18 52 50.26 +00 55 29.6           ~ 122 1
12 IC 5146 OpC 21 53 29.3 +47 14 46           ~ 507 2

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