2023ApJ...952...29K

Query : 2023ApJ...952...29K

2023ApJ...952...29K - Astrophys. J., 952, 29 (2023/July-3)

The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43.

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

Abstract (from CDS):

We present observations of polarized dust emission at 850 μm from the L43 molecular cloud, which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part of the BISTRO large program. L43 is a dense ( ${N}_{{{\rm{H}}}_{2}}\sim {10}^{22}$ -10²³ cm^–2) complex molecular cloud with a submillimeter-bright starless core and two protostellar sources. There appears to be an evolutionary gradient along the isolated filament that L43 is embedded within, with the most evolved source closest to the Sco OB2 association. One of the protostars drives a CO outflow that has created a cavity to the southeast. We see a magnetic field that appears to be aligned with the cavity walls of the outflow, suggesting interaction with the outflow. We also find a magnetic field strength of up to ∼160 ± 30 μG in the main starless core and up to ∼90 ± 40 μG in the more diffuse, extended region. These field strengths give magnetically super- and subcritical values, respectively, and both are found to be roughly trans-Alfvénic. We also present a new method of data reduction for these denser but fainter objects like starless cores.

Journal keyword(s): Stellar-interstellar interactions - Interstellar magnetic fields - Young stellar objects - Dust continuum emission - Starlight polarization - Molecular clouds

Simbad objects: 7

Full paper

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Number of rows : 7

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag V	Sp type	#ref 1850 - 2026	#notes
1	NAME Upper Sco-Cen	As*	16 15	-24.2		~	1497	1
2	NAME Ophiuchus Molecular Cloud	SFR	16 28 06	-24 32.5		~	3969	1
3	LDN 1689	DNe	16 32 22.5	-24 28 29		~	153	0
4	V* V1003 Oph	TT*	16 34 09.1696133088	-15 48 16.776092124	13.44	G5	105	0
5	LDN 43	DNe	16 34 29.3	-15 47 11		~	147	1
6	HBC 650	TT*	16 34 29.32	-15 47 01.4		K3.0	184	2
7	LDN 1689B	DNe	16 34 42.1	-24 36 11		~	181	0

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