2023ApJ...946...62W

Query : 2023ApJ...946...62W

2023ApJ...946...62W - Astrophys. J., 946, 62 (2023/April-1)

First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation.

WARD-THOMPSON D., KAROLY J., PATTLE K., WHITWORTH A., KIRK J., BERRY D., 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., HAYASHI S., 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., 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 BISTRO Survey 850 μm dust emission polarization observations of the L1495A-B10 region of the Taurus molecular cloud, taken at the James Clerk Maxwell Telescope (JCMT). We observe a roughly triangular network of dense filaments. We detect nine of the dense starless cores embedded within these filaments in polarization, finding that the plane-of-sky orientation of the core-scale magnetic field lies roughly perpendicular to the filaments in almost all cases. We also find that the large-scale magnetic field orientation measured by Planck is not correlated with any of the core or filament structures, except in the case of the lowest-density core. We propose a scenario for early prestellar evolution that is both an extension to, and consistent with, previous models, introducing an additional evolutionary transitional stage between field-dominated and matter-dominated evolution, observed here for the first time. In this scenario, the cloud collapses first to a sheet-like structure. Uniquely, we appear to be seeing this sheet almost face on. The sheet fragments into filaments, which in turn form cores. However, the material must reach a certain critical density before the evolution changes from being field dominated to being matter dominated. We measure the sheet surface density and the magnetic field strength at that transition for the first time and show consistency with an analytical prediction that had previously gone untested for over 50 yr.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Interstellar magnetic fields - Molecular clouds - Starlight polarization - Collapsing clouds - Interstellar filaments

Simbad objects: 16

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Number of rows : 16
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 [WPK2016] S12 cor 04 17 34.84 +28 03 08.9           ~ 2 0
3 Barnard 211 DNe 04 17 35 +27 43.1           ~ 141 0
4 HGBS J041741.9+280846 cor 04 17 41.8 +28 08 47           ~ 13 0
5 HGBS J041743.1+280600 cor 04 17 43.2 +28 05 59           ~ 9 0
6 HGBS J041751.9+281232 cor 04 17 52.0 +28 12 26           ~ 5 0
7 HGBS J041800.2+281112 cor 04 18 00.180 +28 11 12.00           ~ 3 0
8 [WPK2016] S11 cor 04 18 03.08 +28 07 35.2           ~ 2 0
9 LDN 1495 DNe 04 18.1 +27 37           ~ 408 1
10 HGBS J041807.8+280506 cor 04 18 08.4 +28 05 12           ~ 15 0
11 LDN 1495A DNe 04 18.6 +28 25           ~ 39 0
12 V* V892 Tau Ae* 04 18 40.6157618376 +28 19 15.625058880   16.6 14.69 14.35   A0Ve 324 0
13 Barnard 213 DNe 04 20 51 +27 16.3           ~ 249 0
14 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
15 LDN 1689 DNe 16 32 22.5 -24 28 29           ~ 153 0
16 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1

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