2023ApJ...952L...2L

Query : 2023ApJ...952L...2L

2023ApJ...952L...2L - Astrophys. J., 952, L2 (2023/July-3)

ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Forming Quadruple System with Continuum “Ribbons” and Intricate Outflows.

LUO Q.-Y., LIU T., LEE A.T., OFFNER S.S.R., DI FRANCESCO J., JOHNSTONE D., JUVELA M., GOLDSMITH P.F., QIN S.-L., MAI X., LIU X.-C., SANHUEZA P., XU F.-W., TATEMATSU K., DUTTA S., CHEN H.-R.V., LI S., YANG A., LIU S.-Y., LEE C.-F., HIRANO N., LEE C.W., SAHU D., SHANG H., HSU S.-Y., BRONFMAN L., KWON W., RAWLINGS M.G., EDEN D., LU X., GU Q.-L., REN Z., WARD-THOMPSON D. and SHEN Z.-Q.

Abstract (from CDS):

One of the most poorly understood aspects of low-mass star formation is how multiple-star systems are formed. Here we present the results of Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 observations toward a forming quadruple protostellar system, G206.93-16.61E2, in the Orion B molecular cloud. ALMA 1.3 mm continuum emission reveals four compact objects, of which two are Class I young stellar objects and the other two are likely in prestellar phase. The 1.3 mm continuum emission also shows three asymmetric ribbon-like structures that are connected to the four objects, with lengths ranging from ∼500 to ∼2200 au. By comparing our data with magnetohydrodynamic simulations, we suggest that these ribbons trace accretion flows and also function as gas bridges connecting the member protostars. Additionally, ALMA CO J = 2-1 line emission reveals a complicated molecular outflow associated with G206.93-16.61E2, with arc-like structures suggestive of an outflow cavity viewed pole-on.

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

Journal keyword(s): Star formation - Star forming regions - Multiple stars - Interstellar medium - Protostars

Simbad objects: 11

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Number of rows : 11
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 LDN 1471 DNe 03 48.0 +32 54           ~ 349 0
2 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
3 [DLL2020] G206.93-16.61E2 B cor 05 41 37.040 -02 17 17.99           ~ 4 0
4 [DLL2020] G206.93-16.61E2 D cor 05 41 37.150 -02 17 16.52           ~ 3 0
5 2MASS J05413704-0217178 Y*O 05 41 37.17 -02 17 17.0           ~ 22 0
6 [DLL2020] G206.93-16.61E2 A cor 05 41 37.190 -02 17 17.34           ~ 5 0
7 [DLL2020] G206.93-16.61E2 C cor 05 41 37.200 -02 17 15.97           ~ 3 0
8 [YLL2018] G206.93-16.61E2 Y*O 05 41 37.320 -02 17 16.29           ~ 4 0
9 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 657 1
10 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
11 V* DK Cha TT* 12 53 17.2111480272 -77 07 10.736046012           F0e 149 0

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