Astrophys. J., 867, 7-7 (2018/November-1)
Molecular clouds associated with the Type Ia SNR N103B in the Large Magellanic Cloud.
SANO H., YAMANE Y., TOKUDA K., FUJII K., TSUGE K., NAGAYA T., YOSHIIKE S., FILIPOVIC M.D., ALSABERI R.Z.E., BARNES L., ONISHI T., KAWAMURA A., MINAMIDANI T., MIZUNO N., YAMAMOTO H., TACHIHARA K., MAXTED N., VOISIN F., ROWELL G., YAMAGUCHI H. and FUKUI Y.
Abstract (from CDS):
N103B is a Type Ia supernova remnant (SNR) in the Large Magellanic Cloud (LMC). We carried out new 12CO(J = 3-2) and 12CO(J = 1-0) observations using ASTE and ALMA. We have confirmed the existence of a giant molecular cloud at VLSR ∼ 245 km s–1 toward the southeast of the SNR using ASTE 12CO(J = 3-2) data at an angular resolution of ∼25'' (∼6 pc in the LMC). Using the ALMA 12CO(J = 1-0) data, we have spatially resolved CO clouds along the southeastern edge of the SNR with an angular resolution of ∼1.''8 (∼0.4 pc in the LMC). The molecular clouds show an expanding gas motion in the position-velocity diagram with an expansion velocity of ∼5 km s–1. The spatial extent of the expanding shell is roughly similar to that of the SNR. We also find tiny molecular clumps in the directions of optical nebula knots. We present a possible scenario that N103B exploded in the wind-bubble formed by the accretion winds from the progenitor system, and is now interacting with the dense gas wall. This is consistent with a single-degenerate scenario.
© 2018. The American Astronomical Society. All rights reserved.
ISM: clouds - ISM: individual objects: N103B, SNR 0509-68.7 - ISM: molecules - ISM: supernova remnants
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