New Views of the Magellanic Clouds fA U Symposium, Vol. 190, 1999 Y.-H. Chu, N.B. Suntzeff, J.E. Hesser, and D.A. Bohlender, eds. Molecular Clouds in the LMC Observed with NANTEN: IV. Comparison with SNRs H. Saito, R. Abe, A. Hara, T. Hayakawa, S. Kato, A. Kawamura, A. Mizuno, N. Mizuno, H. Ogawa, T. Onishi, K. Tachihara, K. C. Xiao, N. Yamaguchi, R. Yamaguchi, and Y. Fukui Department of Astrophysics, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan Y. Yonekura Earth and Life Sciences, Osaka Prefecture University, Gakuencho 1-1, Sakai, Osaka 599-8531, Japan Abstract. We have made 12CO(J=I-0) observations of the LMC with NANTEN. We report the results of a comparison between CO clouds and SNRs in the LMC. Among the 35 known SNRs, only 10 are possibly associated with CO clouds. These 10 CO clouds and SNRs deserve follow- up studies for possible interactions. We present overlays of CO clouds on the optical images of some of these SNRs. 1. Introduction The interaction of supernova remnants (SNRs) with dense molecular clouds is an important subject in astrophysics. Molecular clouds swept up by supernova blast waves provide an important laboratory in which the physical processes associated with shocks can be studied. The LMC is well suited for the study of SNR and molecular cloud interactions. Thirty-five SNRs have been identified in the LMC from X-ray, optical, and radio continuum observations (Mathewson et al. 1983, 1984, 1985; Smith et al. 1994). We have made a survey for giant molecular clouds in the LMC in the 12CO(J=I-0) emission, using the NANTEN 4-meter millimeter wave telescope at Las Campanas Observatory in Chile. The survey covered 6 X 6 square degrees with a 2' grid spacing. We have identified rvl00 distinct clouds. The results of these observations are presented by Fukui et al. (1999). In this contribution, we report the results of a comparison between the CO clouds and the SNRs. 2. Comparison and Results The sizes of the cataloged SNRs range from a few pc to rvl00 pc, and their ages are 10 2-106 yrs. We carried out a comparison between the 35 SNRs and the 100 giant molecular clouds. We define: (1) "SNR with CO cloud" - SNRs associated with molecular clouds; the SNR is superposed on a CO cloud or in the immediate neighborhood of a CO cloud; see Fig. la; and (2) "SNR near CO 148 use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S007418090011770X Downloaded from https://www.cambridge.org/core. IP address: 173.232.7.137, on 12 Jun 2019 at 11:47:30, subject to the Cambridge Core terms of