Oral Presentation

Resolving the Structure of the Pulsar Wind Nebula in SNR 0540-69.3 with ALMA

Author(s): Po-Sheng Ou (ASIAA/NTU), You-Hua Chu (ASIAA)

Presenter: Po-Sheng Ou (ASIAA/NTU)

SNR 0540-69.3 is the second youngest supernova remnant (SNR) in the Large Magellanic Cloud (LMC) after SN1987A, and it is often called the “twin” of the Crab. The structure of the pulsar wind nebula (PWN) in SNR 0540-69.3 has been uncertain because the X-ray observations do not have enough resolution. The identifications of the jet and torus have been claimed, but highly controversial. Our ALMA observation provides the first high-resolution image in the central region of this PWN. The image shows several bright clumps around the position of the pulsar, and also an extended arc, which are detected for the first time. We compare our ALMA image with Chandra, HST, Spitzer, and ATCA images to clarify the identification of jet and torus, and investigate the physical structure of the PWN. The physical structure of this PWN is then compared with its “twin”, the Crab.