哈勃太空望远镜对红色瞬变V4332人马座的成像
Hubble Space Telescope Imaging of the Site of the Red Transient V4332 Sagittarii
摘要：
V4332 Sgr是一个在1994年爆发的红色光学瞬变。它通常被认为是由于类似于V838 Mon和V1309 Sco的恒星合并。我在2014年获得了HST网站的光学图像。这些图像分辨出尘埃喷出物，尺寸约为0.53 x 0.42角秒;如果喷出物是在1994年发射的，这些图像与预期大致一致。光学星云的大小和形态与最近的ALMA和SMA CO发射图中所见的相似。V4332 Sgr的Gaia DR 2视差具有很大的不确定性。然而，我指出了V4332 Sgr以南10角秒处的一颗12等恒星，它的DR 2自行和径向速度与瞬变相似;它的距离是1.63 kpc。如果V4332 Sgr是这颗恒星的伴星，那么它的绝对视星等最大值只有-3.6等。
英文摘要：
V4332 Sgr is a red optical transient that erupted in 1994. It is generally considered to have been due to a stellar merger similar to V838 Mon and V1309 Sco. I obtained optical images of the site with HST in 2014. The images resolve the dusty ejecta, with dimensions of about 0.53 x 0.42 arcsec; these are approximately consistent with expectation if the ejecta were launched in 1994. The size and morphology of the optical nebula are similar to those seen in recent ALMA and SMA maps of CO emission. The Gaia DR2 parallax of V4332 Sgr has a large uncertainty. However, I point out a 12th-mag star 10 arcsec south of V4332 Sgr that has a DR2 proper motion and radial velocity similar to those of the transient; its distance is 1.63 kpc. If V4332 Sgr is a physical companion of this star, its absolute visual magnitude at maximum was only -3.6.
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