%0 Journal Article
%T SiO maser astrometry of the red transient V838 Monocerotis
%A Andreas Brunthaler
%A Gisela N. Ortiz-Le¨®n
%A Karl M. Menten
%A Mark J. Reid
%A Romuald Tylenda
%A Tomasz Kami¨½ski
%J -
%D 2020
%R 10.1051/0004-6361/202037712
%X We present multiepoch observations with the Very Long Baseline Array of SiO maser emission in the <i>v<i/>£¿=£¿1, <i>J<i/>£¿=£¿1£¿0 transition at 43 GHz from the remnant of the red nova V838 Mon. We modeled the positions of maser spots to derive a parallax of 0.166£¿¡À£¿0.060 mas. Combining this parallax with other distance information results in a distance of 5.6£¿¡À£¿0.5 kpc, which is in agreement with an independent geometric distance of 6.1£¿¡À£¿0.6 kpc from modeling polarimetry images of V838 Mon¡¯s light echo. Combining these results, and including a weakly constraining <i>Gaia<i/> parallax, yields a best estimate of distance of 5.9£¿¡À£¿0.4 kpc. The maser spots are located close to the peaks of continuum at ¡«225 GHz and SiO <i>J<i/>£¿£¿=£¿£¿5£¿4 thermal emission detected with the Atacama Large (sub)Millimeter Array. The proper motion of V838 Mon confirms its membership in a small open cluster in the Outer spiral arm of the Milky Way
%U https://www.aanda.org/articles/aa/full_html/2020/06/aa37712-20/aa37712-20.html