Astrometry of H2_{2}O Masers in Nearby Star-Forming Regions with VERA --- IV. L1448C

Jul, 2010
15 pages
Published in:
  • Publ.Astron.Soc.Jap. 63 (2011) 1
e-Print:

Citations per year

20112013201520172018024681012
Abstract: (arXiv)
We have carried out multi-epoch VLBI observations with VERA (VLBI Exploration of Radio Astrometry) of the 22~GHz H2_{2}O masers associated with a Class 0 protostar L1448C in the Perseus molecular cloud. The maser features trace the base of collimated bipolar jet driven by one of the infrared counter parts of L1448C named as L1448C(N) or L1448-mm A. We detected possible evidences for apparent acceleration and precession of the jet according to the three-dimensional velocity structure. Based on the phase-referencing VLBI astrometry, we have successfully detected an annual parallax of the H2_{2}O maser in L1448C to be 4.31±\pm0.33~milliarcseconds (mas) which corresponds to a distance of 232±\pm18~pc from the Sun. The present result is in good agreement with that of another H2_{2}O maser source NGC~1333 SVS13A in the Perseus molecular cloud, 235~pc. It is also consistent with the photometric distance, 220~pc. Thus, the distance to the western part of the Perseus molecular cloud complex would be constrained to be about 235~pc rather than the larger value, 300~pc, previously reported.