Skip to main content Accessibility help

LBA high resolution observations of ground- and excited-state OH masers towards G351.417+0.645

  • T. Chanapote (a1) (a2) (a3), K. Asanok (a1) (a3), R. Dodson (a2), M. Rioja (a2) (a4) (a5), J. A. Green (a6) and B. Hutawarakorn Kramer (a3) (a7)...


We present the results from the Australian Long Baseline Array (LBA) observations of the ground- and excited-state OH masers at high resolutions towards the massive star-forming region G351.417+0.645 in 2012. We obtain the most accurate spatial gradient of magnetic fields at ground state transitions and verify the reliability of magnetic field strengths measured from previous lower resolution observations. In comparison with previous LBA observations in 2001 at 6.0 GHz, we identified several matched Zeeman pairs. We found that the OH maser features have no significant change of magnetic field strengths and directions with small internal proper motions, implying quite stable physical conditions. Additionally, we found that 1665- and 6035-MHz OH maser features reveal the same trend of reversal of magnetic fields. Moreover, we also analyzed the physical conditions at different locations from the coincidence of different OH maser transitions based on current OH maser models.



Hide All
Caswell, J. L., Kramer, B. H., & Reynolds, J. E., 2011, MNRAS, 414, 1914
Cragg, D. M., Sobolev, A. M., & Godfrey, P. D., 2002, MNRAS, 331, 521
Hunter, T. R., Brogan, C. L., Megeath, S. T., Menten, K. M., Beuther, H., & Thorwirth, S., 2006, ApJ, 649, 888
MathJax is a JavaScript display engine for mathematics. For more information see



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed