Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-03-28
Astronomy and Astrophysics
Astrophysics
accepted for Icarus
Scientific paper
10.1016/j.icarus.2008.02.023
Comet 73P-B/Schwassmann-Wachmann 3 was observed with IRCS/Subaru at geocentric distance of 0.074 AU on UT 10 May 2006. Multiple H2O emission lines were detected in non-resonant fluorescence near 2.9 microns. No significant variation in total H2O production rate was found during the (3 hour) duration of our observations. H2O rotational temperatures and ortho-to-para abundance ratios were measured for several positions in the coma. The temperatures extracted from two different time intervals show very similar spatial distributions. For both, the rotational temperature decreased from ~110 K to ~90 K as the projected distance from the nucleus increased from ~5 to ~30 km. We see no evidence for OPR change in the coma. The H2O ortho-para ratio is consistent with the statistical equilibrium value (3.0) for all spatially resolved measurements. This implies a nuclear spin temperature higher than ~ 45 K.
Bonev Boncho P. .
Kawakita Hideyo
Kobayashi Hitomi
Mumma Michael J.
Villanueva Geronimo L.
No associations
LandOfFree
IRCS/Subaru Observations of Water in the Inner Coma of Comet 73P-B/Schwassmann-Wachmann 3: Spatially Resolved Rotational Temperatures and Ortho-Para Ratios does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with IRCS/Subaru Observations of Water in the Inner Coma of Comet 73P-B/Schwassmann-Wachmann 3: Spatially Resolved Rotational Temperatures and Ortho-Para Ratios, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IRCS/Subaru Observations of Water in the Inner Coma of Comet 73P-B/Schwassmann-Wachmann 3: Spatially Resolved Rotational Temperatures and Ortho-Para Ratios will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-173894