Status Report

Search for OH 18-cm radio emission from 1I/2017 U1 with the Green Bank telescope

By SpaceRef Editor
March 27, 2018
Filed under , ,

Ryan S. Park, D. J. Pisano, T. Joseph W. Lazio, Paul W. Chodas, Shantanu P. Naidu
(Submitted on 27 Mar 2018)

This paper reports the first OH 18-cm line observation of the first detected interstellar object 1I/2017 U1 (`Oumuamua) using the Green Bank Telescope. We have observed the OH lines at 1665.402 MHz, 1667.359, and 1720.53 MHz frequencies with a spectral resolution of 357 Hz (approximately 0.06 km-s^{-1}). At the time of the observation, `Oumuamua was at topocentric distance and velocity of 1.07 au and 63.4 km-s^{-1}, respectively, or at heliocentric distance and velocity of 1.8 au and 39 km-s^{-1}, respectively. Based on a detailed data reduction and an analogy-based inversion, our final results confirm the asteroidal origin of `Oumuamua (as discussed in Meech et al., 2017) with an upper bound of OH production of Q[OH] < 0.17 x 10^{28} s^{-1}.

Comments:    accepted for publication in Astronomical Journal, 7 pages, 1 figure, 1 table
Subjects:    Earth and Planetary Astrophysics (astro-ph.EP)
Cite as:    arXiv:1803.10187 [astro-ph.EP] (or arXiv:1803.10187v1 [astro-ph.EP] for this version)
Submission history
From: Ryan Park
[v1] Tue, 27 Mar 2018 17:15:28 GMT (260kb)

SpaceRef staff editor.