Thanks Jeremy,

Some high-powered stuff in both those papers.

The Far-UV spectroscopy with HST in the first paper is astonishingly good and some surprising results on 46P.

The second paper shows that C/2016 R2 has a coma dominated by CO and N2 with H2O a hundred times less abundant, making it something of an oddity.

Richard

----- Original Message -----

From: Jeremy Shears

To: baa-comet@simplelists.com

Sent: Thursday, December 10, 2020 9:21 AM

Subject: [BAA Comets] Two recent ArXiv papers

FUV Observations of the Inner Coma of 46P/Wirtanen

John W. Noonan, Walter M. Harris, Steven Bromley, Davide Farnocchia, Jian-Yang Li, Kathleen E. Mandt, Joel Wm. Parker, Kumar Venkataramani, Dennis Bodewits

https://arxiv.org/abs/2012.04619

A physico-chemical model to study the ion density distribution in the inner coma of comet C/2016 R2(Pan-STARRS)

Susarla Raghuram, Anil Bhardwaj, Damien Hutsemékers, Cyrielle Opitom, Jean Manfroid, Emmanuel Jehin

https://arxiv.org/abs/2012.04611

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