(Christensen) as observed with Herschel M. de Val-Borro1,2, D. Bockelee-Morvan3, E. Jehin4, P. Hartogh1, C. Opitom4, S. Szutowicz5, N. Biver3, J. Crovisier3, D. C. Lis6, L. Rezac1, Th. de Graauw7, D. Hutsemekers4, C. Jarchow1, M. R. Kidger8, M. Kuppers9, L. M. Lara10, J. Manfroid4, M. Rengel1, B. M. Swinyard11,12, D. Teyssier8, B. Vandenbussche13, and C. Waelkens13 1MPS, 2Princeton University, 3LESIA, Observatoire de Paris, 4Universite de Liege, 5Polish Academy of Sciences, 6Caltech, 7Joint ALMA Observatory, 8Herschel Science Centre, 9ESAC, 10IAA, 11RAL Space, 12UCL, 12Katholieke Universiteit Leuven

Space observatory

Cite

Citations (0)

The chemical diversity of comets: recent results from radio observations

HAL (Le Centre pour la Communication Scientifique Directe) (2008)

J. Crovisier N. Biver D. Bockelée‐Morvan J. Boissier P. Colom

Source

Cite

Citations (0)

The distribution and excitation of CH 3 OH in comet C/2012 K1 (PanSTARRS) from ALMA

DPS (2015)

Stefanie N. Milam Martin Cordiner J. Boissier Steven B. Charnley Anthony J. Remijan

Source

Cite

Citations (0)

Exposed water ice on the nucleus of comet 67P/Churyumov–Gerasimenko

Nature (2016)

G. Filacchione M. C. De Sanctis F. Capaccioni A. Raponi F. Tosi

Comet nucleus

Water ice

10.1038/nature16190

Cite

Citations (114)

Recurrent Cometary Activity in Near-Earth Object (3552) Don Quixote

The Planetary Science Journal (2020)

Michael Mommert Joseph L. Hora David E. Trilling N. Biver Kacper Wierzchoś

Abstract We report on observations of activity in near-Earth object (3552) Don Quixote using the Spitzer Space Telescope and ground-based telescopes around its 2018 perihelion passage. Spitzer observations obtained six months before perihelion show extended emission around the target’s nucleus that is most likely caused by molecular band emission from either CO 2 or CO, but we find no significant emission from dust. Ground-based optical observations taken close to perihelion reveal for the first time activity in the optical wavelengths, which we attribute to solar light reflected from dust particles. IRAM millimeter radio observations taken around the same time are unable to rule out CO as the driver of the molecular band emission observed with Spitzer. The comparison of the gas activity presented here with observations performed during Don Quixote’s previous apparition suggests that activity in Don Quixote is recurrent. We conclude that (3552) Don Quixote is most likely a weakly active comet.

Spitzer Space Telescope

10.3847/psj/ab8ae5

Cite

Citations (9)

Measuring the Distribution and Excitation of Cometary CH3OH Using ALMA

arXiv (Cornell University) (2016)

Martin Cordiner Steven B. Charnley M. J. Mumma D. Bockelée‐Morvan N. Biver

The Atacama Large Millimeter/submillimeter Array (ALMA) was used to obtain measurements of spatially and spectrally resolved CH$_3$OH emission from comet C/2012 K1 (PanSTARRS) on 28-29 June 2014. Detection of 12-14 emission lines of CH$_3$OH on each day permitted the derivation of spatially-resolved rotational temperature profiles (averaged along the line of sight), for the innermost 5000 km of the coma. On each day, the CH$_3$OH distribution was centrally peaked and approximately consistent with spherically symmetric, uniform outflow. The azimuthally-averaged CH$_3$OH rotational temperature ($T_{rot}$) as a function of sky-projected nucleocentric distance ($\rho$), fell by about 40 K between $\rho=0$ and 2500 km on 28 June, whereas on 29 June, $T_{rot}$ fell by about 50 K between $\rho=$0 km and 1500 km. A remarkable ($\sim50$ K) rise in $T_{rot}$ at $\rho=$1500-2500 km on 29 June was not present on 28 June. The observed variations in CH$_3$OH rotational temperature are interpreted primarily as a result of variations in the coma kinetic temperature due to adiabatic cooling, and heating through Solar irradiation, but collisional and radiative non-LTE excitation processes also play a role.

Mean kinetic temperature

Submillimeter Array

Coma (optics)

Line-of-sight

Outflow

Line (geometry)

10.48550/arxiv.1602.03488

Cite

Citations (3)

Distributed source of glycine in 67P/ Churyumov Gerasimenko

EPSC-DPS Joint Meeting 2019 (2019)

Katia Hadraoui Hervé Cottin Stavro Ivanovski Pascal Zapf K. Altwegg

Source

Cite

Citations (0)