Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Samarasinha, Nalin"'
We summarize the collective knowledge of physical and surface properties of comet nuclei, focusing on those that are obtained from remote observations. We now have measurements or constraints on effective radius for over 200 comets, rotation periods
Externí odkaz:
http://arxiv.org/abs/2304.09309
We analyze jet features found in the coma of Comet 21P/Giacobini-Zinner (21P/GZ) during its 2018 perihelion passage using narrowband CN photometric imaging in order to determine the comet's rotational period, and constrain the CN gas outflow velocity
Externí odkaz:
http://arxiv.org/abs/2211.09258
Publikováno v:
Mon. Not. R. Astron. Soc. 509, 3065-3085 (2022)
The European Space Agency Rosetta/Philae mission to Comet 67P/Churyumov-Gerasimenko in 2014-2016 is the most complete and diverse investigation of a comet carried out thus far. Yet, many physical and chemical properties of the comet remain uncertain
Externí odkaz:
http://arxiv.org/abs/2209.05591
Autor:
Springmann, Alessondra, Harris, Walter M., Ryan, Erin L., Lejoly, Cassandra, Howell, Ellen S., Mueller, Beatrice E. A., Samarasinha, Nalin H., Woodney, Laura M., Steckloff, Jordan K.
Studying materials released from Jupiter-family comets (JFCs) -- as seen in their inner com\ae, the envelope of gas and dust that forms as the comet approaches the Sun -- improves the understanding of their origin and evolutionary history. As part of
Externí odkaz:
http://arxiv.org/abs/2107.10351
Autor:
Schambeau, Charles A., Fernandez, Yanga R., Samarasinha, Nalin H., Womack, Maria, Bockelee-Morvan, Dominique, Lisse, Carey M., Woodney, Laura M.
We present analyses of Spitzer observations of 29P/Schwassmann-Wachmann 1 using 16 $\mu$m IRS "blue" peak-up (PU) and 24 $\mu$m and 70 $\mu$m MIPS images obtained on UT 2003 November 23 and 24 that characterize the Centaur's large-grain (10-100 $\mu$
Externí odkaz:
http://arxiv.org/abs/2105.01789
Autor:
Zhao, Yuhui, Rezac, Ladislav, Skorov, Yuri, Hu, Shoucun, Samarasinha, Nalin H, Li, Jian-Yang.
The New Horizons spacecraft's flyby of Kuiper Belt Object (KBO) (486958) Arrokoth revealed a bilobed shape with highly flattened lobes both aligned to its equatorial plane, and a rotational axis almost aligned to the orbital plane (obliquity ~99 deg)
Externí odkaz:
http://arxiv.org/abs/2010.06434
We present analysis of {\it Hubble Space Telescope} (HST) observations of Centaur 29P/Schwassmann-Wachmann 1 (SW1) while in outburst to characterize the outburst coma and place constraints on the nucleus' spin state. The observations consist of Wide
Externí odkaz:
http://arxiv.org/abs/1911.00049
Samarasinha & Mueller (2013) related changes of cometary rotation to other physical parameters for four Jupiter family comets defining a parameter $X$, which is approximately constant within a factor of two irrespective of the active fraction of a co
Externí odkaz:
http://arxiv.org/abs/1806.11158
Sublimative outgassing of comets produces torques that alter the rotation state of their nuclei. Recently, parameterized sublimative torque models have been developed to study rotation state changes of individual comet nuclei and populations of comet
Externí odkaz:
http://arxiv.org/abs/1804.10232
Autor:
Li, Jian-Yang, Kelley, Michael S. P., Samarasinha, Nalin H., Farnocchia, Davide, Mutchler, Max J., Ren, Yanqiong, Lu, Xiaoping, Tholen, David J., Lister, Tim, Micheli, Marco
We imaged Comet 252P/2000 G1 (LINEAR) (hereafter 252P) with the Hubble Space Telescope and both 252P and P/2016 BA$_{14}$ (PanSTARRS) (hereafter BA$_{14}$) with the Discovery Channel Telescope in March and April 2016, surrounding its close encounter
Externí odkaz:
http://arxiv.org/abs/1708.05190