Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Cochran, Anita"'
The study of cometary composition is important for understanding our solar system's early evolutionary processes. Carbon dioxide (CO2) is a common hypervolatile in comets that can drive activity but is more difficult to study than other hypervolatile
Externí odkaz:
http://arxiv.org/abs/2401.00956
We present high spectral resolution optical observations of comet 21P/Giacobini-Zinner from six nights in 2018. The observations were obtained with the Tull coude spectrograph on the 2.7m Harlan J. Smith Telescope of McDonald Observatory. This comet'
Externí odkaz:
http://arxiv.org/abs/2009.01308
Autor:
Roth, Nathan X., Bodewits, Dennis, Bonev, Boncho, Cochran, Anita, Combi, Michael, Cordiner, Martin, Russo, Neil Dello, DiSanti, Michael, Faggi, Sara, Feaga, Lori, Fernandez, Yan, Lippi, Manuela, McKay, Adam, Knight, Matthew, Milam, Stefanie, Noonan, John W., Remijan, Anthony, Villanueva, Geronimo
The study of comets affords a unique window into the birth, infancy, and subsequent history of the solar system. There is strong evidence that comets incorporated pristine interstellar material as well as processed nebular matter, providing insights
Externí odkaz:
http://arxiv.org/abs/2007.08568
We present high spectral resolution optical spectra obtained with the ARCES instrument at Apache Point Observatory showing detection of the [OI]6300 A line in interstellar comet 2I/Borisov. We employ the observed flux in this line to derive an H$_2$O
Externí odkaz:
http://arxiv.org/abs/1910.12785
Autor:
Nelson, Tyler, Cochran, Anita
We present high spectral-resolution observations of comets 122P/de Vico and 153P/Ikeya-Zhang obtained with the Tull Coud\'{e} spectrograph on the 2.7m Harlan J. Smith telescope of McDonald Observatory. We used these data to study the distribution of
Externí odkaz:
http://arxiv.org/abs/1910.03688
Autor:
Blunt, Sarah, Endl, Michael, Weiss, Lauren M., Cochran, William D., Howard, Andrew W., MacQueen, Phillip J., Fulton, Benjamin J., Henry, Gregory W., Johnson, Marshall C., Kosiarek, Molly R., Lawson, Kellen D., Macintosh, Bruce, Mills, Sean M., Nielsen, Eric L., Petigura, Erik A., Schneider, Glenn, Vanderburg, Andrew, Wisniewski, John P., Wittenmyer, Robert A., Brugamyer, Erik, Caldwell, Caroline, Cochran, Anita L., Hatzes, Artie P., Hirsch, Lea A., Isaacson, Howard, Robertson, Paul, Roy, Arpita, Shen, Zili
Based on two decades of radial velocity (RV) observations using Keck/HIRES and McDonald/Tull, and more recent observations using the Automated Planet Finder, we found that the nearby star HR 5183 (HD 120066) hosts a 3$M_J$ minimum mass planet with an
Externí odkaz:
http://arxiv.org/abs/1908.09925
Autor:
McKay, Adam, DiSanti, Michael, Kelley, Michael, Knight, Matthew, Womack, Maria, Wierzchos, Kacper, Harrington-Pinto, Olga, Bonev, Boncho, Villanueva, Geronimo, Russo, Neil Dello, Cochran, Anita, Biver, Nicolas, Bauer, James, Vervack, Jr., Ronald, Gibbs, Erika, Roth, Nathan, Kawakita, Hideyo
Comet C/2016 R2 (PanSTARRS) has a peculiar volatile composition, with CO being the dominant volatile as opposed to H$_2$O and one of the largest N$_2$/CO ratios ever observed in a comet. Using observations obtained with the \textit{Spitzer Space Tele
Externí odkaz:
http://arxiv.org/abs/1907.07208
We modeled observations of the C$_2$ $\mathrm{d} ^3\Pi_g - \mathrm{a} ^3\Pi_u$ (Swan) $\Delta \nu = 0$ sequence observed in spectra of comet 122P/de Vico obtained with the 2.7m Harlan J. Smith Telescope and Tull Coude spectrograph of McDonald observa
Externí odkaz:
http://arxiv.org/abs/1809.07715
Autor:
McKay, Adam J., Cochran, Anita L., DiSanti, Michael A., Russo, Neil Dello, Weaver, Harold, Vervack Jr., Ronald J., Harris, Walter M., Kawakita, Hideyo
We present H$_2$O production rates for comet C/2012 S1 (ISON) derived from observations of [OI] and OH emission during its inbound leg, covering a heliocentric distance range of 1.8-0.44 AU. Our production rates are in agreement with previous measure
Externí odkaz:
http://arxiv.org/abs/1802.06116
Autor:
Cochran, Anita L., McKay, Adam J.
Publikováno v:
ApJ Letters 854, L10, 2018
We report on imaging and spectroscopic observations of comet C/2016~R2 (Pan-STARRS) obtained with the 0.8\,m and 2.7\,m telescopes of McDonald Observatory in November and December 2017 respectively. The comet was at a heliocentric distance greater th
Externí odkaz:
http://arxiv.org/abs/1801.01199