Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Parker, Joel Wm"'
Autor:
Keeney, Brian A., Parker, Joel Wm., Cunningham, Nathaniel, Stern, S. Alan, Verbiscer, Anne J., Team, the New Horizons
Publikováno v:
Planetary Science Journal, 2021, Volume 2, Article 164
We present the first measurements of Charon's far-ultraviolet surface reflectance, obtained by the Alice spectrograph on New Horizons. We find no measurable flux shortward of 1650 A, and Charon's geometric albedo is $<0.019$ ($3\sigma$) at 1600 A. Fr
Externí odkaz:
http://arxiv.org/abs/2107.14068
Autor:
Noonan, John W., Rinaldi, Giovanna, Feldman, Paul D., Stern, S. Alan, Parker, Joel Wm., Keeney, Brian A., Bockelée-Morvan, Dominique, Vervack Jr., Ronald J., Steffl, Andrew J., Knight, Matthew M., Schindhelm, Rebecca N., Feaga, Lori M., Pineau, Jon, Medina, Richard, Weaver, Harold A., Bertaux, Jean-Loup, A'Hearn, Michael F.
Publikováno v:
The Astronomical Journal, Volume 162, Number 1, 4, 2021
Cometary outbursts offer a valuable window into the composition of comet nuclei with their forceful ejection of dust and volatiles in explosive events, revealing the interior components of the comet. Understanding how different types of outbursts inf
Externí odkaz:
http://arxiv.org/abs/2106.04736
Autor:
Noonan, John W., Bockelée-Morvan, Dominique, Feldman, Paul D., Stern, S. Alan, Keeney, Brian A., Parker, Joel Wm., Biver, Nicolas, Knight, Matthew M., Feaga, Lori M., Hofstadter, Mark D., Lee, Seungwon, Vervack Jr., Ronald J., Steffl, Andrew J., Schindhelm, Rebecca N., Pineau, Jon, Medina, Richard, Weaver, Harold A., Bertaux, Jean-Loup, A'Hearn, Michael F.
Publikováno v:
The Astronomical Journal, Volume 162, Number 1, 5, 2021
The Alice ultraviolet spectrograph on board the \textit{Rosetta} orbiter provided the first near-nucleus ultraviolet observations of a cometary coma from arrival at comet 67P/Churyumov-Gerasimenko in 2014 August through 2016 September. The characteri
Externí odkaz:
http://arxiv.org/abs/2106.04737
Autor:
Noonan, John W., Harris, Walter M., Bromley, Steven, Farnocchia, Davide, Li, Jian-Yang, Mandt, Kathleen E., Parker, Joel Wm., Venkataramani, Kumar, Bodewits, Dennis
Far ultraviolet observations of comets yield information about the energetic processes that dissociate the sublimated gases from their primitive surfaces. Understanding which emission processes are dominant, their effects on the observed cometary spe
Externí odkaz:
http://arxiv.org/abs/2012.04619
Autor:
Stern, S. Alan, Protopapa, Silvia, Freeman, Matthew, Parker, Joel Wm., Tapley, Mark, Seligman, Darryl Z., Andersson, Caden
Publikováno v:
In Planetary and Space Science February 2024 241
Autor:
Steffl, Andrew J., Young, Leslie A., Strobel, Darrell F., Kammer, Joshua A., Evans, J. Scott, Stevens, Michael H., Schindhelm, Rebecca N., Parker, Joel Wm., Stern, S. Alan, Weaver, Harold A., Olkin, Catherine B., Ennico, Kimberly, Cummings, Jay R., Gladstone, G. Randall, Greathouse, Thomas K., Hinson, David P., Retherford, Kurt D., Summers, Michael E., Versteeg, Maarten
During the New Horizons spacecraft's encounter with Pluto, the Alice ultraviolet spectrograph conducted a series of observations that detected emissions from both the interplanetary medium (IPM) and Pluto. In the direction of Pluto, the IPM was found
Externí odkaz:
http://arxiv.org/abs/2004.12509
Autor:
Gladstone, G. Randall, Pryor, Wayne R., Stern, S. Alan, Ennico, Kimberly, Olkin, Catherine B., Spencer, John R., Weaver, Harold A., Young, Leslie A., Bagenal, Fran, Cheng, Andrew F., Cunningham, Nathaniel J., Elliott, Heather A, Greathouse, Thomas K., Hinson, David P., Kammer, Joshua A., Linscott, Ivan R., Parker, Joel Wm., Retherford, Kurt D., Steffl, Andrew J., Strobel, Darrell F., Summers, Michael E., Throop, Henry, Versteeg, Maarten H., Davis, Michael W., Team, the New Horizons Science
Recent observations of interplanetary medium (IPM) atomic hydrogen Lyman-{\alpha} (Ly{\alpha}) emission in the outer solar system, made with the Alice ultraviolet spectrograph on New Horizons (NH), are presented. The observations include regularly sp
Externí odkaz:
http://arxiv.org/abs/1808.00400
Autor:
Noonan, John W., Stern, S. Alan, Feldman, Paul D., Broiles, Thomas, Wedlund, Cyril Simon, Edberg, Niklas J. T., Schindhelm, R., Parker, Joel Wm., Keeney, Brian A., Vervack Jr, Ronald J., Steffl, Andrew J., Knight, Matthew M., Weaver, Harold A., Feaga, Lori M., A'Hearn, Michael, Bertaux, Jean-Loup
Publikováno v:
Noonan et al. 2018, Astronomical Journal, Volume 156, Number 1
The Alice ultraviolet spectrograph on the European Space Agency Rosetta spacecraft observed comet 67P/Churyumov-Gerasimenko in its orbit around the Sun for just over two years. Alice observations taken in 2015 October, two months after perihelion, sh
Externí odkaz:
http://arxiv.org/abs/1806.06948
Autor:
Feldman, Paul D., A'Hearn, Michael F., Bertaux, Jean-Loup, Feaga, Lori M., Keeney, Brian A., Knight, Matthew M., Noonan, John, Parker, Joel Wm., Schindhelm, Rebecca, Steffl, Andrew J., Stern, S. Alan, Vervack, Ronald J., Weaver, Harold A.
Publikováno v:
Astronomical Journal 155:9, 2018
The Alice far-ultraviolet imaging spectrograph onboard Rosetta observed emissions from atomic and molecular species from within the coma of comet 67P/Churyumov-Gerasimenko during the entire escort phase of the mission from 2014 August to 2016 Septemb
Externí odkaz:
http://arxiv.org/abs/1711.07380
Autor:
Pineau, Jon P., Parker, Joel Wm., Steffl, Andrew J., Schindhelm, Rebecca, Medina, Richard, Stern, S. Alan, Versteeg, M., Birath, Emma M.
This paper explores the uniqueness of ESA Rosetta mission operations from the Alice instrument point of view, documents lessons learned, and suggests operations ideas for future missions. The Alice instrument mounted on the Rosetta orbiter is an imag
Externí odkaz:
http://arxiv.org/abs/1711.02811