Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Joel Wm. Parker"'
Autor:
John W. Noonan, Joel Wm. Parker, Walter M. Harris, Steven Bromley, Mohammad Saki, Youssef Moulane, Davide Farnocchia, Marco Micheli, Jian-Yang Li, Kathleen E. Mandt, Kumar Venkataramani, Dennis Bodewits
Publikováno v:
The Planetary Science Journal, Vol 4, Iss 4, p 73 (2023)
Jupiter-family comets are ephemeral small bodies injected into the inner solar system from the Kuiper Belt, doomed to either sublimate all their volatiles and become inert or violently shatter from the activity. We investigate two target candidates o
Externí odkaz:
https://doaj.org/article/65a60d9eae8348609b1b6a7d94380db2
Autor:
John W. Noonan, Walter M. Harris, Steven Bromley, Davide Farnocchia, Jian-Yang Li, Kathleen E. Mandt, Joel Wm. Parker, Kumar Venkataramani, Dennis Bodewits
Publikováno v:
The Planetary Science Journal, Vol 4, Iss 2, p 40 (2023)
Externí odkaz:
https://doaj.org/article/a07408c4214b4a83be11441448ff080a
Autor:
Arnaud Beth, Anders Eriksson, Paul D. Feldman, Martin Rubin, Y.-C. Cheng, Joel Wm. Parker, D. Bockelée-Morvan, Fredrik Johansson, Marina Galand, James L. Burch, Nicolas Biver, P. Stephenson
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 647, pp.A119. ⟨10.1051/0004-6361/202039155⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 647, pp.A119. ⟨10.1051/0004-6361/202039155⟩
Aims. We aim to determine whether dissociative excitation of cometary neutrals by electron impact is the major source of far-ultraviolet (FUV) emissions at comet 67P/Churyumov-Gerasimenko in the southern hemisphere at large heliocentric distances, bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81201ed7607e671779f2cc021d9f390f
https://hal.archives-ouvertes.fr/hal-03428276/file/Stephenson-aa39155-20.pdf
https://hal.archives-ouvertes.fr/hal-03428276/file/Stephenson-aa39155-20.pdf
Autor:
G. Randall Gladstone, Carey M. Lisse, Leslie A. Young, Joel Wm. Parker, Kelsi N. Singer, John R. Spencer, Harold A. Weaver, S. Alan Stern
Publikováno v:
The Planetary Science Journal. 3:111
During the New Horizons flyby of Kuiper Belt object (486958) Arrokoth on 2019 January 1, a search was made for escaping volatiles. Using the Alice spectrograph, appulse observations of both the Sun and the star HD42954 were performed to look for sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff28e3240ec18d2851281c54ad121b48
https://doi.org/10.3847/psj/ac6098
https://doi.org/10.3847/psj/ac6098
Autor:
Joel Wm. Parker, Nathaniel J. Cunningham, Anne J. Verbiscer, Brian A. Keeney, New Horizons Team, S. Alan Stern
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 $
Comment: Accepted for publi
Comment: Accepted for publi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35ab593113a59650376062894fed392c
Autor:
Jian-Yang Li, Joel Wm. Parker, Davide Farnocchia, Kathleen Mandt, Walter M. Harris, Paul D. Feldman, Michele T. Bannister, Zexi Xing, John Noonan, Dennis Bodewits
We will present the results of coordinated observations of 2I/Borisov with the Neil Gehrels-Swift observatory (Swift) and Hubble Space Telescope (HST), which allowed us to provide the first glimpse into the ice content and chemical composition of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::852463cb2e966631f06fcdfdfdfc95b0
https://doi.org/10.5194/epsc2020-993
https://doi.org/10.5194/epsc2020-993
Autor:
S. Alan Stern, Andrew J. Steffl, Kelsi N. Singer, John R. Spencer, Joshua A. Kammer, Darrell F. Strobel, Michael W. Davis, G. Randall Gladstone, Harold A. Weaver, Carey M. Lisse, Leslie A. Young, D. T. Hall, Kurt D. Retherford, Wayne R. Pryor, Maarten H. Versteeg, Joel Wm. Parker
Publikováno v:
The Astronomical Journal. 162:241
Since 2007 the Alice spectrograph on the New Horizons (NH) spacecraft has been used to periodically observe the Lyman-α (Lyα) emissions of the interplanetary medium (IPM), which mostly result from resonant scattering of solar Lyα emissions by inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d55d67a798c07a5265189f80ed8b3bbc
https://doi.org/10.3847/1538-3881/ac23cd
https://doi.org/10.3847/1538-3881/ac23cd
Autor:
Andrew J. Steffl, Joel Wm. Parker, S. Alan Stern, Paul D. Feldman, Brian A. Keeney, Harold A. Weaver, Eric Schindhelm, Jon Pineau, Lori M. Feaga, Richard Medina, M. H. Versteeg, Jean-Loup Bertaux, Michael F. A'Hearn
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 469 (Suppl_2), pp.S158-S177. ⟨10.1093/mnras/stx1426⟩
Monthly Notices of the Royal Astronomical Society, 2017, 469 (Suppl_2), pp.S158-S177. ⟨10.1093/mnras/stx1426⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 469 (Suppl_2), pp.S158-S177. ⟨10.1093/mnras/stx1426⟩
Monthly Notices of the Royal Astronomical Society, 2017, 469 (Suppl_2), pp.S158-S177. ⟨10.1093/mnras/stx1426⟩
We have detected H$_2$O and O$_2$ absorption against the far-UV continuum of stars located on lines of sight near the nucleus of Comet 67P/Churyumov-Gerasimenko using the Alice imaging spectrograph on Rosetta. These stellar appulses occurred at impac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a13ed9c3273ba3501941b30edf1d796
https://doi.org/10.1093/mnras/stx1426
https://doi.org/10.1093/mnras/stx1426
Autor:
Catherine B. Olkin, Dale P. Cruikshank, Simon B. Porter, Orkan M. Umurhan, Allen Lunsford, Silvia Protopapa, M. Ruaud, James Tuttle Keane, A. F. Cheng, Alex Parker, Mihaly Horanyi, Eric Quirico, Mark R. Showalter, Jeffrey M. Moore, D. E. Jennings, G. R. Gladstone, Francesca Scipioni, Bernard Schmitt, Amanda M. Zangari, Matthew E. Hill, Carly Howett, Ralph L. McNutt, S. A. Stern, John R. Spencer, William B. McKinnon, Marc W. Buie, L. Gabasova, Paul M. Schenk, D. C. Reuter, Kelsi N. Singer, G. Weigle, Anne J. Verbiscer, Joel Wm. Parker, Daniel T. Britt, Michael K. Bird, David J. McComas, H. A. Weaver, Leslie A. Young, H. A. Elliott, A. M. Earle, Yvonne J. Pendleton, Richard P. Binzel, Jason C. Cook, Ivan Linscott, William M. Grundy, Sebastiaan Krijt, C. M. Dalle Ore, Bonnie J. Buratti, Jj Kavelaars
Publikováno v:
Science
Science, American Association for the Advancement of Science, 2020, 367 (6481), pp.eaay3705. ⟨10.1126/science.aay3705⟩
arXiv
Science, American Association for the Advancement of Science, 2020, 367 (6481), pp.eaay3705. ⟨10.1126/science.aay3705⟩
arXiv
The outer Solar System object (486958) Arrokoth (provisional designation 2014 MU69) has been largely undisturbed since its formation. We studied its surface composition using data collected by the New Horizons spacecraft. Methanol ice is present alon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18f1f6da3c2d369eeb1a9d1a408361f7
Autor:
Richard P. Binzel, Bonnie J. Buratti, Paul M. Schenk, Andrew R. Poppe, Leslie A. Young, Mihaly Horanyi, Jeffrey M. Moore, Andrew F. Cheng, Harold A. Weaver, Kelsi N. Singer, Ivan Linscott, Mark R. Showalter, Tod R. Lauer, William M. Grundy, Anne J. Verbiscer, Carey M. Lisse, John R. Spencer, Dennis C. Reuter, Simon B. Porter, S. Alan Stern, William B. McKinnon, Jorge I. Nunez, Joel Wm. Parker, Marc Postman, J. J. Kavelaars, Catherine B. Olkin, Daniel T. Britt, Marc W. Buie, Stuart J. Robbins, Daniel D. Durda
We used existing data from the New Horizons LORRI camera to measure the optical-band ($0.4\lesssim\lambda\lesssim0.9{\rm\mu m}$) sky brightness within seven high galactic latitude fields. The average raw level measured while New Horizons was 42 to 45
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9392a4c658012b4bade07be8a419b56a