Results 31 to 40 of about 4,911 (246)

Spitzer Observations of Interstellar Object 1I/‘Oumuamua [PDF]

The Astronomical Journal, 2018
Abstract 1I/‘Oumuamua is the first confirmed interstellar body in our solar system. Here we report on observations of ‘Oumuamua made with the Spitzer Space Telescope on 2017 November 21–22 (UT). We integrated for 30.2 hr at 4.5 μm (IRAC channel 2). We did not detect the object and place an upper limit on the flux of 0.3 μJy (3σ).
David E. Trilling, Michael Mommert, Joseph L. Hora, Davide Farnocchia, Paul Chodas, Jon Giorgini, Howard A. Smith, Sean Carey, Carey M. Lisse, Michael Werner, Andrew McNeill, Steven R. Chesley, Joshua P. Emery, Giovanni Fazio, Yanga R. Fernandez, Alan Harris, Massimo Marengo, Michael Mueller, Alissa Roegge, Nathan Smith, H. A. Weaver, Karen Meech, Marco Micheli   +22 more
openaire   +5 more sources

A fast response mission to rendezvous with an interstellar object [PDF]

Experimental Astronomy, 2022
17 pages, 9 ...
Darren Garber, Louis D. Friedman, Artur Davoyan, Slava G. Turyshev, Nahum Melamed, John McVey, Todd F. Sheerin   +6 more
openaire   +4 more sources

The Interstellar Object ’Oumuamua as a Fractal Dust Aggregate [PDF]

The Astrophysical Journal Letters, 2019
Abstract The first known interstellar object ’Oumuamua exhibited a nongravitational acceleration that appeared inconsistent with cometary outgassing, leaving radiation pressure as the most likely force. Barring the alien lightsail hypothesis, an ultra-low density due to a fractal structure might also explain the acceleration of ’Oumuamua
Eirik G. Flekkøy, Jane Luu, Renaud Toussaint   +2 more
openaire   +5 more sources

Predicting the water content of interstellar objects from galactic star formation histories [PDF]

, 2021
Planetesimals inevitably bear the signatures of their natal environment, preserving in their composition a record of the metallicity of their system's original gas and dust, albeit one altered by the formation processes.
Lintott, Christopher, Bannister, Michele, Mackereth, Ted   +2 more
core   +2 more sources

Detection Rate of <50-meter Interstellar Objects with LSST [PDF]

, 2023
The previous decade saw the discovery of the first four known interstellar objects due to advances in astronomical viewing equipment. Future sky surveys with greater sensitivity will allow for more frequent detections of such objects, including ...
Loeb, Abraham, Ezell, Carson
core   +1 more source

High spatial resolution galactic 3D extinction mapping with IPHAS [PDF]

, 2008
We present an algorithm (MEAD, for 'Mapping Extinction Against Distance') which will determine intrinsic (r' - i') colour, extinction, and distance for early-A to K4 stars extracted from the IPHAS r'/ i'/H alpha photometric data base.
R. A. H. Morris, Napiwotzki, Ralf, A. A. Zijlstra, Drew, J. E., Sale, Stuart E., J. E. Drew, N. A. Walton, Phillipps, S., Steeghs, D., P. J. Groot, Gaensicke, B. T., Unruh, Y.C., Morris, R.A.H., S. Phillipps, Groot, P., Sale, S.E., Sale, S. E., R. Napiwotzki, Drew, J.E., Morris, R. A H, M.J. Irwin, C. Knigge, Zijlstra, A.A., Napiwotzki, R., R. Greimel, Morris, R. A. H., Knigge, Christian, Groot, P.J., Gänsicke, B. T., A. Mampaso, Walton, N.A., Unruh, Y. C., Irwin, M. J., Mampaso, A., Knigge, C., Zijlstra, A. A.; id_orcid, Y. C. Unruh, Greimel, R., D. Steeghs, Irwin, M.J., Phillips, S., Gänsicke, B.T., Zijlstra, A. A., Groot, P. J., B. T. Gänsicke, Walton, N. A., Stuart E. Sale   +46 more
core   +1 more source

Solar Sails : Technology and demonstration status [PDF]

, 2012
Solar Sail propulsion has been validated in space (IKAROS, 2012) and soon several more solar-sail propelled spacecraft will be flown. Using sunlight for spacecraft propulsion is not a new idea.
Johnson, Les, McInnes, Colin, Lappas, Vaios, Young, Roy, Friedman, Louis, Barnes, Nathan   +5 more
core   +1 more source

The fate of interstellar objects during the collapse of molecular clouds - animations [PDF]

, 2020
Animations of collapsing molecular clouds containing a population of interstellar ...
Pfalzner, Suzanne, Portegies Zwart, Simon, Paterson, Dylan, Bannister, Michele   +3 more
core   +1 more source

Interstellar Probe: Humanity's exploration of the Galaxy Begins [PDF]

, 2022
During the course of its evolution, our Sun and its protective magnetic bubble have plowed through dramatically different interstellar environments throughout the galaxy.
McNutt, Ralph L., Mandt, K.E., Ralph L. McNutt, M.V. Paul, E.A. Provornikova, Linsky, J., Hill, M.E., M.E. Hill, Wurz, P., Wimmer-Schweingruber, R., K. Runyon, E.C. Roelof, Paul, M.V., K.E. Mandt, M. Opher, P. Wurz, Kurth, W.S., S. Bale, R. Wimmer-Schweingruber, Roelof, E.C., A. Galli, Provornikova, E.A., S. Redfield, A. Cocoros, Brandt, Pontus C., A.M. Rymer, Galli, A., Runyon, K., D. Turner, Kollmann, P., DeMajistre, R., C.M. Lisse, P. Kollmann, Turner, D., J. Kinnison, Opher, M., Cocoros, A., W.S. Kurth, Rymer, A.M., Kinnison, J., Pontus C. Brandt, J. Linsky, Lisse, C.M., Bale, S., R. DeMajistre, Redfield, S.   +45 more
core   +1 more source

Interstellar Meteors are Outliers in Material Strength [PDF]

, 2022
The first interstellar meteor larger than dust was detected by US government sensors in 2014, identified as an interstellar object candidate in 2019, and confirmed by the Department of Defense in 2022.
Loeb, Abraham, Siraj, Amir
core   +2 more sources