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  Micrometeoroid Events in LISA Pathfinder

Thorpe, J. I., Slutsky, J., Baker, J., Littenberg, T., Hourihane, S., Pagane, N., et al. (2019). Micrometeoroid Events in LISA Pathfinder. The Astrophysical Journal, 883 (1): 53. doi:10.3847/1538-4357/ab3649.

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 Creators:
Thorpe, James Ira, Author
Slutsky, Jacob, Author
Baker, John, Author
Littenberg, Tyson, Author
Hourihane, Sophie, Author
Pagane, Nicole, Author
Pokorny, Petr, Author
Janches, Diego, Author
Armano, Michele, Author
Audley, Heather1, Author           
Auger, G., Author
Baird, Jonathan, Author
Bassan, Massimo, Author
Binetruy, Pierre, Author
Born, Michael1, Author           
Bortoluzzi, D., Author
Brandt, N., Author
Caleno, M., Author
Cavalleri, A, Author
Cesarini, A, Author
Cruise, A. M., AuthorDanzmann, Karsten1, Author           Silva, M. de Deus, AuthorDe Rosa, R., AuthorDi Fiore, L., AuthorDiepholz, Ingo1, Author           Dixon, G., AuthorDolesi, R., AuthorDunbar, N., AuthorFerraioli, L., AuthorFerroni, V., AuthorFitzsimons, E., AuthorFlatscher, R., AuthorFreschi, M., AuthorMarirrodriga, C. Garcia, AuthorGerndt, R., AuthorGesa, L., AuthorGibert, F., AuthorGiardini, D., AuthorGiusteri, R., AuthorGrado, A., AuthorGrimani, C., AuthorGryzmisch, J., AuthorHarrison, I., AuthorHeinzel, Gerhard1, Author           Hewitson, Martin2, Author           Hollington, D., AuthorHoyland, D., AuthorHueller, M., AuthorInchauspe, H., AuthorJennrich, O., AuthorJetzer, P., AuthorJohlander, B., AuthorKarnesis , N.1, AuthorKaune, Brigitte1, Author           Korsakova , N.1, AuthorKillow, C., AuthorLobo, J. A., AuthorLloro, I., AuthorLiu, L., AuthorLopez-Zaragoza, J. P., AuthorMaarschalkerweerd, R., AuthorMance, D., AuthorMartin, V., AuthorMartin-Polo, L., AuthorMartino, J., AuthorMartin-Porqueras, F., AuthorMadden, S., AuthorMateos, I., AuthorMcNamara, P. W., AuthorMendes, J., AuthorMendes, L., AuthorNofarias, M., AuthorPaczkowski, S.1, Author           Perreur-Lloyd, M., AuthorPetiteau, A., AuthorPivato, P., AuthorPlagnol, E., AuthorPrat, P., AuthorRagnit, U., AuthorRamos-Castro, J., AuthorReiche, Jens1, Author           Robertson, D., AuthorRozemeijer, H., AuthorRivas, F., AuthorRussano, G., AuthorSarra, P., AuthorSchleicher, A., AuthorShaul, D., AuthorSoperta, C., AuthorStanga, R., AuthorSumner, T., AuthorTexier, D., AuthorTrobs, M., AuthorVetrungno, D., AuthorVitale, S., AuthorWanner, G., AuthorWard, H., AuthorWass, P., AuthorWealthy, D., AuthorWeber, W. J., AuthorWissel, Lennart1, Author           Wittchen, Andreas1, Author           Zambotti, A., AuthorZanoni, C., AuthorZiegler, T., AuthorZweifel, P., Author more..
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Astrophysics, Earth and Planetary Astrophysics, astro-ph.EP
 Abstract: The zodiacal dust complex, a population of dust and small particles that
pervades the Solar System, provides important insight into the formation and
dynamics of planets, comets, asteroids, and other bodies. Here we present a new
set of data obtained using a novel technique: direct measurements of momentum
transfer to a spacecraft from individual particle impacts. This technique is
made possible by the extreme precision of the instruments flown on the LISA
Pathfinder spacecraft, a technology demonstrator for a future space-based
gravitational wave observatory that operated near the first Sun-Earth Lagrange
point from early 2016 through Summer of 2017. Using a simple model of the
impacts and knowledge of the control system, we show that it is possible to
detect impacts and measure properties such as the transferred momentum (related
to the particle's mass and velocity), direction of travel, and location of
impact on the spacecraft. In this paper, we present the results of a systematic
search for impacts during 4348 hours of Pathfinder data. We report a total of
54 candidates with momenta ranging from 0.2$\,\mu\textrm{Ns}$ to
230$\,\mu\textrm{Ns}$. We furthermore make a comparison of these candidates
with models of micrometeoroid populations in the inner solar system including
those resulting from Jupiter-family comets, Oort-cloud comets, Hailey-type
comets, and Asteroids. We find that our measured population is consistent with
a population dominated by Jupiter-family comets with some evidence for a
smaller contribution from Hailey-type comets. This is in agreement with
consensus models of the zodiacal dust complex in the momentum range sampled by
LISA Pathfinder.

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 Dates: 2019-05-072019-10-022019
 Publication Status: Issued
 Pages: 22 pages, 14 figures, accepted in ApJ
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 883 (1) Sequence Number: 53 Start / End Page: - Identifier: -