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  Thermal properties of slowly rotating asteroids: results from a targeted survey

Marciniak, A., Alí-Lagoa, V., Müller, T. G., Szakáts, R., Molnár, L., Pál, A., et al. (2019). Thermal properties of slowly rotating asteroids: results from a targeted survey. Astronomy and Astrophysics, 625: A139. doi:10.1051/0004-6361/201935129.

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Marciniak, A., Author
Alí-Lagoa, V.1, Author              
Müller, T. G.1, Author              
Szakáts, R., Author
Molnár, L., Author
Pál, A., Author
Podlewska-Gaca, E., Author
Parley, N., Author
Antonini, P., Author
Barbotin, E., Author
Behrend, R., Author
Bernasconi, L., Author
Butkiewicz-Bąk, M., Author
Crippa, R., Author
Duffard, R., Author
Ditteon, R., Author
Feuerbach, M., Author
Fauvaud, S., Author
Garlitz, J., Author
Geier, S., Author
Goncalves, R., AuthorGrice, J., AuthorGrześkowiak, I., AuthorHirsch, R., AuthorHorbowicz, J., AuthorKamiński, K., AuthorKamińska, M. K., AuthorKim, D.-H., AuthorKim, M.-J., AuthorKonstanciak, I., AuthorKudak, V., AuthorKulczak, P., AuthorMaestre, J. L., AuthorManzini, F., AuthorMarks, S., AuthorMonteiro, F., AuthorOgłoza, W., AuthorOszkiewicz, D., AuthorPilcher, F., AuthorPerig, V., AuthorPolakis, T., AuthorPolińska, M., AuthorRoy, R., AuthorSanabria, J. J., AuthorSantana-Ros, T., AuthorSkiff, B., AuthorSkrzypek, J., AuthorSobkowiak, K., AuthorSonbas, E., AuthorThizy, O., AuthorTrela, P., AuthorUrakawa, S., AuthorZejmo, M., AuthorZukowski, K., Author more..
Affiliations:
1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: Context. Earlier work suggests that slowly rotating asteroids should have higher thermal inertias than faster rotators because the heat wave penetrates deeper into the subsurface. However, thermal inertias have been determined mainly for fast rotators due to selection effects in the available photometry used to obtain shape models required for thermophysical modelling (TPM). Aims. Our aims are to mitigate these selection effects by producing shape models of slow rotators, to scale them and compute their thermal inertia with TPM, and to verify whether thermal inertia increases with the rotation period. Methods. To decrease the bias against slow rotators, we conducted a photometric observing campaign of main-belt asteroids with periods longer than 12 h, from multiple stations worldwide, adding in some cases data from WISE and Kepler space telescopes. For spin and shape reconstruction we used the lightcurve inversion method, and to derive thermal inertias we applied a thermophysical model to fit available infrared data from IRAS, AKARI, and WISE. Results. We present new models of 11 slow rotators that provide a good fit to the thermal data. In two cases, the TPM analysis showed a clear preference for one of the two possible mirror solutions. We derived the diameters and albedos of our targets in addition to their thermal inertias, which ranged between 3−3+33 and 45−30+60 J m−2 s−1∕2 K−1. Conclusions. Together with our previous work, we have analysed 16 slow rotators from our dense survey with sizes between 30 and 150 km. The current sample thermal inertias vary widely, which does not confirm the earlier suggestion that slower rotators have higher thermal inertias.

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 Dates: 2019-05-28
 Publication Status: Published online
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/201935129
Other: LOCALID: 3069186
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Affiliations:
Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 625 Sequence Number: A139 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1