2019A&A...625A.139M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET05:45:33

2019A&A...625A.139M - Astronomy and Astrophysics, volume 625A, 139-139 (2019/5-1)

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

MARCINIAK A., ALI-LAGOA V., MULLER T.G., SZAKATS R., MOLNAR L., PAL A., PODLEWSKA-GACA E., PARLEY N., ANTONINI P., BARBOTIN E., BEHREND R., BERNASCONI L., BUTKIEWICZ-BAK M., CRIPPA R., DUFFARD R., DITTEON R., FEUERBACH M., FAUVAUD S., GARLITZ J., GEIER S., GONCALVES R., GRICE J., GRZESKOWIAK I., HIRSCH R., HORBOWICZ J., KAMINSKI K., KAMINSKA M.K., KIM D.-H., KIM M.-J., KONSTANCIAK I., KUDAK V., KULCZAK P., MAESTRE J.L., MANZINI F., MARKS S., MONTEIRO F., OGLOZA W., OSZKIEWICZ D., PILCHER F., PERIG V., POLAKIS T., POLINSKA M., ROY R., SANABRIA J.J., SANTANA-ROS T., SKIFF B., SKRZYPEK J., SOBKOWIAK K., SONBAS E., THIZY O., TRELA P., URAKAWA S., ZEJMO M. and ZUKOWSKI K.

Abstract (from CDS):


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 12h, 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+60J/m2/s1/2/K.
Conclusions. Together with our previous work, we have analysed 16 slow rotators from our dense survey with sizes between 30 and 150km. The current sample thermal inertias vary widely, which does not confirm the earlier suggestion that slower rotators have higher thermal inertias.

Abstract Copyright: © ESO 2019

Journal keyword(s): minor planets, asteroids: general - techniques: photometric - radiation mechanisms: thermal

VizieR on-line data: <Available at CDS (J/A+A/625/A139): 100obs.dat 109obs.dat 195obs.dat 301obs.dat 335obs.dat 380obs.dat 468obs.dat 538obs.dat 653obs.dat 673obs.dat 834obs.dat 100lcs.dat 109lcs.dat 195lcs.dat 301lcs.dat 335lcs.dat 380lcs.dat 468lcs.dat 538lcs.dat 653lcs.dat 673lcs.dat 834lcs.dat>

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