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arXiv 2109.00463astro-ph.EP
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从凸反演热物理模型看缓慢旋转小行星的性质

Properties of slowly rotating asteroids from the Convex Inversion Thermophysical Model

A. Marciniak, J. Ďurech, V. Alí-Lagoa, W. Ogłoza, R. Szakáts, T. G. Müller, L. Molnár, A. Pál, F. Monteiro, P. Arcoverde, R. Behrend, Z. Benkhaldoun, L. Bernasc… 展开作者

A. Marciniak, J. Ďurech, V. Alí-Lagoa, W. Ogłoza, R. Szakáts, T. G. Müller, L. Molnár, A. Pál, F. Monteiro, P. Arcoverde, R. Behrend, Z. Benkhaldoun, L. Bernasconi, J. Bosch, S. Brincat, L. Brunetto, M. Butkiewicz - Bąk, F. Del Freo, R. Duffard, M. Evangelista-Santana, G. Farroni, S. Fauvaud, M. Fauvaud, M. Ferrais, S. Geier, J. Golonka, J. Grice, R. Hirsch, J. Horbowicz, E. Jehin, P. Julien, Cs. Kalup, K. Kamiński, M. K. Kamińska, P. Kankiewicz, V. Kecskeméthy, D. -H. Kim, M. -J. Kim, I. Konstanciak, J. Krajewski, V. Kudak, P. Kulczak, T. Kundera, D. Lazzaro, F. Manzini, H. Medeiros, J. Michimani-Garcia, N. Morales, J. Nadolny, D. Oszkiewicz, E. Pakštienė, M. Pawłowski, V. Perig, F. Pilcher, P. Pinel, E. Podlewska-Gaca, T. Polakis, F. Richard, T. Rodrigues, E. Rondon, R. Roy, J. J. Sanabria, T. Santana-Ros, B. Skiff, J. Skrzypek, K. Sobkowiak, E. Sonbas, G. Stachowski, J. Strajnic, P. Trela, Ł. Tychoniec, S. Urakawa, E. Verebelyi, K. Wagrez, M. Żejmo, K. Żukowski

摘要:

TESS任务的结果表明,以前的研究严重低估了慢旋转小行星的数量,揭示了研究这些小行星的重要性。对于大多数旋转缓慢的小行星(P > 12),由于观测选择效应,没有自旋和形状模型。这妨碍了它们的热参数和准确尺寸的确定。我们将继续努力,尽量减少主带小行星之间的选择效应。我们的目标是具有低光变曲线振幅的慢旋转体。我们的目标是提供他们的比例旋转和形状模型,以及热惯性,热膨胀系数和表面粗糙度,以完成统计。密集光变曲线的丰富多幻影数据集补充了开普勒和TESS的数据。除了可见光范围内的数据外,我们还使用来自红外空间天文台(IRAS,Akari和WISE)的热数据,使用凸反演热物理模型(CITPM)进行组合优化。到目前为止,这种新的方法已被应用到只有少数目标,在这项工作中,我们进一步验证了该方法。我们给出了16个慢旋光体的模型。所有这些都能很好地拟合热数据和可见光数据。所获得的尺寸平均精确度为5%,直径范围为25至145公里。我们的目标的旋转周期范围从11到59小时,热惯性涵盖了从2到<400 SI单位的广泛值,没有显示出与周期的任何相关性。通过这项工作,我们增加了40%的样本的慢旋转与可靠的自旋和形状模型和已知的热惯性。我们的样品的热惯性值没有显示出先前建议的随旋转周期增加的趋势,这可能是由于它们的趋肤深度小。

英文摘要:

Results from the TESS mission showed that previous studies strngly underestimated the number of slow rotators, revealing the importance of studying those asteroids. For most slowly rotating asteroids (P > 12), no spin and shape model is available because of observation selection effects. This hampers determination of their thermal parameters and accurate sizes. We continue our campaign in minimising selection effects among main belt asteroids. Our targets are slow rotators with low light-curve amplitudes. The goal is to provide their scaled spin and shape models together with thermal inertia, albedo, and surface roughness to complete the statistics. Rich multi-apparition datasets of dense light curves are supplemented with data from Kepler and TESS. In addition to data in the visible range, we also use thermal data from infrared space observatories (IRAS, Akari and WISE) in a combined optimisation process using the Convex Inversion Thermophysical Model (CITPM). This novel method has so far been applied to only a few targets, and in this work we further validate the method. We present the models of 16 slow rotators. All provide good fits to both thermal and visible data. The obtained sizes are on average accurate at the 5% precision, with diameters in the range from 25 to 145 km. The rotation periods of our targets range from 11 to 59 hours, and the thermal inertia covers a wide range of values, from 2 to <400 SI units, not showing any correlation with the period. With this work we increase the sample of slow rotators with reliable spin and shape models and known thermal inertia by 40%. The thermal inertia values of our sample do not display a previously suggested increasing trend with rotation period, which might be due to their small skin depth.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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