Discovery of superslow rotating asteroids with ATLAS and ZTF photometry

被引：13
作者：
Erasmus, N. [1 ]
Kramer, D. [2 ,3 ]
McNeill, A. [3 ]
Trilling, D. E. [1 ,3 ]
van Rensburg, P. Janse [1 ,4 ]
van Belle, G. T. [5 ]
Tonry, J. L. [6 ]
Denneau, L. [6 ]
Heinze, A. [6 ]
Weiland, H. J. [6 ]
机构：
[1] South African Astron Observ, ZA-7925 Cape Town, South Africa
[2] No Arizona Univ, Sch Informat Comp & Cyber Syst, Flagstaff, AZ 86011 USA
[3] No Arizona Univ, Dept Astron & Planetary Sci, Flagstaff, AZ 86011 USA
[4] Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa
[5] Lowell Observ, Flagstaff, AZ 86001 USA
[6] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 506卷 / 03期
基金：
美国国家航空航天局; 美国国家科学基金会; 新加坡国家研究基金会;
关键词：
minor planets; asteroids: general; MAIN-BELT; OBJECTS;
D O I：
10.1093/mnras/stab1888
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present here the discovery of a new class of superslow rotating asteroids (P-rot greater than or similar to 1000 h) in data extracted from the Asteroid Terrestrial-impact Last Alert System (ATLAS) and Zwicky Transient Facility (ZTF) all-sky surveys. Of the 39 rotation periods we report here, 32 have periods longer than any previously reported unambiguous rotation periods currently in the Asteroid Light Curve Data base. In our sample, seven objects have a rotation period >4000 h and the longest period we report here is 4812 h (similar to 200 d). We do not observe any correlation between taxonomy, albedo, or orbital properties with superslow rotating status. The most plausible mechanism for the creation of these very slow rotators is if their rotations were slowed by YORP spin-down. Superslow rotating asteroids may be common, with at least 0.4 per cent of the main-belt asteroid population with a size range between 2 and 20 km in diameter rotating with periods longer than 1000 h.
引用
收藏
页码：3872 / 3881
页数：10
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