Autor(en)
Szabó, Gy. M; Pál, A; Kiss, Cs; Kiss, L. L; Molnár, L; Hanyecz, O; Plachy, E; Sárneczky, K; Szabó, R
Titel
The heart of the swarm: K2 photometry and rotational characteristics of 56 Jovian Trojan asteroids
Teil von
  • Astronomy and astrophysics (Berlin), 2017, Vol.599, p.A44
Ort / Verlag
LES ULIS CEDEX A: EDP Sciences
Links zum Volltext
Quelle
Web of Science
Beschreibungen
We present fully covered phased light curves for 56 Jovian Trojan asteroids as observed by the K2 mission of the Kepler space telescope. This set of objects has been monitored during Campaign 6 and represents a nearly unbiased subsample of the population of small solar system bodies. We derived precise periods and amplitudes for all Trojans, and found their distributions to be compatible with the previous statistics. We point out, however, that ground-based rotation periods are often unreliable above 20 h, and we find an overabundance of rotation periods above 60 h compared with other minor planet populations. From amplitude analysis we derive a rate of binarity of 20 ± 5%. Our spin rate distribution confirms the previously obtained spin barrier of ~5 h and the corresponding ~0.5 g cm-3 cometary-like density limit, also suggesting a high internal porosity for Jovian Trojans. One of our targets, asteroid 65227 exhibits a double rotation period, which can either be due to binarity or the outcome of a recent collision.
Format
Sprache(n)
Englisch
Identifikator(en)
ISSN: 0004-6361
ISSN: 1432-0746
ISSN: 1432-0746
DOI: 10.1051/0004-6361/201629401
Links zum Inhalt
Schlagwörter
asteroids: general, Astronomy & Astrophysics, minor planets, Physical Sciences, Science & Technology
Systemstelle
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