Fine Structure in the Circumstellar Environment of a Young, Solar‐like Star: The Unique Eclipses of KH 15D | Zendy

W. Herbst | Zendy; Catrina M. Hamilton | Zendy; F. J. Vrba | Zendy; M. Ibrahimov | Zendy; Coryn A. L. BailerJones | Zendy; R. Mundt | Zendy; M. Lamm | Zendy; T. Mazeh | Zendy; Zodiac T. Webster | Zendy; Karl E. Haisch | Zendy; Eric Williams | Zendy; A. Rhodes | Zendy; T. J. Balonek | Zendy; A. Scholz | Zendy; Arno Riffeser | Zendy

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Fine Structure in the Circumstellar Environment of a Young, Solar‐like Star: The Unique Eclipses of KH 15D

Author(s) -

W. Herbst,

Catrina M. Hamilton,

F. J. Vrba,

M. Ibrahimov,

Coryn A. L. BailerJones,

R. Mundt,

M. Lamm,

T. Mazeh,

Zodiac T. Webster,

Karl E. Haisch,

Eric Williams,

A. Rhodes,

T. J. Balonek,

A. Scholz,

Arno Riffeser

Publication year - 2002

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/344205

Subject(s) - eclipse , ephemeris , physics , astrophysics , astronomy , solar eclipse , brightness , orbital period , star (game theory) , circumstellar disk , stars , satellite

Results of an international campaign to photometrically monitor the uniquepre-main sequence eclipsing object KH 15D are reported. An updated ephemerisfor the eclipse is derived that incorporates a slightly revised period of 48.36d. There is some evidence that the orbital period is actually twice that value,with two eclipses occurring per cycle. The extraordinary depth (~3.5 mag) andduration (~18 days) of the eclipse indicate that it is caused by circumstellarmatter, presumably the inner portion of a disk. The eclipse has continued tolengthen with time and the central brightness reversals are not as extreme asthey once were. V-R and V-I colors indicate that the system is slightly bluernear minimum light. Ingress and egress are remarkably well modeled by thepassage of a knife-edge across a limb-darkened star. Possible models for thesystem are briefly discussed.Comment: 19 pages, 5 figure

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