Details

Autor(en) / Beteiligte

• Herbst, William
• Hamilton, Catrina M.
• Vrba, Frederick J.
• Ibrahimov, Mansur A.
• Bailer‐Jones, Coryn A. L.
• Mundt, Reinhard
• Lamm, Markus
• Mazeh, Tsevi
• Webster, Zodiac T.
• Haisch, Karl E.
• Williams, Eric C.
• Rhodes, Andrew H.
• Balonek, Thomas J.
• Scholz, Alexander
• Riffeser, Arno

Titel

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

Ist Teil von

• Publications of the Astronomical Society of the Pacific, 2002-11, Vol.114 (801), p.1167-1172

Ort / Verlag

The University of Chicago Press

Erscheinungsjahr

2002

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Results of an international campaign to photometrically monitor the unique pre–main‐sequence eclipsing object KH 15D are reported. An updated ephemeris for the eclipse is derived that incorporates a slightly revised period of 48.36 days. 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) and duration (∼18 days) of the eclipse indicate that it is caused by circumstellar matter, presumably the inner portion of a disk. The eclipse has continued to lengthen with time, and the central brightness reversals are not as extreme as they once were.V−RandV−Icolors indicate that the system is slightly bluer near minimum light. Ingress and egress are remarkably well modeled by the passage of a knife edge across a limb‐darkened star. Possible models for the system are briefly discussed.