TY - JOUR
T1 - Fine structure in the circumstellar environment of a young, solar-like star
T2 - The unique eclipses of KH 15D
AU - Herbst, William
AU - Hamilton, Catrina M.
AU - Vrba, Frederick J.
AU - Ibrahimov, Mansur A.
AU - Bailer-Jones, Coryn A.L.
AU - Mundt, Reinhard
AU - Lamm, Markus
AU - Mazeh, Tsevi
AU - Webster, Zodiac T.
AU - Haisch, Karl E.
AU - Williams, Eric C.
AU - Rhodes, Andrew H.
AU - Balonek, Thomas J.
AU - Scholz, Alexander
AU - Riffeser, Arno
PY - 2002
Y1 - 2002
N2 - 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-R and V-I colors 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.
AB - 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-R and V-I colors 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.
UR - http://www.scopus.com/inward/record.url?scp=0036439287&partnerID=8YFLogxK
U2 - 10.1086/344205
DO - 10.1086/344205
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AN - SCOPUS:0036439287
SN - 0004-6280
VL - 114
SP - 1167
EP - 1172
JO - Publications of the Astronomical Society of the Pacific
JF - Publications of the Astronomical Society of the Pacific
IS - 801
ER -