Статья

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

William HerbstAstronomy Department, Wesleyan University, Middletown, CT 06459Catrina M. HamiltonAstronomy Department, Wesleyan University, Middletown, CT 06459Frederick J. VrbaUS Naval Observatory, Flagstaff Station, Box 1149, Flagstaff, AZ 86002‐1149Mansur A. IbrahimovUlugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Astronomicheskaya 33, 700052 Tashkent, UzbekistanCoryn A. L. Bailer‐JonesMax‐Planck‐Institut für Astronomie, Königstuhl 17, D‐69117 Heidelberg, GermanyReinhard MundtMax‐Planck‐Institut für Astronomie, Königstuhl 17, D‐69117 Heidelberg, GermanyMarkus LammMax‐Planck‐Institut für Astronomie, Königstuhl 17, D‐69117 Heidelberg, GermanyTsevi MazehSchool of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, IsraelZodiac T. WebsterAstronomy Department, 601 Campbell Hall, University of California, Berkeley, CA 94720‐3411Karl E. HaischNASA Ames Research Center, Mail Stop 245‐6, Moffett Field, CA 94035‐1000Eric C. WilliamsAstronomy Department, Wesleyan University, Middletown, CT 06459Andrew H. RhodesAstronomy Department, Wesleyan University, Middletown, CT 06459Thomas J. BalonekDepartment of Physics and Astronomy, Colgate University, 13 Oak Drive, Hamilton, NY 13346‐1398Alexander ScholzThüringer Landessternwarte Tautenburg, Sternwarte 5, D‐07778 Tautenburg, GermanyArno RiffeserUniversitäts‐Sternwarte München, Scheinerstrasse 1, D‐81679 Munich, Germany

Publications of the Astronomical Society of the Pacificjournal2002en

ABI

Аннотация

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 d. 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.

Темы

Stellar, planetary, and galactic studies Astronomy and Astrophysical Research Astrophysics and Star Formation Studies

Идентификаторы

DOI: 10.1086/344205

Цитирования и источники

Цитирований: 3 Использованных источников: 17

Показатели — AkademScholar · Скоро