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The History of the Mysterious Eclipses of KH 15D. II. Asiago, Kiso, Kitt Peak, Mount Wilson, Palomar, Tautenburg, and Rozhen Observatories, 1954-1997

Johnson, John Asher and Winn, Joshua N. and Rampazzi, Francesca and Barbieri, Cesare and Mito, Hiroyuki and Tarusawa, Ken-ichi and Tsvetkov, Milcho and Borisova, Ana and Meusinger, Helmut (2005) The History of the Mysterious Eclipses of KH 15D. II. Asiago, Kiso, Kitt Peak, Mount Wilson, Palomar, Tautenburg, and Rozhen Observatories, 1954-1997. Astronomical Journal, 129 (4). pp. 1978-1984. ISSN 0004-6256. doi:10.1086/428597. https://resolver.caltech.edu/CaltechAUTHORS:20130123-111141537

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Abstract

The unusual pre–main-sequence binary star KH 15D undergoes remarkably deep and long-lasting periodic eclipses. Some clues about the reason for these eclipses have come from the observed evolution of the system's light curve over the last century. Here we present UBVRI photometry of KH 15D from 1954 to 1997 based on photographic plates from various observatories. The system has been variable at the ≈1 mag level since at least 1965. There is no evidence of color variations, with a typical limit of Δ(B - V) < 0.2 mag. We confirm some previously published results that were based on a smaller sample of plates: from approximately 1965 to 1990, the total flux was modulated with the 48 day orbital period of the binary, but the maximum flux was larger, the fractional variations were smaller, and the phase of minimum flux was shifted by almost a half-cycle relative to the modern light curve. All these results are consistent with the recently proposed theory that KH 15D is being occulted by an inclined, precessing, circumbinary ring.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/428597DOIArticle
http://iopscience.iop.org/1538-3881/129/4/1978/PublisherArticle
ORCID:
AuthorORCID
Johnson, John Asher0000-0001-9808-7172
Winn, Joshua N.0000-0002-4265-047X
Additional Information:© 2005 American Astronomical Society. Receivved 2004 October 18; accepted 2005 January 5. We are indebted to Paolo Maffei, Gino Totsi, Yoshikazu Nakada, George Carlson, Steve Strom, Bill Schoening, Jean Mueller, Tony Misch, Peter Quinn, and Dave Monet for their kind assistance with the plate archives.We have enjoyed helpful conversations with Catrina Hamilton, Bill Herbst, Matt Holman, Geoff Marcy, and Fred Vrba about this work. M. Bagaglia is to be thanked for the digitization of part of the plates obtained by P. Maffei. We also thank Erin Johnson for assistance with the chromatic analysis and Liliana Lopez for help with the visual inspection of the Mount Wilson plates. This work makes use of data from the digitized Italian photographic archives, produced under contract MIUR/COFIN 2002 to C. Barbieri, Department of Astronomy, University of Padova. J. N. W. is supported by NASA through Hubble Fellowship grant HST HF-01180.02-A, awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA under contract NAS 5-26555. M. T. acknowledges support from COST Action-283 and grant BNSF I-1103/2001 of the Bulgarian Ministry of Education and Science.
Funders:
Funding AgencyGrant Number
NASA Hubble FellowshipHST-HF-01180.02-A
NASANAS 5-26555
COST Action-283UNSPECIFIED
Ministry of Education and Science (Bulgaria)BNSF I-1103/2001
Subject Keywords:circumstellar matter; stars: individual (KH 15D); stars: pre-main sequence; techniques: photometric
Issue or Number:4
DOI:10.1086/428597
Record Number:CaltechAUTHORS:20130123-111141537
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130123-111141537
Official Citation:The History of the Mysterious Eclipses of KH 15D. II. Asiago, Kiso, Kitt Peak, Mount Wilson, Palomar, Tautenburg, and Rozhen Observatories, 1954-1997 John Asher Johnson et al. 2005 The Astronomical Journal 129 1978
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36535
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:23 Jan 2013 21:51
Last Modified:09 Nov 2021 23:22

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