MASS TRANSFER VARIATIONS IN UX MONOCEROTIS: EIGHT YEARS OF AUTOMATED PHOTOMETRIC MONITORING

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/138/5/1435; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21301550

Olson, Edward C ^[1]; Henry, Gregory W ^[2]

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1. Astronomy Department, University of Illinois, 1002 W. Green St., Urbana, Illinois 61801-3074 (United States)
2. Tennessee State University, Center of Excellence in Information Systems, 3500 John A. Merritt Blvd., Box 9501, Nashville, TN 37209 (United States)

We analyze eight years (1999-2007) of automated photometric observations of the active Algol binary UX Monocerotis to search for mass transfer bursts similar to those seen in U Cephei. The largest photometric anomaly is the mean gainer luminosity difference between the stream-impact hemisphere and the opposite hemisphere. We find an updated Wilson-Devinney solution for earlier six-color observations. The UX Mon donor star fills its Roche lobe and the gainer nearly fills its rotational lobe. Instead of isolated bursts of the U Cep type, we found nearly continuous brightness fluctuations likely produced by variable mass transfer. We discuss implications for mass transfer.

• OSTI ID: 21301550
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 138, Issue 5; Other Information: DOI: 10.1088/0004-6256/138/5/1435; Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
BRIGHTNESS
LUMINOSITY
MASS TRANSFER
ROCHE EQUIPOTENTIALS
STARS