Accretion-disc precession in UX Ursae Majoris

被引：17

作者：

de Miguel, E. ^{[1
,2
]}

Patterson, J. ^{[3
]}

Cejudo, D. ^{[4
]}

Ulowetz, J. ^{[5
]}

Jones, J. L. ^{[6
]}

Boardman, J. ^{[7
]}

Barret, D. ^{[8
]}

Koff, R. ^{[9
]}

Stein, W. ^{[10
]}

Campbell, T. ^{[11
]}

Vanmunster, T. ^{[12
]}

Menzies, K. ^{[13
]}

Slauson, D. ^{[14
]}

Goff, W. ^{[15
]}

Roberts, G. ^{[16
]}

Morelle, E. ^{[17
]}

Dvorak, S. ^{[18
]}

Hambsch, F. -J. ^{[19
]}

Starkey, D. ^{[20
]}

Collins, D. ^{[21
]}

Costello, M. ^{[22
]}

Cook, M. J. ^{[23
]}

Oksanen, A. ^{[24
]}

Lemay, D. ^{[25
]}

Cook, L. M. ^{[26
]}

Ogmen, Y. ^{[27
]}

Richmond, M. ^{[28
]}

Kemp, J. ^{[29
]}

机构：

[1] Univ Huelva, Dept Fis Aplicada, Fac Ciencias Expt, E-21071 Huelva, Spain

[2] Observ CIECEM, CBA Huelva, Parque Dunar, E-21760 Almonte, Huelva, Spain

[3] Columbia Univ, Dept Astron, 550 West 120th St, New York, NY 10027 USA

[4] CBA Madrid, Camino Canteras 42,Buzon 5, E-28192 Madrid, Spain

[5] Northbrook Meadow Observ, CBA Illinois, 855 Fair Lane, Northbrook, IL 60062 USA

[6] Jack Jones Observ, CBA Oregon, 22665 Bents Rd NE, Aurora, OR 97002 USA

[7] Luckydog Observ, CBA Wisconsin, 65027 Howath Rd, De Soto, WI 54624 USA

[8] CBA France, 6 Marouzeau, F-23300 St Leger Bridereix, France

[9] Antelope Hills Observ, CBA Colorado, 980 Antelope Dr West, Bennett, CO 80102 USA

[10] CBA Las Cruces, 6025 Calle Paraiso, Las Cruces, NM 88012 USA

[11] CBA Arkansas, 7021 Whispering Pine Rd, Harrison, AR 72601 USA

[12] CBA Belgium, Walhostr 1A, B-3401 Landen, Belgium

[13] CBA Massachusetts, 318A Potter Rd, Framingham, MA 01701 USA

[14] Owl Ridge Observ, CBA Iowa, 73 Summit Ave NE, Swisher, IA 52338 USA

[15] CBA Sutter Creek, 13508 Monitor Lane, Sutter Creek, CA 95685 USA

[16] CBA Tennessee, 2007 Cedarmont Dr, Franklin, TN 37067 USA

[17] CBA France, 9 Rue Vasco Gama, F-59553 Lauwin Planque, France

[18] Rolling Hills Observ, CBA Orlando, 1643 Nightfall Dr, Clermont, FL 34711 USA

[19] Andromeda Observ, CBA Mol, Oude Bleken 12, B-2400 Mol, Belgium

[20] DeKalb Observ H63, CBA Indiana, Auburn, IN 46706 USA

[21] Warren Wilson Coll, Coll View Observ, Asheville, NC 28778 USA

[22] CBA Fresno, 1125 East Holland Ave, Fresno, CA 93704 USA

[23] CBA Newcastle, 9 Laking Dr, Newcastle, ON L1B 1M5, Canada

[24] Hankasalmi Observ, CBA Finland, Verkkoniementie 30, FI-40950 Muurame, Finland

[25] CBA Quebec, 195 Rang 4 Ouest, St Anaclet, PQ G0K 1H0, Canada

[26] CBA Concord, 1730 Helix Court, Concord, CA 94518 USA

[27] Green Isl Observ B34, CBA Cyprus, CY-99610 Gecitkale, North Cyprus, Cyprus

[28] Rochester Inst Technol, Dept Phys, Rochester, NY 14623 USA

[29] Middlebury Coll, Dept Phys, Middlebury, VT 05753 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 457卷 / 02期

基金：

美国国家科学基金会;

关键词：

accretion; accretion discs; binaries: close; stars: individual: UX Ursae Majoris; novae; cataclysmic variables; HUBBLE-SPACE-TELESCOPE; RAPID BLUE VARIABLES; CATACLYSMIC VARIABLES; ECLIPSE OBSERVATIONS; SUPERHUMPS; OSCILLATIONS; BINARIES; PERIODS;

D O I：

10.1093/mnras/stv3014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the results of a long campaign of time series photometry on the nova-like variable UX Ursae Majoris during 2015. It spanned 150 nights, with similar to 1800 h of coverage on 121 separate nights. The star was in its normal 'high state' near magnitude V = 13, with slow waves in the light curve and eclipses every 4.72 h. Remarkably, the star also showed a nearly sinusoidal signal with a full amplitude of 0.44 mag and a period of 3.680 +/- 0.007 d. We interpret this as the signature of a retrograde precession (wobble) of the accretion disc. The same period is manifest as a +/- 33 s wobble in the timings of mid-eclipse, indicating that the disc's centre of light moves with this period. The star also showed strong 'negative superhumps' at frequencies omega(orb) + N and 2 omega(orb) + N, where omega(orb) and N are, respectively, the orbital and precession frequencies. It is possible that these powerful signals have been present, unsuspected, throughout the more than 60 yr of previous photometric studies.

引用

页码：1447 / 1455

页数：9

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