Investigating the Low-flux States in Six Intermediate Polars

被引：13

作者：

Covington, Ava E. ^{[1
]}

Shaw, Aarran W. ^{[1
]}

Mukai, Koji ^{[2
,3
,4
]}

Littlefield, Colin ^{[5
,6
,7
]}

Heinke, Craig O. ^{[8
]}

Plotkin, Richard M. ^{[1
]}

Barrett, Doug ^{[9
,10
]}

Boardman, James ^{[9
,11
]}

Boyd, David ^{[9
,12
,13
]}

Brincat, Stephen M. ^{[9
,14
]}

Carstens, Rolf ^{[9
,15
,16
]}

Collins, Donald F. ^{[9
,17
]}

Cook, Lewis M. ^{[9
]}

Cooney, Walter R. ^{[9
,18
]}

Fernandez, David Cejudo ^{[9
,19
]}

Dufoer, Sjoerd ^{[9
,20
]}

Dvorak, Shawn ^{[9
,21
]}

Galdies, Charles ^{[9
,22
]}

Goff, William ^{[9
]}

Hambsch, Franz-Josef ^{[9
,20
,23
,24
]}

Johnston, Steve ^{[9
,12
]}

Jones, Jim ^{[9
,25
]}

Menzies, Kenneth ^{[9
,26
]}

Monard, Libert A. G. ^{[9
,27
,28
]}

Morelle, Etienne ^{[9
,29
]}

Nelson, Peter ^{[9
,30
]}

Ogmen, Yenal ^{[9
,31
]}

Rock, John W. ^{[9
,32
]}

Sabo, Richard ^{[9
,33
]}

Seargeant, Jim ^{[9
,34
]}

Stone, Geoffrey ^{[9
,35
]}

Ulowetz, Joseph ^{[9
,36
]}

Vanmunster, Tonny ^{[9
,37
,38
]}

机构：

[1] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[2] NASA, CRESST, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[3] NASA, Xray Astrophys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[4] Univ Maryland Baltimore Cty, Dept Phys, 1000 Hilltop Circle, Baltimore, MD 21250 USA

[5] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[6] Univ Washington, Dept Astron, Seattle, WA 98195 USA

[7] Bay Area Environm Res Inst, Moffett Field, CA 94035 USA

[8] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada

[9] Amer Assoc Variable Star Observers, 49 Bay State Rd, Cambridge, MA 02138 USA

[10] Observ Marouzeau, F-23300 Creuse, France

[11] Luckydog Observ, 65012 Howath Rd, De Soto, WI 54624 USA

[12] British Astron Assoc, Variable Star Sect, Burlington House, London W1J 0DU, England

[13] West Challow Observ, West Challow OX12 9TX, England

[14] Flarestar Observ, MPC 171,Fl 5-B,George Tayar St, San Gwann 3160, Sgn, Malta

[15] Geyserland Observ E89, 120 Homedale St, Rotorua 3015, New Zealand

[16] Royal Astron Soc New Zealand, POB 3181, Wellington, New Zealand

[17] Warren Wilson Coll, 701 Warren Wilson Rd, Swannanoa, NC 28778 USA

[18] Starry Night Observ, Columbus, TX USA

[19] Observ El Gallinero, Madrid, Spain

[20] Vereniging Sterrenkunde VVS, Oostmeers 122 C, B-8000 Brugge, Belgium

[21] Rolling Hills Observ, Clermont, FL USA

[22] Univ Malta, Inst Earth Syst, Msida, Malta

[23] Bundesdeutsch Arbeitsgemeinschaft Veranderliche, Munsterdamm 90, D-12169 Berlin, Germany

[24] Grp Europ Observat Stellaires GEOS, 23 Parc Levesville, F-28300 Bailleau Leveque, France

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

[26] Tigh Speuran Observ, Framingham, MA 01701 USA

[27] CBA Pretoria, Bronberg Observ, POB 11426, ZA-0056 Tiegerpoort, South Africa

[28] Kleinkaroo Observ, St Helena 1B,POB 281, ZA-6660 Calitzdorp, Western Cape, South Africa

[29] Observ Sirene, F-84400 Lagarde Dapt, France

[30] Ellinbank Observ, Mt Burnett, Vic, Australia

[31] Green Isl Observ, Gecitkale Magusa, North Cyprus, Turkey

[32] CBA Highworth Observ, Highworth SN6 7PJ, Wilts, England

[33] 1344 Post Dr, Bozeman, MT 59715 USA

[34] Albuquerque Astron Soc, POB 50581, Albuquerque, NM 87181 USA

[35] First Light Observ Syst, Corvallis, OR USA

[36] Ctr Backyard Astrophys, 855 Fair Lane, Northbrook, IL 60062 USA

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

[38] CBA Extremadura Observ, E-06340 Badajoz, Spain

来源：

ASTROPHYSICAL JOURNAL | 2022年 / 928卷 / 02期

关键词：

CATACLYSMIC VARIABLES; WHITE-DWARFS; SPIN-PERIOD; RAPID OSCILLATIONS; ACCRETION FLOWS; DW-CANCRI; TX COL; IDENTIFICATION; EVOLUTION; STAR;

D O I：

10.3847/1538-4357/ac5682

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present optical photometry of six intermediate polars that exhibit transitions to a low-flux state. For four of these systems, DW Cnc, V515 And, V1223 Sgr, and RX J2133.7+5107, we are able to perform timing analysis in and out of the low states. We find that, for DW Cnc and V515 And, the dominant periodicities in the light curves change as the flux decreases, indicating a change in the sources' accretion properties as they transition to the low state. For V1223 Sgr, we find that the variability is almost completely quenched at the lowest flux, but we do not find evidence for a changing accretion geometry. For RX J2133.7+5107, the temporal properties do not change in the low state, but we do see a period of enhanced accretion that is coincident with increased variability on the beat frequency, which we do not associate with a change in the accretion mechanisms in the system.

引用

页数：14

共 80 条

[1]

Andronov I. L., 2018, Res. Notes Am. Astron. Soc, V2, P197, DOI 10.3847/2515-5172/aaeb8b

[2]

Andronov I.L., 2014, ATEL, V5944

[3] Accretion disks in interacting binaries: Simulations of the stream-disk impact [J].