2006MNRAS.368..637W

Query : 2006MNRAS.368..637W

2006MNRAS.368..637W - Mon. Not. R. Astron. Soc., 368, 637-650 (2006/May-2)

Roche tomography of cataclysmic variables - III. Star-spots on AE Aqr.

WATSON C.A., DHILLON V.S. and SHAHBAZ T.

Abstract (from CDS):

We present a Roche tomography reconstruction of the secondary star in the cataclysmic variable AE Aqr. The tomogram reveals several surface inhomogeneities that are due to the presence of large, cool star-spots. In addition to a number of lower latitude spots, the maps also show the presence of a large, high-latitude spot similar to that seen in Doppler images of rapidly rotating isolated stars, and a relative paucity of spots at a latitude of 40°. In total, we estimate that some 18 per cent of the Northern hemisphere of AE Aqr is spotted.

We have also applied the entropy landscape technique to determine accurate parameters for the binary system. We obtain optimal masses M1= 0.74M☉, M2= 0.50M☉, a systemic velocity γ = -63km/s and an orbital inclination i = 66°.

Given that this is the first study to successfully image star-spots on the secondary star in a cataclysmic variable, we discuss the role that further studies of this kind may play in our understanding of these binaries.


Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): techniques: spectroscopic - stars: imaging - stars: individual: AE Aqr - stars: late-type - novae, cataclysmic variables - stars: spots

CDS comments: In Chap. 8: BD +55 4409 is a misprint for BD +22 4409

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 166 BY* 00 06 36.7840068588 +29 01 17.412693890   6.82 6.07 5.6   G8V 392 0
2 * 34 Psc * 00 10 02.2030016064 +11 08 44.936910060   5.456 5.530   5.58 B9Vn 139 0
3 * 34 Psc B * 00 10 02.3863375176 +11 08 37.821568416     10.37     G5Ve 103 0
4 HD 19455 * 03 01 34.3325468640 -75 17 16.769905476   9.820 9.103     G8III 18 0
5 V* V484 Per BY* 03 22 21.9201012551 +49 08 27.732216837   12.07 11.37     G6V 78 0
6 V* V532 Per BY* 03 26 22.2275044296 +49 25 37.501937904   11.98 11.27     G2-3V 76 0
7 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1206 0
8 HD 24916 PM* 03 57 28.6990190160 -01 09 34.070478444 10.224 9.166 8.014 7.336 6.724 K4V 157 0
9 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 1080 0
10 V* LQ Hya BY* 09 32 25.5683895648 -11 11 04.692242760 9.316 8.761 7.891 7.288 6.815 K1Vp 480 0
11 V* EK Dra BY* 14 39 00.2104038120 +64 17 29.979649860   8.243 7.604     G5VFe-0.7CH-1(k) 500 0
12 V* V426 Oph CV* 18 07 51.6919772928 +05 51 47.804055084           ~ 182 0
13 V* AM Her CV* 18 16 13.2546725104 +49 52 04.759613537   15.124 14.808 13.525   M4.5-5Ve 1009 2
14 V* PZ Tel BY* 18 53 05.8735056984 -50 10 49.897437168   9.22 8.342   7.464 G9IV 364 0
15 V* AE Aqr CV* 20 40 09.1598959176 -00 52 15.055595220   12.46 10.40   10.191 K3-5IV/V 705 0
16 V* BO Mic BY* 20 47 45.0056152368 -36 35 40.769832192   10.39 9.337   8.216 K3V(e) 214 0
17 * 61 Cyg B PM* 21 06 55.2638444466 +38 44 31.358519864 8.63 7.40 6.03 4.86 3.55 K7V 765 0
18 BD+22 4409 BY* 21 31 01.7140062576 +23 20 07.374015564   10.240 9.245 8.6 7.965 K3Vke 187 0
19 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1
20 HD 208527 * 21 56 23.9843401776 +21 14 23.491655412 10.090 8.060 6.370     K5V 75 1
21 HD 208801 PM* 21 58 54.9854214456 -04 22 23.191421052   7.22 6.22     G8/K0III 104 1
22 HD 220074 * 23 20 14.3795474712 +61 58 12.460711368 10.070 8.070 6.400     K5 48 1
23 HD 223778 SB* 23 52 25.4091266714 +75 32 40.354906472   7.35 6.38 5.8   K3V 143 0
24 HD 224085 RS* 23 55 04.0520383542 +28 38 01.245426862 8.88 8.20   6.9   K2+IVeFe-1 756 0

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