2002ApJ...575..461E

Query : 2002ApJ...575..461E

2002ApJ...575..461E - Astrophys. J., 575, 461-473 (2002/August-2)

The evolution of cool algols.

EGGLETON P.P. and KISELEVA-EGGLETON L.

Abstract (from CDS):

We apply a model of dynamo-driven mass loss, magnetic braking, and tidal friction to the evolution of stars with cool convective envelopes; in particular, we apply it to binary stars where the combination of magnetic braking and tidal friction can cause angular momentum loss from the orbit. For the present we consider the simplification that only one component of a binary is subject to these nonconservative effects, but we emphasize the need in some circumstances to permit such effects in both components.The model is applied to examples of (1) the Sun, (2) BY Dra binaries, (3) Am binaries, (4) RS CVn binaries, (5) Algols, and (6) post-Algols. A number of problems regarding some of these systems appear to find a natural explanation in our model. There are indications from other systems that some coefficients in our model may vary by a factor of 2 or so from system to system; this may be a result of the chaotic nature of dynamo activity.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Evolution - Stars: Magnetic Fields - Stars: Mass Loss

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 * tet Tuc dS* 00 33 23.3592313752 -71 15 58.480429176   6.359 6.109     A7IV 99 0
2 * 39 Cet RS* 01 16 36.2879453688 -02 30 01.328624496   6.310 5.428     G6III:eFe-2 269 0
3 V* AS Eri SB* 03 32 25.1263057224 -03 18 48.095135748   8.49 8.30     A3V+K0III 177 0
4 V* RZ Eri RS* 04 43 45.8302005168 -10 40 56.016683040   8.530 7.88     kF1hF5mF5IVEuSrBa 187 0
5 HD 269696 HS* 05 31 40.3594532592 -69 53 02.153902236 9.74 10.92 11.15     sdB+dM 202 0
6 V* DN Ori SB* 06 00 28.3452565224 +10 13 05.008608156   9.40 9.15     B9IV_sh 80 0
7 NGC 2346 PN 07 09 22.5215800440 -00 48 23.610997332   11.76 11.58     A5V 592 0
8 V* R CMa SB* 07 19 28.1785241208 -16 23 42.895279824 6.09 6.05 5.70     F2III/IV 290 0
9 V* AR Mon RS* 07 20 48.4542865200 -05 15 35.796949272   9.84 8.79   7.608 G6IV 176 0
10 V* YY Gem SB* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 882 0
11 V* RZ Cnc RS* 08 39 08.5400165016 +31 47 44.455494084   10.17 8.67     K2III 171 0
12 V* S Cnc SB* 08 43 56.1367272336 +19 02 03.038805888   8.44 8.35     B9/A0V+K:III 187 0
13 WG 15 WD* 09 58 54.9418463856 -66 53 10.179562092   14.40 14.60     DA1.8 65 0
14 V* RW UMa RS* 11 40 46.3524031800 +51 59 53.418567660   10.77 10.22     F8 125 0
15 V* RS CVn RS* 13 10 36.9077924448 +35 56 05.584994412 8.57 8.51 7.93 7.7   F6IV+G8IV 753 0
16 V* DL Vir SB* 13 52 38.8080754200 -18 42 32.472530388   7.61 6.99     A2V+F6:III 104 0
17 V* DE Lib RR* 15 46 52.2291624840 -20 37 26.318040384     13.78     ~ 15 0
18 V* V907 Sco SB* 17 56 55.5622524456 -34 45 01.218496968   8.75 8.63     B9V 56 0
19 V* Z Her RS* 17 58 06.9789710832 +15 08 21.908719500   7.86 7.30     F8V 294 0
20 V* BY Dra BY* 18 33 55.7720712062 +51 43 08.897780286 10.22 9.23   8.733   K4Ve+K7.5Ve 639 0
21 HD 185510 RS* 19 39 38.8187091672 -06 03 49.460337108   9.44 8.235   6.967 K0III+sdB 119 0
22 V* FF Aqr EB* 22 00 36.4255860432 -02 44 26.868642108   10.23 9.408   8.245 G8III+sdO 122 0
23 V* RT Lac RS* 22 01 30.7406691720 +43 53 25.643931396   10.092 8.84     G9+K1IVIV 278 0
24 V* SS Lac SB* 22 04 41.5514288040 +46 25 38.110644768   10.262 10.128 10.127   A2V+A2V 97 0

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