2005ApJ...632L.123H

Query : 2005ApJ...632L.123H

2005ApJ...632L.123H - Astrophys. J., 632, L123-L126 (2005/October-3)

Why are the secondary stars in polars so normal?

HARRISON T.E., HOWELL S.B., SZKODY P. and CORDOVA F.A.

Abstract (from CDS):

We have used NIRSPEC on Keck II to obtain K-band spectroscopy of several magnetic cataclysmic variables. These data reveal that the secondary stars in these binary systems have spectra that are consistent with normal, late-type dwarfs in both their atomic and molecular line strengths, as well as in the slopes of their continua. This result is in stark contrast to the infrared spectra of their nonmagnetic cousins, nearly all of which show peculiar abundances, especially of CNO species and their isotopes. It appears that the evolutionary path taken by the secondary stars in magnetic systems differs from that for the nonmagnetic systems. We discuss the implications of this result.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Close - Stars: Magnetic Fields

Simbad objects: 17

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Number of rows : 17
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 V* BY Cam CV* 05 42 48.8013535344 +60 51 31.376128608   16.60       ~ 270 0
2 V* BT Mon No* 06 43 47.2416090432 -02 01 13.876883184   15.737 14.638 15.411   G8V 183 0
3 V* CP Pup No* 08 11 46.0634106720 -35 21 04.986480708   15.436 15.227     ~ 277 1
4 V* VV Pup CV* 08 15 06.8009599464 -19 03 17.765706024     13.90     M7V 413 0
5 V* S Cnc SB* 08 43 56.1367272336 +19 02 03.038805888   8.44 8.35     B9/A0V+K:III 187 0
6 V* BZ UMa CV* 08 53 44.1735972456 +57 48 40.593710304   15.95 17.58 14.98 15.38 M5.5:Ve 164 0
7 V* ST LMi CV* 11 05 39.7664319408 +25 06 28.746723096   16.832 16.524 15.639   DAH+M 228 0
8 V* TT Hya SB* 11 13 12.4976326464 -26 27 54.253972800   7.43 7.31     F0IV:kA2mA3:_sh 193 0
9 V* AR UMa CV* 11 15 44.5891034908 +42 58 22.431026739     16.4     O9I 154 0
10 V* GQ Mus No* 11 52 02.4296561952 -67 12 20.986391520           ~ 271 0
11 PG 1550+191 CV* 15 52 47.1968971224 +18 56 28.844471472   16.4 15.46 17.0   M6.5Ve 202 0
12 V* MQ Dra CV* 15 53 31.1198078328 +55 16 14.475178272     17.35     M5Ve 57 0
13 V* V2214 Oph No* 17 12 01.6941423448 -29 37 32.782241938           ~ 87 0
14 V* V2487 Oph No* 17 31 59.805 -19 13 56.13   18.0       ~ 136 0
15 V* DQ Her CV* 18 07 30.2510391864 +45 51 32.564791872   14.605 14.443 14.800   M3+Ve 1048 1
16 V* V1500 Cyg No* 21 11 36.5809818696 +48 09 01.952490204           ~ 820 0
17 V* IP Peg CV* 23 23 08.5362249504 +18 24 59.206884012           M2 395 0

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