2002A&A...392..197M

Query : 2002A&A...392..197M

2002A&A...392..197M - Astronomy and Astrophysics, volume 392, 197-201 (2002/9-2)

The secondary minimum in YY Herculis: Evidence for a tidally distorted giant.

MIKOLAJEWSKA J., KOLOTILOV E.A., SHUGAROV S.Y. and YUDIN B.F.

Abstract (from CDS):

We present and analyze quiescent UBVRI light curves of the classical symbiotic binary YY Her. We show that the secondary minimum, which is clearly visible only in the quiescent VRI light curves, is due to ellipsoidal variability of the red giant component. Our simple light curve analysis, by fitting of the Fourier cosine series, resulted in a self-consistent phenomenological model of YY Her, in which the periodic changes can be described by a combination of the ellipsoidal changes and a sinusoidal changes of the nebular continuum and line emission.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: eclipsing - binaries: symbiotic - stars: fundamental parameters - stars: individual: YY Her

Simbad objects: 9

Full paper

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Number of rows : 9

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2023	#notes
1	V* AX Per	Sy*	01 36 22.7004366768	+54 15 02.411547480		11.45	10.67	11.04	M3IIIep+A0	286	1
2	NGC 2682	OpC	08 51 23.0	+11 48 50					~	2260	0
3	V* RW Hya	Sy*	13 34 18.1289607744	-25 22 48.881433972		11.51	10.00		M1/2IIIe	192	0
4	EM* AS 297	Sy*	18 14 34.1920736832	+20 59 21.189578820			11.10		M2pev	141	0
5	HD 168957	Be*	18 21 27.7696282416	+25 03 24.401761164	6.35	6.889	6.977		B3V	59	0
6	EM* MWC 603	Sy*	18 22 07.8548979216	+23 27 19.934869104		12.34	11.52		M3ep+O	115	0
7	EM* AS 338	Sy*	19 03 46.8372052248	+16 26 16.971438912					M5IIIe	91	2
8	V* BF Cyg	Sy*	19 23 53.5006095432	+29 40 29.177024952		10.52	9.30		Bep+M5III	271	0
9	V* CI Cyg	Sy*	19 50 11.8342618008	+35 41 03.004794996		11.97	9.90		M4.9III	416	0

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