2012JAVSO..40..268H

Query : 2012JAVSO..40..268H

2012JAVSO..40..268H - J. Am. Assoc. Variable star obs., 40, 268 (2012/June-0)

Secular variation of the mode amplitude-ratio of the double-mode RR Lyrae star NSVS 5222076, part II.

HURDIS D.A. and KRAJCI T.

Abstract (from CDS):

We present results from our ongoing investigation of the double-mode RR Lyrae (RRd) star, NSVS 5222076, and specifically of the long-term temporal variation of the amplitude-ratio, A0/A1, of the star's fundamental and first-overtone pulsation modes. Our earlier paper on this subject (Hurdis and Krajci 2010) described a seemingly monotonic decrease of the amplitude-ratio in the V band, from 1.93 in 2005 to 1.76 in 2008 to 1.48 in 2009. After further observation of the star during the 2010 and 2011 observing seasons, we report that the V-band amplitude-ratio continued to decrease to 1.40 in 2010, but then increased to 1.82 in 2011. This suggests that, rather than decreasing monotonically toward a switch of dominant pulsation mode, A0/A1 may be varying in an oscillatory manner.

Abstract Copyright: ∼

Journal keyword(s):

Simbad objects: 1

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Number of rows : 1

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* V338 Boo	RR*	15 46 26.1422205480	+44 18 47.172522024		12.76	13.00			~	17	0

Query : 2012JAVSO..40..268H

Basic data :

V* V338 Boo -- RR Lyrae Variable

* (GSC,NSVS,...), RR* (2006AJ), Pu* (2018AJ), V* (V*), blu (2021A&A), NIR (2MASS), Opt (ATO)

15 46 26.1422205480 +44 18 47.172522024 (Optical) [ 0.0125 0.0135 90 ] A 2020yCat.1350....0G

15 44 46.8623753470 +44 28 02.380658831 [ 0.0125 0.0135 90 ]

070.8931805120391 +51.1287119351107 [ 0.0125 0.0135 90 ]

-4.234 -15.474 [0.016 0.018 90] A 2020yCat.1350....0G

V(km/s) -246.06 [3.53] / z(spectroscopic) -0.000820 [0.000012] / cz -245.96 [3.53] (Opt) C 2022yCat.1355....0G

0.3258 [0.0149] A 2020yCat.1350....0G

B 12.76 [~] E ~

V 13.00 [~] V3 D 2006AJ....132.1202K

G 12.860315 [0.009110] C 2020yCat.1350....0G

J 12.152 [0.023] C 2003yCat.2246....0C

H 11.97 [0.03] C 2003yCat.2246....0C

K 11.939 [0.022] C 2003yCat.2246....0C

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`GSC 03059-00636`	`NSVS 5222076`	`UCAC2 46957957`	`Gaia DR3 1396625374982001280`
`ATO J236.6089+44.3130`	`NSVS 5173050`	*`V V338 Boo`**
`2MASS J15462613+4418471`	`TIC 282941520`	`Gaia DR2 1396625374982001280`

References (17 between 1850 and 2026) (Total 17)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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`GSC 03059-00636`	`2MASS J15462613+4418471`	`UCAC2 46957957`	*`V V338 Boo`**	`Gaia DR2 1396625374982001280`
`Gaia DR3 1396625374982001280`

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