2012AJ....144..141Z

Query : 2012AJ....144..141Z

2012AJ....144..141Z - Astron. J., 144, 141 (2012/November-0)

A probable hybrid γ Dor-δ Scuti variable discovered in the open cluster NGC 2126.

ZHANG X.B., DENG L.C. and LUO C.Q.

Abstract (from CDS):

We have carried out high-precision B- and V-band time-series CCD photometry to investigate the physical nature of an oscillating EA-type binary system in the intermediate-age open cluster NGC 2126. Analysis of the light variability for about 500 stars in this field has led to the discovery of three new variables, two pulsating stars and one EA-type eclipsing binary. One of the former, GSC3382-0957, a probable cluster member, is shown to have both p- and g-mode pulsations. A frequency analysis reveals two confident pulsating modes at f1= 14.835 c/d and f2= 1.812 c/d from both the B- and V-band data. In the color-magnitude diagram, the star is located at the lower edge of the δ Scuti instability strip, where the δ Sct and γ Dor stars overlap. It is suggested that this is a probable hybrid γ Dor-δ Sct star.

Abstract Copyright: ∼

Journal keyword(s): open clusters and associations: individual: NGC 2126 - stars: individual: GSC3382-0957 - stars: oscillations - stars: variables: delta Scuti

Nomenclature: Fig. 1, Table 1: [ZDL2012] ZVN (Nos ZV1-ZV3).

CDS comments: GSC3382-0957 is a misprint for GSC3382-0937. NGC 2116 is a misprint for NGC 2126. Table 1: wrong coordinates for ZV1, read 06 02 33.07 +49 52 47.7 instead.

Simbad objects: 15

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Number of rows : 15
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* V529 And gD* 01 27 26.6728869648 +41 06 04.177819368   6.711 6.425     A7m 89 0
2 V* V546 Aur gD* 06 01 44.1436864128 +49 56 30.371534268   14.46 13.91 13.89   ~ 12 0
3 V* V547 Aur gD* 06 01 57.4129990944 +49 58 54.805070964   14.96 14.41 14.28   ~ 6 0
4 V* V548 Aur dS* 06 02 05.2743893736 +49 49 11.269176348   15.87 15.31 15.20   ~ 6 0
5 UCAC4 700-043174 EB* 06 02 20.4378014328 +49 48 23.524219800   16.24 15.40 15.14   ~ 8 0
6 V* V549 Aur EB* 06 02 21.3312548016 +49 52 37.155802332     15.90 15.62   ~ 11 0
7 GSC 03382-00937 * 06 02 21.7411772400 +49 52 23.469323988   14.07 13.57 13.42   ~ 7 1
8 V* V550 Aur dS* 06 02 26.4301135416 +49 51 56.518823592   13.48 12.95 12.91   ~ 11 0
9 UCAC4 700-043212 dS* 06 02 33.0586137552 +49 52 47.633003364   13.76 13.19 13.13   ~ 7 0
10 NGC 2126 OpC 06 02 36.9 +49 53 26           ~ 51 0
11 V* V551 Aur EB* 06 02 38.0440795968 +49 53 02.470326828   15.11 14.27 14.30   F 17 0
12 HD 44195 dS* 06 20 42.7376093592 +05 16 42.115124892   7.84 7.54     F0 31 0
13 HD 49434 gD* 06 48 19.0662941232 -01 19 08.124232296   6.015 5.731     F0V+ 98 0
14 HD 114389 * 13 10 50.9335150032 -42 46 19.270784964   10.39 10.07     A9IV/V 6 0
15 BD+18 4914 dS* 22 02 37.6965551808 +18 54 02.626783740   11.16 10.63     F5 22 0

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