J/MNRAS/422/89 Cetus dSph RR Lyrae (Monelli+, 2012)
Variable stars in the Cetus dwarf spheroidal galaxy: population gradients and
connections with the star formation history.
Monelli M., Bernard E.J., Gallart C., Fiorentino G., Drozdovsky I.,
Aparicio A., Bono G., Cassisi S., Skillman E.D., Stetson P.B.
<Mon. Not. R. Astron. Soc., 422, 89-105 (2012)>
=2012MNRAS.422...89M 2012MNRAS.422...89M
ADC_Keywords: Galaxies, nearby ; Stars, variable ; Photometry, UBV
Keywords: stars: variables: RR Lyrae - galaxies: individual: Cetus dSph -
Local Group - galaxies: stellar content
Abstract:
We investigate the variable star content of the isolated, Local Group,
dwarf spheroidal (dSph) galaxy Cetus. Multi-epoch, wide-field images
collected with the Very Large Telescope/Visible Multiobject
Spectrograph camera allowed us to detect 638 variable stars (630 RR
Lyrae stars and eight anomalous Cepheids), 475 of which are new
detections. We present a full catalogue of periods, amplitudes and
mean magnitudes.
Description:
The analysis of variable stars in the Cetus dSph galaxy presented in
this paper is based on data collected in service mode using the VIMOS
camera mounted on the VLT (ESO program 081.D-0775, P.I.: E.J.
Bernard). The images were acquired during six nights between 2008 July
27 and August 8.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 73 630 Pulsational properties of the RR Lyrae stars
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See also:
J/ApJ/699/1742 : LCID project. I. Cetus and Tucana variables (Bernard+, 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- ID Object identification, VNNN
6- 7 A2 --- Type RR Lyr class (ab, c or d) (1)
9- 10 I2 h RAh Hour of right Ascension (J2000)
12- 13 I2 min RAm Minute of right Ascension (J2000)
15- 19 F5.2 s RAs Second of right Ascension (J2000)
21 A1 --- DE- Sign of Declination (J2000)
22- 23 I2 deg DEd Degree of Declination (J2000)
25- 26 I2 arcmin DEm Arcminute of Declination (J2000)
28- 31 F4.1 arcsec DEs Arcsecond of Declination (J2000)
33- 37 F5.3 d Per Period
39- 44 F6.3 [d] logPer Logarithm of the Period
46- 51 F6.3 mag Bmag Intensity-averaged B magnitude
53- 57 F5.3 mag Bamp The B amplitude
59- 64 F6.3 mag Vmag Intensity-averaged V magnitude
66- 70 F5.3 mag Vamp The V amplitude
72- 73 A2 --- Com Notes and omments (2)
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Note (1): RR Lyr classes are:
ab = Fundamental mode RR Lyrae
c = First-overtone mode RR Lyrae
d = Double mode RR Lyrae
Note (2): Comments as follows:
f1 = possible Alias of the true period
f2 = star Blended with another star or galaxy
f3 = Noisy light curve
f4 = star in Vignetted area or on the edge of a chip
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Nov-2012