J/AJ/136/1921 Variable stars of Draco dSph (Kinemuchi+, 2008)
The variable stars of the Draco dwarf spheroidal galaxy: revisited.
Kinemuchi K., Harris H.C., Smith H.A., Silbermann N.A., Snyder L.A.,
Lacluyze A.P., Clark C.L.
<Astron. J., 136, 1921-1939 (2008)>
=2008AJ....136.1921K 2008AJ....136.1921K
ADC_Keywords: Galaxies, nearby ; Stars, variable ; QSOs ; Photometry, CCD
Keywords: galaxies: dwarf - stars: variables: other
Abstract:
We present a CCD survey of variable stars in the Draco dwarf
spheroidal galaxy. This survey, which has the largest areal coverage
since the original variable star survey by Baade & Swope
(1961AJ.....66..300B 1961AJ.....66..300B), includes photometry for 270 RR Lyrae (RRL)
stars, 9 anomalous Cepheids (ACs), 2 eclipsing binaries, and 12 slow,
irregular red variables, as well as 30 background QSOs. Twenty-six
probable double-mode RRL stars were identified. Observed parameters,
including mean V and I magnitudes, V amplitudes, and periods, have
been derived.
Description:
Our survey of the Draco dSph galaxy was conducted at two telescopes:
the 1.0m at the US Naval Observatory (USNO) in Flagstaff, AZ, and the
2.3m telescope at the Wyoming Infrared Observatory (WIRO), at Mt.
Jelm, Wyoming. Combined, the two data sets cover a time interval of
four years (1993-1996).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 66 270 Properties of Draco RRLyr stars
table7.dat 70 164 Fourier decomposition parameters for RRab stars
table8.dat 59 9 Parameters for Draco anomalous Cepheids
table9.dat 93 14 Long-period, Semi-regular red variable stars,
carbon stars and eclipsing binaries
table10.dat 71 30 QSOs found in our Draco survey
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See also:
J/AJ/127/861 : RR Lyrae in Draco dSph (Bonanos+, 2004)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [KHS2008] [1/332] Running identification number
5- 6 I2 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of Declinqtion (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 35 F7.5 d Per Period
37- 40 F4.2 --- Amp Amplitude
42- 46 F5.2 mag <Vmag> Intensity-weighted Johnson V band magnitude
48- 52 F5.2 mag <Imag> Intensity-weighted Cousins I band magnitude
54- 59 A6 --- Type RRLyr type (ab, c, and Bl for Blazhko effect)
61- 66 A6 --- Rem Remarks (B04 = star in Bonanos et al. 2004,
Cat. J/AJ/127/861)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [KHS2008] [1/332] Running identification number
5- 11 F7.4 mag A0 Fundamental Fourier amplitude (in V band)
13- 18 F6.4 --- R21 Amplitude ratio R21
20- 25 F6.4 --- R31 Amplitude ratio R31
27- 32 F6.4 --- R41 Amplitude ratio R41
34- 39 F6.4 rad phi21 φ21 Fourier parameter
41- 46 F6.4 rad phi31 φ31 Fourier parameter
47- 52 F6.4 rad phi41 φ41 Fourier parameter
53- 58 F6.4 rad e_phi31 rms uncertainty on phi31
59- 63 F5.2 [Sun] [Fe/H] Metallicity
65- 68 F4.2 [Sun] e_[Fe/H] rms uncertainty on [Fe/H]
70 A1 --- DM [*] * for stars that have passed the
DM<5.0 criterion (Clement & Shelton,
1999ApJ...515L..85C 1999ApJ...515L..85C)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [KHS2008] [1/332] Running identification number
4 A1 --- n_[KHS2008] [*] (1)
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- Sign of Declinqtion (J2000)
19- 20 I2 deg DEd Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 36 F7.5 d Per Period
38- 41 F4.2 mag Vamp Amplitude (on the V data)
43- 47 F5.2 mag <Vmag> Intensity-weighted Johnson V band magnitude
49- 53 F5.2 mag <Imag> Intensity-weighted Cousins I band magnitude
55- 59 F5.2 mag VMAG Absolute V magnitude
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Note (1): Stars denoted with an asterisk are previously known Anomalous
Cepheids (Acs; (Norris & Zinn 1975ApJ...202..335N 1975ApJ...202..335N; Zinn & Searle
1976ApJ...209..734Z 1976ApJ...209..734Z; Nemec et al. 1988, ASP Conf. Ser. 4, 180).
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Byte-by-byte Description of file: table9.dat table10.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [KHS2008] [1/332] Running identification number
5- 6 I2 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign for declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 33 F5.2 mag Vmag Johnson V band magnitude
35- 39 F5.2 mag Imag Cousins I band magnitude
41- 44 F4.2 mag V-I Johnson-Cousins V-I colour index
46- 49 F4.2 mag e_Vmag rms uncertainty on Vmag
51- 54 F4.2 mag e_Imag rms uncertainty on Imag
56- 93 A38 --- Com Comments (1)
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Note (1): Membership in table9, with the values:
1 = Draco RV member (Armandroff et al. 1995, Cat. J/AJ/110/2131),
2 = Draco RV member (Olszewski et al. 1995AJ....110.2120O 1995AJ....110.2120O),
3 = Draco proper motion member (Stetson 1980AJ.....85..387S 1980AJ.....85..387S).
For table10, lists the origin of the spectra, if available;
(b) indicates a QSO at 8" from another QSO
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History:
* 24-Jun-2011: From electronic version of the journal
* 08-Aug-2011: tables 8 and 9 added
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 18-May-2011