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J/A+A/495/249    EROS-2 beat Cepheids in Magellanic Clouds    (Marquette+, 2009)

The beat Cepheids in the Magellanic Clouds: an analysis from the EROS-2 database. Marquette J.B., Beaulieu J.P., Buchler J.R., Szabo R., Tisserand P., Belghith S., Fouque P., Lesquoy E., Milsztajn, A., Schwarzenberg-Czerny A, Afonso C., Albert J.N., Andersen J., Ansari R., Aubourg E., Bareyre P., Charlot X., Coutures C., Ferlet R., Glicenstein J.F., Goldman B., Gould A., Graff D., Gros M., Haissinski J., Hamadache C., de Kat J., Le Guillou L., Loup C., Magneville C., Maurice E., Maury A., Moniez M., Palanque-Delabrouille N., Perdereau O., Rahal Y.R., Rich J., Spiro M., Vidal-Madjar A. <Astron. Astrophys. 495, 249 (2009)> =2009A&A...495..249M
ADC_Keywords: Magellanic Clouds ; Stars, variable Keywords: Magellanic Clouds - Cepheids Abstract: We present the results of a systematic search of Beat Cepheids (BC) in the Magellanic Clouds from the EROS-2 database. Observations were carried out on the MARLY telescope (ESO La Silla, Chile) between July 1996 and March 2003. A specific pipeline was developed to extract periodic light curves from the photometric data obtained with the PEIDA package (Ansari, 1996VA.....40..519A). Two different populations are identified in each Cloud: the BCs pulsating on the fundamental and first overtone modes (FO/F objects) simultaneously, and those pulsating on the first and second overtones (SO/FO objects). A Fourier analysis was performed on each light curve. We derived lower, higher and mean values of metallicities for the FO/F objects, using linear nonadiabatic convective stellar models. Description: The catalogs of beat Cepheids in the Magellanic Clouds from the EROS-2 database (EROS2-BC) contains positional data, periods of the two modes of pulsation, values of metallicity (for the FO/F pulsators only) and the Fourier coefficients in the BE EROS passband (420-720nm). These coefficients are defined in the paper (see Table 1). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 190 74 Fundamental/1st overtone (FO/F) pulsators in LMC table2.dat 164 173 First and second overtone (SO/FO) pulsators in LMC table3.dat 190 41 Fundamental/1st overtone (FO/F) pulsators in SMC table4.dat 164 129 First and second overtone (SO/FO) pulsators in SMC
See also: II/279 : EROS-II in the Magellanic Clouds (Marquette+ 2007) J/A+A/303/137 : EROS Variables: Cepheids in the bar of LMC (Beaulieu+ 1995) J/ApJS/117/135 : Photometry of Cepheids in Magellanic Clouds (Moffett+ 1998) J/AcA/49/223 : BVI photometry of OGLE LMC Cepheids (Udalski+, 1999) J/AcA/49/437 : BVI photometry of OGLE SMC Cepheids (Udalski+, 1999) J/AcA/49/543 : OGLE LMC + SMC Cepheids VI photometry (Pietrzynski+, 1999) J/ApJS/142/71 : BVRI observations of LMC Cepheids (Sebo+, 2002) J/A+A/385/793 : Cepheids in Magellanic Clouds. II. (Antonello+, 2002) J/A+A/411/361 : VI photometry of extra-galactic Cepheids (Kanbur+, 2003) J/A+A/415/521 : BVRIJK and velocities for MC Cepheids (Storm+, 2004) J/AJ/128/2239 : JHKs photometry of 92 LMC Cepheids (Persson+, 2004) J/A+A/440/487 : Cepheids in the young LMC cluster NGC 1866 (Storm+, 2005) J/A+A/462/599 : JHKs photometry of LMC cluster Cepheids (Testa+, 2007) J/A+A/486/891 : Light curve of EROS2 J005135-714459 (Marquette+, 2008) J/A+A/333/L35 : MC Cepheids Fourier decomposition (Antonello 1998) Byte-by-byte Description of file: table[13].dat
Bytes Format Units Label Explanations
3- 16 A14 --- EROS2-BC Designation, JHHMMSS-DDMMSS (G1) 17 A1 --- --- [(] 18- 29 A12 --- Int Internal number (G2) 30 A1 --- --- [)] 32- 33 I2 h RAh Right Ascension (J2000) 34 A1 --- --- [:] 35- 36 I2 min RAm Right ascension (J2000) 37 A1 --- --- [:] 38- 42 F5.2 s RAs Right ascension (J2000) 44 A1 --- DE- Declination sign 45- 46 I2 deg DEd Declination (J2000) 47 A1 --- --- [:] 48- 49 I2 arcmin DEm Declination (J2000) 50 A1 --- --- [:] 51- 54 F4.1 arcsec DEs Declination (J2000) 56- 62 F7.5 d P0 Period of the first mode of pulsation 64- 70 F7.5 d P1 Period of the second mode of pulsation 72- 78 F7.5 --- P1/P0 Period ratio P1/P0 80- 87 F8.5 --- Zmax Higher limit of metallicity 89- 96 F8.5 --- Zmin Lower limit of metallicity 98-105 F8.5 --- Zmean Mean metallicity 107-112 F6.3 mag R0 R_0_ Fourier coefficient in B_E_ band (G3) 114-118 F5.3 mag R11 R^1^_1_ Fourier coefficient in B_E_ band (G3) 120-125 F6.3 rad Phi11 φ11 Fourier coefficient in BE 127-131 F5.3 mag R121 R^1^_21_ Fourier coefficient in B_E_ band (G3) 133-137 F5.3 rad Phi121 φ121 Fourier coefficient in BE 140-144 F5.3 mag R131 R^1^_31_ Fourier coefficient in B_E_ band (G3) 146-150 F5.3 rad Phi131 φ131 Fourier coefficient in BE band 153-157 F5.3 mag R21 R^2^_1_ Fourier coefficient in B_E_ band (G3) 160-164 F5.3 mag R221 R^2^_21_ Fourier coefficient in B_E_ band (G3) 168-172 F5.3 rad Phi221 φ231 Fourier coefficient in BE 178-182 F5.3 mag R231 R^2^_31_ Fourier coefficient in B_E_ band (G3) 186-190 F5.3 rad Phi231 φ231 Fourier coefficient in BE
Byte-by-byte Description of file: table2.dat table4.dat
Bytes Format Units Label Explanations
3- 16 A14 --- EROS2-BC Designation, JHHMMSS-DDMMSS (G1) 17 A1 --- --- [(] 18- 29 A12 --- Int Internal number (G2) 30 A1 --- --- [)] 32- 33 I2 h RAh Right Ascension (J2000) 34 A1 --- --- [:] 35- 36 I2 min RAm Right ascension (J2000) 37 A1 --- --- [:] 38- 42 F5.2 s RAs Right ascension (J2000) 44 A1 --- DE- Declination sign 45- 46 I2 deg DEd Declination (J2000) 47 A1 --- --- [:] 48- 49 I2 arcmin DEm Declination (J2000) 50 A1 --- --- [:] 51- 54 F4.1 arcsec DEs Declination (J2000) 56- 62 F7.5 d P0 Period of the first pulsation mode 64- 70 F7.5 d P1 Period of the second pulsation mode 72- 78 F7.5 --- P1/P0 Period ratio P1/P0 80- 85 F6.3 mag R0 R_0_ Fourier coefficient in B_E_ band (G3) 87- 91 F5.3 mag R11 R^1^_1_ Fourier coefficient in B_E_ band (G3) 93- 98 F6.3 rad Phi11 φ11 Fourier coefficient in BE 100-104 F5.3 mag R121 R^1^_21_ Fourier coefficient in B_E_ band (G3) 106-110 F5.3 rad Phi121 φ121 Fourier coefficient in BE 113-117 F5.3 mag R131 R^1^_31_ Fourier coefficient in B_E_ band (G3) 120-124 F5.3 rad Phi131 φ231 Fourier coefficient in BE 127-131 F5.3 mag R21 R^2^_1_ Fourier coefficient in B_E_ band (G3) 134-138 F5.3 mag R221 R^2^_21_ Fourier coefficient in B_E_ band (G3) 142-146 F5.3 rad Phi221 φ221 Fourier coefficient in BE 152-156 F5.3 mag R231 R^2^_31_ Fourier coefficient in B_E_ band (G3) 160-164 F5.3 rad Phi231 φ231 Fourier coefficient in BE
Global notes: Note (G1): The identifier of each star is given according to the recommendations of the IAU Commission 5 in The Rules and Regulations for Nomenclature (see the Annual Index of A&A). The general acronym used in the catalogue is EROS2-BC followed by J2000 equatorial coordinates in the format JHHMMSS-DDMMSS. Note (G2): The identifier Int is the star identifier used in the EROS-2 database. As an example, the star J053929-703819 with J2000 equatorial coordinates of 05:39:29.15, -70:38:19.2 is also referred to by the internal EROS-2 number lm0591l5619 (the 5619th star in the field lm059, CCD 1, quarter l) Note (G3): BE is broad-band 'blue' channel 420-720nm. The Fourier decomposition is, for 1 pulsation mode: R(t) = R0 + Σn Rn.cos(2πn/P + φn) The first number (e.g. '1' in R121) represents the pulsation mode number, the following the (e.g. '21' in R121) indicates the ratio of overtone (2) over fundamental (1).
Acknowledgements: Jean-Baptiste Marquette, marquett(at)iap.fr
(End) Jean-Baptiste Marquette [IAP-Paris], Patricia Vannier [CDS] 01-Dec-2008
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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