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J/AJ/136/118     Open clusters as galactic disk tracers. I.  (Frinchaboy+, 2008)

Open clusters as galactic disk tracers. I. Project motivation, cluster membership, and bulk three-dimensional kinematics. Frinchaboy P.M., Majewski S.R. <Astron. J., 136, 118-145 (2008)> =2008AJ....136..118F
ADC_Keywords: Clusters, open ; Radial velocities ; Proper motions ; Photometry Keywords: Galaxy: fundamental parameters - Galaxy: kinematics and dynamics - Galaxy: structure - open clusters and associations: general Abstract: We have begun a survey of the chemical and dynamical properties of the Milky Way disk as traced by open star clusters. In this first contribution, the general goals of our survey are outlined and the strengths and limitations of using star clusters as a Galactic disk tracer sample are discussed. We also present medium-resolution (R∼150000) spectroscopy of open cluster stars obtained with the Hydra multi-object spectrographs on the Cerro Tololo Inter-American Observatory 4m and WIYN 3.5m telescopes. Here we use these data to determine the radial velocities of 3436 stars in the fields of open clusters within about 3kpc, with specific attention to stars having proper motions in the Tycho-2 catalog. Additional radial velocity members (without Tycho-2 proper motions) that can be used for future studies of these clusters were also identified. Description: We have collected homogeneous spectroscopic observations for 71 open clusters using the HYDRA multi-fiber spectrographs on the Blanco 4m telescope at Cerro Tololo Inter-American Observatory (CTIO) and the 3.5m WIYN telescope at Kitt Peak National Observatory (KPNO). This project was conducted using publicly competed NOAO time and was granted long-term status,6 which permitted observations in the semesters 2002A-2004A over a total of 14 awarded CTIO 4m and six WIYN 3.5m nights. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 68 71 Dias et al. (2002, Cat. B/ocl) target cluster properties table4.dat 61 25 Comparison of RV standard star values for stars in table2 table2.dat 86 199 *RV standard observations table10.dat 121 3568 Cluster analysis table11.dat 101 3536 2MASS (II/246) and Tycho-2 (I/259) photometry for targeted cluster stars
Note on table2.dat: HD12605 in original table, corrected into HD126053, as in table4 of the paper.
See also: B/ocl : Optically visible open clusters and Candidates (Dias+ 2002-10) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) I/259 : The Tycho-2 Catalogue (Hog+ 2000) J/A+A/376/441 : Absolute proper motions of 112 open clusters (Dias+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 15- 16 I2 h RAh Hour of Right Ascension (J2000) 18- 19 I2 min RAm Minute of Right Ascension (J2000) 21- 22 I2 s RAs Second of Right Ascension (J2000) 24 A1 --- DE- Sign of the Declination (J2000) 25- 26 I2 deg DEd Degree of Declination (J2000) 28- 29 I2 arcmin DEm Arcminute of Declination (J2000) 31- 32 I2 arcsec DEs Arcsecond of Declination (J2000) 34- 41 F8.4 deg GLON Galactic longitude 43- 50 F8.4 deg GLAT Galactic latitude 52- 55 I4 pc Dist Distance 57- 61 F5.3 [yr] logAge Age 63- 64 I2 arcmin Diam Diameter 66- 68 A3 --- Run Run number(s) (1)
Note (1): Run dates: 1 = 2002 March (CTIO) 2 = 2003 March (CTIO) 3 = 2003 June (CTIO) 4 = 2003 August (CTIO) 5 = 2003 September (WIYN)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Star Star name 10- 20 A11 --- SpType Spectral type 21- 30 A10 "YYYY/MM/DD" Obs.Date Date of the observation 32- 36 F5.1 km/s RV Radial velocity 38- 40 F3.1 km/s e_RV Error in RV 43- 47 F5.1 km/s RVIAU ? IAU radial velocity 49- 51 F3.1 km/s e_RVIAU ? Uncertainty in RVIAU 52 A1 --- f_RVIAU [a] Indicates not IAU RV standard star (1) 54- 57 F4.1 km/s DRV Radial velocity difference 59- 61 F3.1 km/s e_DRV Error in DRV
Note (1): Stars HR 675 and HR 7773 are not IAU standards. Due to the lack of IAU standards hotter than F-type stars, we used stars from Fekel (1999, Precise Stellar Radial Velocities (ASP Conf. Ser. 185)).
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 "YYYY/MM/DD" Obs.Date Date of the observation 12- 19 A8 --- Star Star name 21- 31 A11 --- SpType Spectral type 33- 37 I5 --- Frame Frame number 39- 42 I4 --- Fiber Fiber number 44- 49 F6.2 --- TDR Tonry-Davis ratio 51- 56 F6.2 km/s RV Radial velocity 58- 61 F4.2 km/s e_RV Error in RV 63- 68 F6.2 km/s <RV> ? Mean radial velocity from that frame 70- 73 F4.2 km/s e_<RV> ? Error in <RV> 75- 80 F6.2 km/s RVIAU ? IAU radial velocity 82- 84 F3.1 km/s e_RVIAU ? Uncertainty in RVIAU 86 A1 --- f_RVIAU [a] Indicates not an IAU RV standard star
Byte-by-byte Description of file: table10.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 15 A1 --- n_Name [M] star selected as cluster member using the 3D criteria 17- 30 A14 --- Name Star name (G1) 32- 33 I2 h RAh Hour of Right Ascension (J2000) 35- 36 I2 min RAm Minute of Right Ascension (J2000) 38- 43 F6.3 s RAs Second of Right Ascension (J2000) 45 A1 --- DE- Sign of the Declination (J2000) 46- 47 I2 deg DEd Degree of Declination (J2000) 49- 50 I2 arcmin DEm Arcminute of Declination (J2000) 52- 57 F6.3 arcsec DEs Arcsecond of Declination (J2000) 59- 64 F6.1 mas/yr pmRA ? Proper motion along RA*cos(DE) 66- 68 F3.1 mas/yr e_pmRA ? Uncertainty in pmRA 70- 75 F6.1 mas/yr pmDE ? Proper motion along DE 77- 79 F3.1 mas/yr e_pmDE ? Uncertainty in pmDE 81- 87 F7.2 km/s RV Radial velocity 89- 93 F5.2 km/s e_RV Uncertainty in RV 95- 98 A4 --- n_RV Spectral template type ("Red" or "Blue") (2) 100-101 I2 % PDias ? Dias et al. membership probability (3) 103-107 F5.1 % PKc Proper motion membership probability 109-113 F5.1 % PVc Radial Velocity membership probability 115-119 F5.1 % Ptotc Joint membership probability 121 A1 --- Flag [d] Star not analyzed due to large errors (see section 5.1)
Note (2): Used in the cross-correlation for velocity determination, as described in Section 3.3. Note (3): Blank rows indicate star wasn't used in Dias et al. (2001, Cat. J/A+A/376/441 and B/ocl) membership analysis.
Byte-by-byte Description of file: table11.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Cluster Cluster name 15- 28 A14 --- Name Star name (G1) 30- 45 A16 --- 2MASS 2MASS identification (blank if no 2MASS match) 47- 48 I2 h RAh Hour of Right Ascension (J2000) 50- 51 I2 min RAm Minute of Right Ascension (J2000) 53- 57 F5.2 s RAs Second of Right Ascension (J2000) 59 A1 --- DE- Sign of the Declination (J2000) 60- 61 I2 deg DEd Degree of Declination (J2000) 63- 64 I2 arcmin DEm Arcminute of Declination (J2000) 66- 69 F4.1 arcsec DEs Arcsecond of Declination (J2000) 71- 75 F5.2 mag Bmag ? Tycho B band magnitude 77- 81 F5.2 mag Vmag ? Tycho V band magnitude 83- 87 F5.2 mag Jmag ? 2MASS J band magnitude 89- 93 F5.2 mag Hmag ? 2MASS H band magnitude 95- 99 F5.2 mag Ksmag ? 2MASS Ks band magnitude 101 A1 --- Mm [Y/N] A 3D member?
Global Notes: Note (G1): the format of the name is: * the Tycho-2 name (Cat. I/259) if existing; otherwise * of the form "XXXXf####" for candidates from GSC (Cat. I/220) * of the form "XXXXu####" for candidates from USNO-B1.0 (Cat. I/284)
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 16-Jan-2011
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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