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J/MNRAS/432/3349  Galactic star clusters structural parameters  (Camargo+, 2013)

Towards a census of the Galactic anticentre star clusters. III. Tracing the spiral structure in the outer disc. Camargo D., Bica E., Bonatto C. <Mon. Not. R. Astron. Soc., 432, 3349-3360 (2013)> =2013MNRAS.432.3349C (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Clusters, open ; Morphology Keywords: Galaxy: disc - open clusters and associations: general - Galaxy: structure Abstract: In this paper, we investigate the nature of 27 star cluster candidates, most of them projected towards the Galactic anticentre. We derive fundamental parameters for 20 confirmed clusters, among these 7 are new identifications. Four of the remaining are uncertain cases that require deeper photometry to establish their nature, and four are probably field fluctuations. In addition, we provide a partial census of the open clusters towards the Galactic anticentre. We also include in this study some interesting objects outside the anticentre region, in the second and third Galactic quadrants, mainly in the Perseus and outer arms. These clusters confirm the extension of the outer arm along the third quadrant. We also point out that the embedded cluster FSR 486, at a distance of 7.2±1.3kpc from the Sun, is projected on the line of sight of the Local Group irregular dwarf galaxy IC 10. Thus, part of the unusual properties of IC 10 may be explained by a Galactic contamination. We point out the importance of embedded clusters in tracing the spiral structure. Description: We investigate the nature of 27 star cluster candidates. Out of this total, 17 are located in the anticentre region in the sector 160°≤l≤200°, 5 in the second and 5 in the third Galactic quadrants, outside the anticentre sector. 20 objects were confirmed as star clusters and we derived their parameters. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 114 20 Derived fundamental parameters for confirmed star clusters in the present study table3.dat 84 6 Structural parameters for clusters in the current sample tableb1.dat 114 54 Derived fundamental parameters for clusters in Papers I, II, and III tableb2.dat 84 27 Structural parameters for clusters in Papers I, II, and III
Byte-by-byte Description of file: table2.dat tableb1.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Cluster Cluster name 13- 15 A3 --- Phase [EC OC ECt] Phase (1) 17- 18 I2 h RAh Optimized central right ascension (J2000) 20- 21 I2 min RAm Optimized central right ascension (J2000) 23- 26 F4.1 s RAs Optimized central right ascension (J2000) 28 A1 --- DE- Optimized central declination sign (J2000) 29- 30 I2 deg DEd Optimized central declination (J2000) 32- 33 I2 arcmin DEm Optimized central declination (J2000) 35- 38 F4.1 arcsec DEs Optimized central declination (J2000) 40- 43 F4.2 mag AV Absorption in V band 45- 49 F5.3 mag e_AV rms uncertainty on AV in the cluster's central region 51- 54 I4 Myr Age Age from 2MASS photometry 56- 59 I4 Myr e_Age rms uncertainty on Age 61- 64 F4.2 kpc Dist Heliocentric distance 66- 69 F4.2 kpc e_Dist rms uncertainty on Dist 71- 75 F5.2 kpc RGC Galactocentric distance (2) 77- 80 F4.2 kpc e_RGC rms uncertainty on RGC 82- 87 F6.2 kpc xCG Galactocentric x position 89- 92 F4.2 kpc e_xCG rms uncertainty on xCG 94- 98 F5.2 kpc yCG Galactocentric y position 100-103 F4.2 kpc e_yCG rms uncertainty on yCG 105-109 F5.2 kpc zCG Galactocentric z position 111-114 F4.2 kpc e_zCG rms uncertainty on zCG
Note (1): Evolurionary phase as follows: EC = embedded cluster OC = open cluster ECt = transition cluster Note (2): RGC calculated using R_☉-=7.2kpc as the distance of the Sun to the Galactic centre (Bica et al., 2006, Cat. J/A+A/450/105)
Byte-by-byte Description of file: table3.dat tableb2.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Cluster Cluster name 14- 17 F4.2 arcmin/pix Scale arcmin to parsec scale 19- 24 F6.2 pc-2 sOK σOK in pc (1) 26- 29 F4.1 pc-2 e_sOK rms uncertainty on sOK 31- 34 F4.2 pc Rcore Core radius in pc 36- 39 F4.2 pc e_Rcore rms uncertainty on Rcore 41- 44 F4.1 pc RRDP Radial density profile radius in pc 46- 48 F3.1 pc e_RRDP rms uncertainty on RRDP 50- 54 F5.2 arcmin-2 sOK2 σOK in arcmin (1) 56- 59 F4.1 arcmin-2 e_sOK2 rms uncertainty on sOK2 61- 64 F4.2 arcmin Rcore2 Core radius in arcmin 66- 69 F4.2 arcmin e_Rcore2 rmd uncertainty onRcore2 71- 74 F4.1 arcmin RRDP2 Radial density profile radius in arcmin 76- 78 F3.1 arcmin e_RRDP2 rms uncertainty on RRDP2 80- 84 A5 --- DR ? Comparison field ring (only in table 3)
Note (1): σ(R)=σbgO/(1+(R/Rcore)2), where σbg is the residual background surface density of stars, σO is the central density of stars and Rcore is the core radius. To minimise degrees of freedom in RDP fits with the King-like profile (see text), σbg was kept fixed (measured in the respective comparison fields) while σ0 and Rcore were allowed to vary.
History: From electronic version of the journal References: Camargo et al., Paper I 2010A&A...521A..42C Camargo et al., Paper II 2011MNRAS.416.1522C Camargo et al., Paper III 2012MNRAS.423.1940C
(End) Patricia Vannier [CDS] 26-May-2017
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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