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J/A+A/324/915       Blue stragglers in M3     (Ferraro+ 1997)

HST observations of Blue Stragglers stars in the core of the globular cluster M3 Ferraro F.R., Paltrinieri B., Fusi Pecci F., Cacciari C., Dorman B., Rood R.T., Buonanno R., Corsi C.E., Burgarella D., Laget M. <Astron. Astrophys. 324, 915 (1997)> =1997A&A...324..915F (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Stars, blue ; Photometry, ultraviolet Mission_Name: HST Keywords: clusters: globular: M 3 - stars: population II - stars: blue stragglers Abstract: The core of the Galactic Globular Cluster M 3 (NGC 5272) has been observed with the WFPC2 through the filters F255W, F336W, F555W, and F814W. Using these observations along with a thorough reanalysis of earlier catalogs, we have produced a catalog of blue straggler stars (BSS) spanning the cluster. Earlier studies and the fainter part of our sample suffer severe selection biases. Our analysis is based on a more reliable bright global sample of 122 BSS. We confirm earlier suggestions that the radial BSS distribution in M 3 is bimodal. It is strongly peaked in the center, has a clear dip 100-200" from the center, and rises again at larger radii. The observed distribution agrees with the dynamical model of Sigurdsson et al. (1994ApJ...431L.115S) which takes into account both star collisions and merging of primordial binaries for the origin of BSS. The observed luminosity functions of BSS in the inner and outer parts of the cluster are different. Interpreting these using the models of Bailyn & Pinsonneault (1995ApJ...439..705B), we suggest that the BSS in the inner cluster are formed by stellar collisions and those in the outer cluster from merging primordial binaries. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 13 42.2 +28 23 M 3 = NGC 5272 ----------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 69 72 V,I,U,UV(F255W) photometry of 72 bright BSS in M 3 table3 69 99 V,I,U,UV(F255W) photometry of 99 faint BSS in M 3 table4 70 263 Global sample of 263 BSS in M3
Byte-by-byte Description of file: table2 table3
Bytes Format Units Label Explanations
1- 5 I5 --- Star Star designation (this paper) 9- 14 F6.3 mag Vmag V magnitude 18- 23 F6.3 mag Imag I magnitude 27- 32 F6.3 mag Umag U magnitude 36- 41 F6.3 mag UVmag UV (F255W) magnitude 43- 50 F8.3 arcsec Xpos X coordinate 52- 59 F8.3 arcsec Ypos Y coordinate 62- 68 F7.3 arcsec Dist Distance from the cluster center
Byte-by-byte Description of file: table4
Bytes Format Units Label Explanations
2- 4 I3 --- BSS BSS designation in the global sample 6- 13 A8 --- Name Original (this or previous papers) identification number (1) 14 A1 --- n_Name [+] +: BSS in the global bright sample 18- 23 F6.3 mag Vmag V magnitude 25- 32 F8.3 arcsec Xpos X coordinate 34- 41 F8.3 arcsec Ypos Y coordinate 44- 50 F7.3 arcsec Dist Distance from the cluster center 52- 55 I4 --- GYBS ? Identification number in GYBS, 1994AJ....108.1786G 56 A1 --- n_GYBS [no] Note on GYBS (2) 57- 60 I4 --- BHS ? Identification number in BHS, 1993ApJ...408L..89B 61 A1 --- n_BHS [no] Note on BHS (2) 62- 64 I3 --- BPQ ? Identification number in BPQ, 1995A&A...301..675B 65 A1 --- n_BPQ [no] Note on BPQ (2) 67- 69 I3 --- F93 ? Identification number in F93, 1993AJ....106.2324F 70 A1 --- n_F93 [no] Note on F93 (2)
Note (1): HST: Hubble Space Telescope F93: Ferraro et al., 1993AJ....106.2324F S53: Sandage, 1953AJ.....58...61S BHS: Bolte et al., 1993ApJ...408L..89B Note (2): n: BSS candidate is located in the field of view of that survey but was not identified as a BSS o: BSS is located out of the field of view
Acknowledgements: F.R. Ferraro References: Bolte et al., BHS =1993ApJ...408L..89B Burgarella et al., BPQ =1995A&A...301..675B Ferraro et al., F93 =1993AJ....106.2324F Guhathakurta et al., GYBS =1994AJ....108.1786G
(End) Patricia Bauer [CDS] 24-Feb-1997
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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