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J/ApJ/677/1069        Blue stragglers in NGC 6388           (Dalessandro+, 2008)

Blue straggler stars in the unusual globular cluster NGC 6388. Dalessandro E., Lanzoni B., Ferraro F.R., Rood R.T., Milone A., Piotto G., Valenti E. <Astrophys. J., 677, 1069-1079 (2008)> =2008ApJ...677.1069D
ADC_Keywords: Clusters, globular ; Photometry, UBV ; Stars, blue Keywords: binaries: general - blue stragglers - stars: horizontal-branch - globular clusters: individual (NGC 6388) - stars: evolution Abstract: We have used multiband high-resolution HST WFPC2 and ACS observations combined with wide-field ground-based observations to study the blue straggler star (BSS) population in the Galactic globular cluster NGC 6388. As in several other clusters we have studied, the BSS distribution is found to be bimodal: highly peaked in the cluster center, rapidly decreasing at intermediate radii, and rising again at larger radii. In other clusters the sparsely populated intermediate-radius region (or "zone of avoidance") corresponds well to that part of the cluster where dynamical friction would have caused the more massive BSSs or their binary progenitors to settle to the cluster center. Instead, in NGC 6388, BSSs still populate a region that should have been cleaned out by dynamical friction effects, thus suggesting that dynamical friction is somehow less efficient than expected. As a by-product of these observations, the peculiar morphology of the horizontal branch (HB) is also confirmed. In particular, within the (very extended) blue portion of the HB we are able to clearly characterize three subpopulations: ordinary blue HB stars, extreme HB stars, and blue hook stars. Each of these populations has a radial distribution which is indistinguishable from normal cluster stars. Description: We have used a combination of high-resolution and wide-field photometric data sets. The high-resolution set consists of a series of public multiband (from UV to optical) Wide Field Planetary Camera 2 (WFPC2) and Advanced Camera for Surveys (ACS) HST images, which have been retrieved from the ESO/ST-ECF Science Archive. The wide-field set is a complementary set of public B and V images obtained with the Wide Field Imager (WFI) mounted at the 2.2m ESO-MPI telescope at La Silla Observatory and retrieved from the ESO Science Archive. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 55 153 The blue straggler star population of NGC 6388
See also: J/A+A/314/448 : UBV photometry of a blue straggler in NGC 2354 (Lapasset+, 1996) J/A+A/324/915 : Blue stragglers in M3 (Ferraro+ 1997) J/ApJ/648/1026 : HST photometry of M5 blue stragglers (Warren+, 2006) J/ApJ/663/267 : Blue straggler population of globular cluster M5 (Lanzoni+, 2007) J/A+A/483/183 : Catalogue of Blue Stragglers (Moretti+, 2008) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [BSS-] 5- 7 I3 --- BSS [1/153] Blue straggler star number (<Cl* NGC 6388 BSS NNN> in Simbad) 9- 19 F11.7 deg RAdeg Right Ascension in decimal degrees (J2000) 21- 31 F11.7 deg DEdeg Declination in decimal degrees (J2000) 33- 37 F5.2 mag F255W ? WFPC2 F255W filter magnitude 39- 43 F5.2 mag Umag ? U band magnitude 45- 49 F5.2 mag Bmag ? B band magnitude 51- 55 F5.2 mag Vmag ? V band magnitude
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Sep-2010
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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