J/A+A/434/235 Abundances of BHB stars in NGC 1904 (Fabbian+, 2005)
Abundance anomalies in hot horizontal branch stars of the
Galactic globular cluster NGC 1904.
Fabbian D., Recio-Blanco A., Gratton R.G., Piotto G.
<Astron. Astrophys. 434, 235 (2005)>
=2005A&A...434..235F 2005A&A...434..235F
ADC_Keywords: Clusters, globular ; Equivalent widths
Keywords: globular clusters: general - globular clusters: individual: M79 -
stars: horizontal-branch - stars: abundances
Description:
The abundance measurements are based on high-resolution optical
spectroscopical data, obtained during 2 observing runs with the
Ultraviolet and Visual Echelle Spectrograph mounted on Kueyen (Very
Large Telescope UT2). Ten target stars in the extended blue horizontal
branch of the Galactic globular cluster NGC 1904 (M79) have been
analysed.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 31 20 Positions of all the stars studied
ews.dat 48 473 Equivalent widths for the 10 BHB stars in NGC 1904
--------------------------------------------------------------------------------
See also:
J/A+AS/125/1 : The globular cluster NGC 1904 (Kravtsov+ 1997)
J/AJ/107/230 : BVRI CCD photometry of NGC 1904 (Alcaino+, 1994)
J/AJ/112/601 : UV photometry in M79 (Hill+ 1996)
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [m79]
4 A1 --- --- [-]
5- 7 I3 --- m79 [209/555] Star number
11- 12 I2 h RAh right ascension (J2000.0)
14- 15 I2 min RAm right ascension (J2000.0)
17- 20 F4.1 s RAs right ascension (J2000.0)
23 A1 --- DE- Declination sign (J2000.0)
24- 25 I2 deg DEd Declination (J2000.0)
27- 28 I2 arcmin DEm Declination (J2000.0)
30- 31 I2 arcsec DEs Declination (J2000.0)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: ews.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [m79]
4 A1 --- --- [-]
5- 7 I3 --- m79 [209/555] Star number
9- 13 A5 --- El Chemical element and ionization stage
15- 21 F7.2 0.1nm lambda Wavelength (Å)
23- 27 F5.2 eV EP Excitation potential
29- 33 F5.2 --- loggf Oscillator strength
35 A1 --- l_EW Limit flag on EW
36- 41 F6.1 0.1pm EW Equivalent width (mÅ)
43 A1 --- leEW Limit flag on e_EW
44- 48 F5.2 0.1pm e_EW Uncertainty in EW
--------------------------------------------------------------------------------
Acknowledgements: Damian Fabbian, damian(at)mso.anu.edu.au
History:
* 11-Jan-2005: Original version (the '-' sign in declination is missing)
* 19-Dec-2012: Fixed the sign of declination in the file "stars.dat"
(End) Damian Fabbian [RSAA, Australian National Univ.] 11-Jan-2005