J/A+A/360/509 Chemical abundances in 7 red giants (Hamdani+, 2000)
Chemical abundances in seven red giants of NGC 2360 and NGC 2447
Hamdani S., North P., Mowlavi N., Raboud D., Mermilliod J.-C.
<Astron. Astrophys. 360, 509 (2000)>
=2000A&A...360..509H 2000A&A...360..509H
ADC_Keywords: Stars, late-type ; Stars, giant ; Abundances ; Equivalent widths
Keywords: stars: abundances - stars: fundamental parameters -
stars: evolution - stars: late-type -
Galaxy: open clusters and associations: individual: NGC 2360, NGC 2447
Abstract:
Chemical abundances of about fifteen elements from oxygen to europium
are measured in seven red giants of the two open clusters NGC 2360 and
NGC 2447. The effective temperatures of the giants are determined
spectroscopically by taking advantage of their known masses
(∼2M☉ in NGC 2360 and ∼3M☉ in NGC 2447) and bolometric
magnitudes. The average iron abundances we obtain for the two clusters
are [Fe/H]=0.07 for NGC 2360 and [Fe/H]=0.03 for NGC 2447.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
07 18 19.0 -15 34 59 NGC 2360 7 = Cl* NGC 2360 EGG 8
07 17 43.0 -15 37 34 NGC 2360 50 = Cl* NGC 2360 EGG 67
07 17 24.0 -15 33 28 NGC 2360 62 = Cl* NGC 2360 EGG 81
07 17 35.1 -15 38 35 NGC 2360 86 = Cl* NGC 2360 EGG 110
07 44 50.2 -23 52 27 NGC 2447 28 = CD-23 6102
07 44 33.6 -23 51 43 NGC 2447 34
07 44 25.7 -23 49 54 NGC 2447 41
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 75 150 Equivalent widths for the seven red giants
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Species Species designation
6 A1 --- n_Species [*] Note on Species (1)
7- 13 F7.2 0.1nm Lambda Wavelength
15- 18 F4.2 eV EP Excitation Potential
21- 25 F5.2 --- log(gf) Oscillator strength (logarithmic scale)
27- 32 F6.2 0.1pm EWN2360-7 ? Equivalent width for star NGC 2360-7
34- 39 F6.2 0.1pm EWN2360-50 ? Equivalent width for star NGC 2360-50
41- 46 F6.2 0.1pm EWN2360-62 ? Equivalent width for star NGC 2360-62
48- 53 F6.2 0.1pm EWN2360-86 ? Equivalent width for star NGC 2360-86
55- 60 F6.2 0.1pm EWN2447-28 ? Equivalent width for star NGC 2447-28
62- 67 F6.2 0.1pm EWN2447-34 ? Equivalent width for star NGC 2447-34
69- 74 F6.2 0.1pm EWN2447-41 ? Equivalent width for star NGC 2447-41
--------------------------------------------------------------------------------
Note (1): For Eu II, the final abundance, presented in table 4, is deduced
from a synthetic spectra and not from the equivalent width given
in table 3.
--------------------------------------------------------------------------------
Acknowledgements: Pierre North
(End) Patricia Bauer [CDS] 25-Jul-2000