II/25 Photometry of orange-red CaI triplet in Late-Type Stars (Peat 1964)
Photometry of Orange-Red Ca I Triplet in Late-Type Stars. Table I
Peat D.W.
<Mon. Not. R. Astron. Soc., 128, 475 (1964)>
=1964MNRAS.128..475P 1964MNRAS.128..475P
ADC_Keywords: Stars, late-type ; Photometry, calcium triplet ;
Photometry, H-alpha
Description:
Calcium absorption lines were measured using narrow-band photometry on
296 high and low velocity G8-K5 stars of all luminosity classes.
Because the blue-violet region of the stellar spectra is too crowded
for narrow-band photometry, this investigation of abundance involved
measurements of the orange-red CaI triplet 4(3)P-5(3)S, with
wavelengths 6102.7, 6122.2 and 6162.2Å. "Calcium triplet ratio" is
defined as "the measured light intensity ratios, comparison/central
regions, calibrated in terms of a standard lamp as described in
previous Cambridge papers". The catalog (table I of paper) includes HD
number, (B-V) color index, Mg b ratio, Hα ratio, Calcium triplet
ratio, and a running number.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 39 296 Photometry of the orange-red CaI triplet
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See also:
II/24 : Hα Photometry of Northern late-type stars I. (Peat 1964)
II/22 : Hα Photometry of Southern late-type stars II (Peat 1965)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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4- 9 I6 --- HD HD designation of the star
11- 15 F5.2 mag (B-V) ? (B-V) color index
18- 21 F4.2 --- Mgb [2/3]? Mgb index (Deeming, 1960MNRAS.121...52D 1960MNRAS.121...52D)
24- 28 F5.3 --- Ha [0.9/1.2]? Hα ratio (see Peat: II/22, II/24)
31- 35 F5.3 --- CaT [0.07/1.21] Calcium triplet index (1)
37- 39 I3 --- Seq [1/296] Sequence number of the star
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Note (1): the triplet is located at 610.27, 612.22 and 616.22nm.
The bands chosen are:
central bands: 610.00-610.60, 611.83-612.41, 615.95-616.73nm
comparison bands: 606.70-607.70, 619.25-619.70, 620.19-620.75nm
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History:
* Tape received at CDS
* 03-May-1996: short description added by Julie Anne Watko [SSDOO/ADC]
* 29-Jul-2016: decimal points added, standardized (Francois Ochsenbein, CDS)
(End) Julie Anne Watko [SSDOO/ADC], Francois Ochsenbein [CDS] 03-May-1996