J/A+A/338/581 Field 3 Palomar-Groningen survey. II. (Schultheis+ 1998)
Field #3 of the Palomar-Groningen survey.
II. Near-infrared photometry of semiregular variables.
Schultheis M., Ng Y.K., Hron J., Kerschbaum F.
<Astron. Astrophys. 338, 581 (1998)>
=1998A&A...338..581S 1998A&A...338..581S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, infrared
Keywords: stars: evolution - stars: AGB and post-AGB - Galaxy: center
Abstract:
Near-infrared photometry (JHKL'M) was obtained for 78 semiregular
variables (SRVs) in field #3 of the Palomar-Groningen survey (PG3,
l=0°, b=-10°). Together with a sample of Miras in this field a
comparison is made with a sample of field SRVs and Miras. The PG3 SRVs
form a sequence (period-luminosity & period-colour) with the PG3
Miras, in which the SRVs are the short period extension to the Miras.
The field and PG3 Miras follow the same P/(J-K)0 relation, while
this is not the case for the field and PG3 SRVs. Both the PG3 SRVs and
Miras follow the Sgr I period-luminosity relation adopted from Glass
et al. (1995MNRAS.273..383G 1995MNRAS.273..383G). They are likely pulsating in the
fundamental mode and have metallicities spanning the range from
intermediate to approximately solar.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 47 103 Near-infrared photometry for the stars in field #3
of the Palomar-Groningen Variable Star Survey
(Plaut, 1971A&AS....4...75P 1971A&AS....4...75P).
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See also:
J/A+AS/123/115 : Field 3 of the Palomar-Groningen Survey. I. (Ng+ 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Name Stellar identifier, from Wesselink (1987)
7- 10 A4 --- VarType Variable type from Plaut (1971A&AS....4...75P 1971A&AS....4...75P)
12- 16 F5.2 mag Jmag J magnitude (1)
18- 22 F5.2 mag Hmag H magnitude (1)
24- 28 F5.2 mag Kmag K magnitude (1)
30- 32 F3.1 mag L'mag ? L' magnitude (1)
34- 36 F3.1 mag Mmag ? M magnitude (1)
38 I1 --- Run Observing run identifier (2)
40- 45 F6.2 d Per ? Period determined by Wesselink (1987)
if available
47 I1 --- q_Per [0/3]? Quality flag related with the period
and the identification of the star (3)
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Note (1): Typical errors are ∼0.02mag in JHK, ∼0.1mag in L' and >0.2mag in M.
Note (2): 1: 28 Jul - 2 Aug 1990, Observer: Ng
2: 21 May - 3 Jun 1991, Observer: Brown
3: 20 - 29 Aug 1991 Observer: Ng
4: 16 - 21 Jun 1992, Observers: Ng & Schultheis
5: 29 Jun - 3 Jul 1993, Observers: Ng & Schultheis
Note (3): 0: no doubt about the determined period and classification
1: classification is correct but alternative period is possible
2: period determination is correct but the classification is doubtful
3: both period determination and classification are unreliable
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Acknowledgements: Mathias Schultheis
References:
Wesselink Th.J.H., 1987, Ph.D. thesis, Catholic University Nijmegen,
the Netherlands
(End) Patricia Bauer [CDS] 11-Sep-1998