J/A+A/532/A78 Long-period variables in NGC 147 and NGC 185 (Lorenz+, 2011)
Long-period variables in NGC 147 and NGC 185.
Lorenz D., Lebzelter T., Nowotny W., Telting J., Kerschbaum F., Olofsson H.,
Schwarz H.E.
<Astron. Astrophys. 532, A78 (2011)>
=2011A&A...532A..78L 2011A&A...532A..78L
ADC_Keywords: Galaxies, nearby ; Stars, variable ; Photometry
Keywords: stars: AGB and post-AGB - stars: late-type -
stars: variables: general - Local Group -
galaxies: individual: NGC 147 - galaxies: individual: NGC 185
Abstract:
Previous studies on the stellar content of the two nearby dwarf
galaxies NGC 147 and NGC 185 reveal a rich population of late-type
giants in both systems, including a large number of carbon-rich
objects. These stars are known to show pronounced photometric
variability, which can be used for a more detailed characterisation of
these highly evolved stars. Owing to their well-studied parameters,
these Local Group members are ideal candidates for comparative
studies.
Through photometric monitoring, we attempt to provide a catalogue of
long-period variables (LPVs), including Mira variables, semi-regular
variables, and even irregular variables in NGC 147 and NGC 185. We
investigate the light variations and compare the characteristics of
these two LPV populations with the results found for other galaxies,
such as the LMC.
Description:
Tables list the period search results of the two dwarf galaxies
NGC 147 and NGC 185. The first five columns give the internal IDs, the
coordinates (J2000), mean i-band magnitudes (obtained from the time
series) as well as K-band magnitudes. Periods, sigma-amplitudes, and
the SIGSPEC-significance are found in the next three columns.
Long-period variables exhibiting two significant periods have entries
in the ninth and tenth columns listing the second period and its
SIGSPEC-significance. The last two columns give the types of different
chemistry and the IDs carried out by the authors of Nowotny et al.
(2003, Cat. J/A+A/403/93).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 213 Period search results of NGC 147
table2.dat 102 513 Period search results of NGC 185
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See also:
J/A+A/403/93 : Photometry of AGB stars in NGC 185 and NGC 147 (Nowotny+, 2003)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- NGC Parent galaxy NGC number (147 or 185) (1)
4 A1 --- --- [V]
5- 10 I06 --- Vno Internal identification number (1)
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 24 F5.2 s RAs Right ascension (J2000)
28 A1 --- DE- Declination sign
29- 30 I2 deg DEd Declination (J2000)
32- 33 I2 arcmin DEm Declination (J2000)
35- 39 F5.2 arcsec DEs Declination (J2000)
43- 47 F5.2 mag Imag Mean I-band magnitude
51- 55 F5.2 mag Ksmag ? Mean Ks-band magnitude
59- 61 I3 d Per1 ? First significant period
65- 68 F4.2 mag Amp Sigma-amplitude of the lightcurve
72- 74 F3.1 --- Signi1 ? Significance of the detected period
78- 81 I4 d Per2 ? Second significant period
85- 87 F3.1 --- Signi2 ? Significance of the detected period
91 A1 --- Type [CMSu] Chemistry type (2)
95-102 I8 --- ID ? Identification number of Nowotny et al.,
Cat. J/A+A/403/93 (3)
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Note (1): Full names are 147V000NNN for table1, 185V000NNN for table2.
Note (2): Chemistry type code as follows:
C = carbon-rich long-period variables
M = oxygen-rich long-period variables
S = long-period variables (C/O close to unity)
u = unclassified long-period variables
Note (3): Names are <[NKO2003] NGC 147 NNNNNNNN> in Simbad for table1,
and <[NKO2003] NGC 185 NNNNNNNN> for table2.
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Acknowledgements:
Denise Lorenz, denise.lorenz (at)univie.ac.at
(End) D. Lorenz [Department of Astronomy, Vienna], P. Vannier [CDS] 17-Jun-2011