J/A+A/669/A60 List of Mira LSP candidates in LMC (Pawlak, 2023)
Do Miras show the long secondary periods?
Pawlak M.
<Astron. Astrophys. 669, A60 (2023)>
=2023A&A...669A..60P 2023A&A...669A..60P (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Stars, giant ; Stars, variable ; Optical
Keywords: stars: AGB and post-AGB - stars: variables: general -
stars: pulsators: general - Magellanic Clouds
Abstract:
The long secondary period (LSP) phenomenon, which is commonly observed
in pulsating red giants, has not been detected in any Mira yet. The
goal of this paper is to verify, if there is a physical reason for
this or if it is simply an observational bias. The OGLE-III Sample of
Long Period Variables in the Large Magellanic Cloud, containing 1663
Miras, is used to perform a search for secondary periodicity in these
objects and identify candidates for the long secondary period stars
based on the location on the period-luminosity diagram. Out of 1663
Miras, 108 were identified as potential candidates, with variability
broadly consistent with LSP. This makes 7% of the whole Mira sample in
the Large Magellanic Cloud. Most, if not all of the Mira LSP
candidates are C-rich stars. The results of this analysis suggest that
Miras may exhibit long secondary periods. However, the long-term
variability can also be related to period and amplitude irregularities
that Miras are known to exhibit. Further study will be necessary to
draw a definitive conclusion.
Description:
The list of the Mira LSP candidates in the Large Magellanic Cloud
identified in the OGLE-III catalog of long period variables (Soszynski
et al., 2009AcA....59..239S 2009AcA....59..239S, Cat. J/AcA/59/239), including the
puttative LSP periods.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 55 108 The list of the Mira LSP candidates (table 1)
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See also:
J/AcA/59/239 : VI light curves of LMC long-period variables (Soszynski+, 2009)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- ID The OGLE id from Soszynski et al.
(2009AcA....59..239S 2009AcA....59..239S, Cat. J/AcA/59/239),
OGLE-LMC-LPV-NNNNN
20- 21 I2 h RAh Right ascension (J2000.0)
23- 24 I2 min RAm Right ascension (J2000.0)
26- 30 F5.2 s RAs Right ascension (J2000.0)
32 A1 --- DE- Declination sign (J2000.0)
33- 34 I2 deg DEd Declination (J2000.0)
36- 37 I2 arcmin DEm Declination (J2000.0)
39- 42 F4.1 arcsec DEs Declination (J2000.0)
44- 48 F5.1 d Ppul Pulsational period from Soszynski et al.
(2009AcA....59..239S 2009AcA....59..239S, Cat. J/AcA/59/239)
50- 55 F6.1 d Plsp Puttative long secondary period
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Acknowledgements:
Michal Pawlak,
(End) Patricia Vannier [CDS] 24-Oct-2022