J/ApJ/884/20 OGLE-III Mira variables in the Magellanic Clouds (Bhardwaj+, 2019)
Multiwavelength period-luminosity and period-luminosity-color relations at
maximum light for Mira variables in the Magellanic Clouds.
Bhardwaj A., Kanbur S., He S., Rejkuba M., Matsunaga N., de Grijs R.,
Sharma K., Singh H.P., Baug T., Ngeow C.-C., Ou J.-Y.
<Astrophys. J., 884, 20 (2019)>
=2019ApJ...884...20B 2019ApJ...884...20B
ADC_Keywords: Stars, variable; Photometry, VRI; Magellanic Clouds
Keywords: Mira variable stars ; Pulsating variable stars ;
Long period variable stars ; Magellanic Clouds
Abstract:
We present Period-Luminosity and Period-Luminosity-Color relations at
maximum light for Mira variables in the Magellanic Clouds using
time-series data from the Optical Gravitational Lensing Experiment
(OGLE-III) and Gaia data release 2. The maximum-light relations
exhibit a scatter typically up to ∼30% smaller than their mean-light
counterparts. The apparent magnitudes of oxygen-rich Miras at maximum
light display significantly smaller cycle-to-cycle variations than at
minimum light. High-precision photometric data for Kepler Mira
candidates also exhibit stable magnitude variations at the brightest
epochs, while their multi-epoch spectra display strong Balmer emission
lines and weak molecular absorption at maximum light. The stability of
maximum-light magnitudes for Miras possibly occurs due to the decrease
in the sensitivity to molecular bands at their warmest phase. At
near-infrared wavelengths, the period-luminosity relations (PLRs) of
Miras display similar dispersion at mean and maximum light with
limited time-series data in the Magellanic Clouds. A kink in the
oxygen-rich Mira PLRs is found at 300 days in the VI-bands, which
shifts to longer periods (∼350 days) at near-infrared wavelengths.
Oxygen-rich Mira PLRs at maximum light provide a relative distance
modulus, Δµ=0.48±0.08mag, between the Magellanic Clouds
with a smaller statistical uncertainty than the mean-light relations.
The maximum-light properties of Miras can be very useful for stellar
atmosphere modeling and distance scale studies provided their
stability and the universality can be established in other stellar
environments in the era of extremely large telescopes.
Description:
Time-series data for Mira variables from Optical Gravitational Lensing
Experiment (OGLE-III; Soszynski+ 2009, J/AcA/59/239 and
2011, J/AcA/61/217) are adopted as the primary catalog. Out of
1663/352 Miras in the LMC/SMC, there are 1438/302 (457/36 O-rich,
981/266 C-rich) stars with both V and I-band light curves. On average,
more than 600 I-band and 60 V-band observations are available for each
Mira variable, which span more than a decade. Multiband photometry is
obtained by cross-matching OGLE data with the Gaia DR2 (I/345) within
a 2" search radius. The light curves of 650/111 Miras in the LMC/SMC
are obtained with only ∼80 median number of observations per Mira
combined in the three Gaia filters. A limited amount of NIR data
available for 690 Miras in the LMC (Yuan+ 2017, J/AJ/154/149), and
90 Miras in the SMC (Ita+ 2018, J/MNRAS/481/4206) are also used in
this analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 1723 Mira properties in the Magellanic Clouds using
OGLE-III data
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See also:
II/322 : OGLE-III. Magellanic Clouds stellar proper motions (Poleski+, 2012)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)
J/MNRAS/353/705 : OGLE Variables in Magellanic Clouds (Ita+, 2004)
J/AJ/136/1242 : LMC long-period variables from MACHO (Fraser+, 2008)
J/MNRAS/386/313 : IR observations of Mira variables (Whitelock+, 2008)
J/MNRAS/397/933 : LMC type II Cepheids JHKs magnitudes (Matsunaga+, 2009)
J/AcA/59/239 : VI LCs of LMC long-period variables (Soszynski+, 2009)
J/MNRAS/405/1711 : VRIg'i' photometry of 7 M15 giants (McDonald+, 2010)
J/ApJ/723/1195 : SAGE AGB candidates (Riebel+, 2010)
J/AJ/142/103 : Cool evolved stars in SAGE-SMC and SAGE-LMC (Boyer+, 2011)
J/MNRAS/418/114 : Opacity-sampling models of Mira variables (Ireland+, 2011)
J/AcA/61/199 : OGLE3 Magellanic Clouds High PM stars (Poleski+, 2011)
J/AcA/61/217 : VI LCs of SMC long-period variables (Soszynski+, 2011)
J/AcA/62/247 : LMC phot. maps from OGLE-III shallow survey (Ulaczyk+, 2012)
J/AcA/63/21 : VI light curves of Galactic LPVs (Soszynski+, 2013)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/AJ/149/117 : LMC infrared survey. I. Phot. of Cepheids (Macri+, 2015)
J/MNRAS/452/910 : IC 1613 asymptotic giant branch variables (Menzies+, 2015)
J/AJ/151/88 : LMC NIR Synoptic Survey. II. (Bhardwaj+, 2016)
J/AJ/152/164 : I-band light curves of OGLE LMC Miras (He+, 2016)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/ApJ/826/44 : Spitzer/IRS obs. of Magellanic carbon stars (Sloan+, 2016)
J/A+A/605/A100 : VVV survey Galactic Bulge Pop. II Cepheids (Bhardwaj+, 2017)
J/ApJS/232/16 : Mira stars discovered in LAMOST DR4 (Yao+, 2017)
J/AJ/154/149 : LMC NIR synoptic survey. V. NIR phot. of Miras (Yuan+, 2017)
J/ApJ/857/67 : HST obs. of Mira candidates in NGC 4258 (Huang+, 2018)
J/MNRAS/473/3131 : VMC survey. XXVI. SMC RR Lyrae stars (Muraveva+, 2018)
J/MNRAS/481/4206 : IRSF survey of variable stars in the SMC (Ita+, 2018)
J/AJ/156/112 : NIR Mira period-luminosity relations in M33 (Yuan+, 2018)
J/ApJ/877/49 : DUSTiNGS. V. 3.6 and 4.5um light curves (Goldman+, 2019)
J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- OGLE OGLE catalog identifier (
or in Simbad)
11- 16 F6.2 d Per [103/928] OGLE catalog period
18 A1 --- Class OGLE classification (1)
20- 25 F6.3 mag VmagMax [12.38/22.63] Maximum-light V band magnitude
27- 31 F5.3 mag e_VmagMax [0.05/0.7] Uncertainty in VmagMax
33- 38 F6.3 mag ImagMax [7.25/19.91] Maximum-light I band magnitude
40- 44 F5.3 mag e_ImagMax [0.05/0.2] Uncertainty in ImagMax
46- 51 F6.3 mag VmagAvg [13.93/22.67] Mean-light V band magnitude
53- 57 F5.3 mag e_VmagAvg [0.05/0.6] Uncertainty in VmagAvg
59- 64 F6.3 mag ImagAvg [8.4/20.8] Mean-light I band magnitude
66- 70 F5.3 mag e_ImagAvg [0.05/0.5] Uncertainty in ImagAvg
72- 77 F6.3 mag VmagMin [14.7/23.7] Minimum-light V band magnitude
79- 83 F5.3 mag e_VmagMin [0.05/3] Uncertainty in VmagMin
85- 90 F6.3 mag ImagMin [9.1/21.6] Minimum-light I band magnitude
92- 96 F5.3 mag e_ImagMin [0.05/0.7] Uncertainty in ImagMin
98-102 F5.3 mag DelImag [0.8/3.7] Amplitude in the I band
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Note (1): OGLE classification as follows:
O = Oxygen rich (487 occurrences).
C = Carbon rich (1236 occurrences).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-Mar-2021