J/AJ/156/112 Near-infrared Mira period-luminosity relations in M33 (Yuan+, 2018)
Near-infrared Mira period-luminosity relations in M33.
Yuan W., Macri L.M., Javadi A., Lin Z., Huang J.Z.
<Astron. J., 156, 112 (2018)>
=2018AJ....156..112Y 2018AJ....156..112Y (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Stars, variable ; Ephemerides ;
Photometry, infrared
Keywords: distance scale - methods: statistical - stars: AGB and post-AGB -
stars: variables: general
Abstract:
We analyze sparsely sampled near-infrared (JHKs) light curves of a
sample of 1781 Mira variable candidates in M33, originally discovered
using I-band time-series observations. We extend our single-band
semi-parametric Gaussian process modeling of Mira light curves to a
multiband version and obtain improved period determinations. We use our
previous results on near-infrared properties of candidate Miras in the
LMC to classify the majority of the M33 sample into oxygen- or carbon-rich
subsets. We derive period-luminosity relations for O-rich Miras and
determine a distance modulus for M33 of 24.80±0.06 mag.
Description:
We used the photometrically and astrometrically calibrated data products
of the UKIRT observations described in Javadi et al. (2015MNRAS.447.3973J 2015MNRAS.447.3973J).
These include multi-epoch measurements of the entire disk of M33 in JHKs
from 2005 September to 2007 October. We used the FLAMINGOS NIR Imager
(Elston 1998SPIE.3354..404E 1998SPIE.3354..404E) on the KPNO 4 m telescope to observe 13 fields
covering most of the disk of M33. We used the Gemini North NIR Imager
(NIRI; Hodapp et al. 2003PASP..115.1388H 2003PASP..115.1388H) in f/6 mode to obtain JHKs
observations of 46 small fields (2'x2') across the disk of M33. Images
were obtained on 12 different nights from 2002 September to 2006 January,
with a few fields observed multiple times. We retrieved the I-band
photometric measurements and the Mira candidate catalog from Yuan et al.
(2017, J/AJ/153/170). The I-band observations were collected by the DIRECT
survey (Macri et al. J/AJ/121/861) and follow-up observations
(Pellerin & Macri J/ApJS/193/26) with a combined baseline of nearly a
decade. Combining the I-band light curves with the NIR data, we
redetermined the periods for the Mira candidates discovered by Yuan et al.
(2017, J/AJ/153/170).
Objects:
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RA (ICRS) DE Designation(s)
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01 33 50.90 +30 39 35.8 M33 = M 33
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 44 249 Observing log
table3.dat 91 1781 Properties of Mira candidates
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See also:
J/AJ/121/861 : BVI photometry of central part of M33 (Macri+, 2001)
J/MNRAS/371/1405 : Variables in M33 (Hartman+, 2006)
J/ApJ/664/850 : Spitzer observations of stars in M33 (McQuinn+, 2007)
J/A+A/487/131 : JHKs photometry of LPVs in M33 (Cioni+, 2008)
J/MNRAS/386/313 : IR observations of Mira variables (Whitelock+, 2008)
J/ApJS/193/26 : The M33 synoptic stellar survey. I. (Pellerin+, 2011)
J/MNRAS/411/263 : JHK variable stars in M33 (Javadi+ 2011)
J/AJ/153/170 : The M33 Synoptic Stellar Survey. II. Mira variables
(Yuan+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 d Time [2536.959/4401.942] Julian Date of observation
(JD-2450000)
10- 15 A6 --- Site Observing site (Gemini or KPNO)
17- 19 A3 --- Field Internal field designation
21- 21 A1 --- Filter [JHK] Filter
23- 30 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000) (1)
32- 39 F8.5 deg DEdeg Declination in decimal degrees (J2000) (1)
41- 44 F4.1 s Exp [10/30.1] Exposure time
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Note (1): Of field center.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- ID Identifier with M33SSSJ prefix
(M33SSS JHHMMSS.ss+DDMMSS.s in Simbad)
18- 25 F8.5 deg RAdeg Right Ascension in decimal degrees (J2000)
27- 34 F8.5 deg DEdeg Declination in decimal degrees (J2000)
36- 41 F6.1 d Per [101.4/1754] Best-fit period
43- 47 F5.1 d e_Per [0.3/142] Uncertainty in Per
49- 53 F5.2 mag Jmagmean [14.89/21.5]? Mean J-band magnitude
55- 58 F4.2 mag e_Jmagmean [0.01/2]? Uncertainty in Jmagmean
60- 64 F5.2 mag Hmagmean [14.06/20.7]? Mean H-band magnitude
66- 69 F4.2 mag e_Hmagmean [0.01/2]? Uncertainty in Hmagmean
71- 75 F5.2 mag Ksmagmean [13.53/20.1]? Mean Ks-band magnitude
77- 80 F4.2 mag e_Ksmagmean [0.01/2]? Uncertainty in Ksmagmean
82- 82 A1 --- Class [OCN] Mira subclass (1)
84- 91 A8 --- photID Internal photometric identifier
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Note (1): Mira subclass as follows:
O = Oxygen-rich;
C = Carbon-rich;
N = Not classified.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 27-Feb-2019