J/AJ/158/105 IR photometry of field RR Lyrae variable stars (Layden+, 2019)
Infrared K-band photometry of field RR Lyrae variable stars.
Layden A.C., Tiede G.P., Chaboyer B., Bunner C., Smitka M.T.
<Astron. J., 158, 105 (2019)>
=2019AJ....158..105L 2019AJ....158..105L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, bright ; Photometry, infrared ;
Abundances, [Fe/H] ; Reddening ; Parallaxes, trigonometric
Keywords: methods: statistical - stars: distances -
stars: fundamental parameters - stars: variables: RR Lyrae
Abstract:
We present multi-epoch infrared photometry in the Ks-band for 74 bright
RR Lyrae variable stars tied directly to the Two-Micron All-Sky Survey
(2MASS) photometric system. We systematize additional K-band photometry
from the literature to the 2MASS system and combine it to obtain photometry
for 146 RR Lyrae stars on a consistent, modern system. A set of outlier
stars in the literature photometry is identified and discussed. Reddening
estimates for each star are gathered from the literature and combined
to provide an estimate of the interstellar absorption affecting each star,
and we find excellent agreement with another source in the literature.
We utilize trigonometric parallaxes from the Second Data Release of the
European Space Agency's Gaia astrometric satellite to determine the
absolute magnitude, MKs for each of these stars, and analyze them using
the astrometry-based luminosity prescription to obtain a parallax-based
calibration of MK (RR). Our period-luminosity-metallicity relationship is
MKs=(-2.8±0.2)(logP+0.27)+(0.12±0.02) ([Fe/H]+1.3)-(0.41±0.03) mag.
A Gaia global zero-point error of πzp=-0.042±0.013 mas is determined
for this sample of RR Lyrae stars.
Description:
We developed a target list for our Ks-band photometry program based on
the 144 RRLs in Fernley et al. (1998, J/A+A/330/515) and supplemented it
with stars from the RRL lists of Layden (1994, J/AJ/108/1016) and other
sources, resulting in a working database of 172 RRLs. Since our target
stars shown in Table 1 are spread across the entire sky, we obtained images
of these RRLs using two different sets of equipment. In the Southern
Hemisphere, we used the 1.3 m telescope of the Small and Medium Aperture
Research Telescope System (SMARTS) consortium located on Cerro Tololo in
Chile in queue-scheduled mode during 229 nights between 2004 January 27
and 2005 January 30. In the Northern Hemisphere, we obtained images using
the McGraw-Hill 1.3 m telescope at the Michigan-Dartmouth-MIT (MDM)
Observatory on Kitt Peak in Arizona using the TIFKAM infrared imager during
observing runs on 2006 June 9-25 and on 2007 June 23 through July 5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 147 The RR Lyrae sample and literature data
table3.dat 52 1060 Time-series photometry of the variable stars
table4.dat 91 77 Final photometry of the variable stars
table5.dat 90 146 Combined photometry and interstellar absorption
table7.dat 93 146 Final data for absolute magnitude solutions
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/108/1016 : Kinematics of local RR lyrae stars. I. (Layden, 1994)
J/A+A/330/515 : RR Lyrae parallaxes & proper motions (Fernley+ 1998)
J/MNRAS/386/2115 : Type II Cepheid and RR Lyrae variables (Feast+, 2008)
J/MNRAS/396/553 : Galactic RR Lyrae data (Dambis, 2009)
J/MNRAS/435/3206 : Properties of field RR Lyrae variables (Dambis+, 2013)
J/ApJ/780/92 : Light curves of the RR Lyr SDSS J015450.17+001500.7
(Szabo+, 2014)
J/MNRAS/459/4360 : Field RR Lyrae stars (Liska+, 2016)
J/A+A/605/A79 : TGAS Cepheids and RR Lyrae stars (Gaia Collaboration+, 2017)
J/AJ/153/96 : Standard Galactic field RR Lyrae. I. Photometry
(Monson+, 2017)
J/AJ/154/263 : NIR photometry of 77 RR Lyrae stars (Karczmarek+, 2017)
J/ApJ/857/54 : JHKs photometry of VVV RR Lyrae stars (Dekany+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Star Variable star identifier
10- 25 A16 --- 2MASS 2MASS catalog identifier (HHMMSSss+DDMMSSs)
27- 32 F6.2 deg GLON [4.38/358.25] Galactic longitude
34- 39 F6.2 deg GLAT [-78.86/87.44] Galactic latitude
41- 48 F8.6 d PerF98 [0.25551/0.746568]?=9.99 Period from
Fernley et al. (1998, J/A+A/330/515)
50- 59 F10.8 d PerVSX [0.2555104/0.746566] Period from International
Variable Star Index (VSX) (1)
61- 65 F5.2 [Sun] [Fe/H]L94 [-2.49/0.07]?=99.99 Metallicity from Layden
(1994, J/AJ/108/1016)
67- 71 F5.2 [Sun] [Fe/H]F98 [-2.56/-0.07]?=99.99 Metallicity from
Fernley et al. (1998, J/A+A/330/515)
73 I1 --- Nsrc [0/7] Number of sources in Fernley et al.
(1998, J/A+A/330/515)
75- 79 F5.3 mag E-SF11 [0.004/1.124] Reddening from
Schlafly & Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S)
81- 85 F5.2 mag E-B92 [-0.03/0.44]?=99.99 Reddening from B-V color,
from Blanco (1992AJ....104..734B 1992AJ....104..734B)
87- 91 F5.2 mag E-F98 [-0.02/0.41]?=99.99 Reddening from V-K color,
from Fernley et al. (1998, J/A+A/330/515)
93- 97 F5.2 mag Kmag [6.53/11.07]?=99.99 Apparent K-band magnitude
from Fernley et al. (1998, J/A+A/330/515)
99 I1 --- Ref [1/9] Photometry source reference (2)
101-113 A13 --- Com Comment on individual star (3)
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Note (1): Accessed circa 2018 January from http://www.aavso.org/vsx/index.php.
Note (2): Reference as follows:
1 = Skillen et al. (1989MNRAS.241..281S 1989MNRAS.241..281S);
2 = Fernley, Skillen & Burki (1993A&A...268..591F 1993A&A...268..591F);
3 = Unpublished (see Fernley et al. 1998, J/A+A/330/515);
9 = Null.
Note (3): A reference to the source of the original photometry for stars with
Baade-Wesselink analyses are given as follows:
bw10 = Liu & Janes (1989ApJS...69..593L 1989ApJS...69..593L);
bw21 = Jones et al. (1987ApJ...312..254J 1987ApJ...312..254J);
bw22 = Jones et al. (1987ApJ...314..605J 1987ApJ...314..605J);
bw23 = Jones et al. (1998ApJ...326..312J 1998ApJ...326..312J);
bw24 = Jones et al. (1988ApJ...332..206J 1988ApJ...332..206J);
bw25 = Jones et al. (1992ApJ...386..646J 1992ApJ...386..646J);
bw31 = Fernley et al. (1989MNRAS.236..447F 1989MNRAS.236..447F);
bw32 = Skillen et al. (1989MNRAS.241..281S 1989MNRAS.241..281S);
bw33 = Fernley et al. (1990MNRAS.247..287F 1990MNRAS.247..287F);
bw34 = Fernley et al. (1990MNRAS.242..685F 1990MNRAS.242..685F);
bw35 = Cacciari, Clemintini & Fernley (1992ApJ...396..219C 1992ApJ...396..219C);
bw36 = Skillen et al. (1993MNRAS.265..301S 1993MNRAS.265..301S).
Other comments are defined as follows:
Szabo2014 = For the star NSV 660 (LP Cet), multi-epoch photometry in the 2MASS
Ks band is available from Szabo et al. (2014, J/ApJ/780/92),
along with values for period and [Fe/H];
RRc = First-ovetone, c-type pulsator;
B = Exhibits the Blazhko effect in optical light;
B? = The Blazhko effect is suspected;
BP = Blazhko effect.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Star Variable star identifier
10- 21 F12.4 d HJD Heliocentric Julian Date
23- 27 F5.3 --- Phase [0/1] Phase
29- 34 F6.3 mag Ksmag [8.101/11.881] Apparent Ks band magnitude
36- 40 F5.3 mag e_Ksmag [0/0.08] Uncertainty in Ksmag
42- 43 I2 --- Ncomp [1/12] Number of observation components
45- 48 F4.2 --- Air [1/2.37] Airmass
50 I1 --- Obs [1/2] Observatory code (G1)
52 I1 --- Q [1/2] Quality code (1=Low; 2=High) (1)
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Note (1): An integer code describing the quality of the variable star's image
profile and hence photometric reliability.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Star Variable star identifier
10 I1 --- Obs [1/3] Observatory code (G1)
12- 13 I2 --- Ncomp [0/12] Number of comparison stars used
15- 18 I4 --- Nobs [2/2969] Number of observations
20- 29 F10.8 d Per [0.273458/0.7342106] Adopted period
31 I1 --- r_Per [1/3] Reference code for Per (1)
33- 42 F10.5 d Epoch [659.80021/4284.66199] Epoch
44- 49 F6.3 mag Ksmagmean [8.243/13.987] Mean Ks band magnitude
51- 55 F5.2 mag B_Ksmag [8.12/13.9] Maximum Ks band magnitude
57- 61 F5.2 mag b_Ksmag [8.49/14.2] Minimum Ks band magnitude
63 I1 --- Npar [1/3] Number of parameters in template fit
65- 67 A3 --- Temp Name of best-fitting template (2)
69- 73 F5.3 mag sigmaf [0.002/0.125] Scatter (weighted standard
deviation) of observed points around best fit
75- 79 F5.3 mag sigmaz [0.005/0.06]?=9.999 Uncertainty due to
external calibration
81- 85 F5.3 mag sigmac [0/0.041]?=9.999 Uncertainty due to color
difference
87- 91 F5.3 mag e_Ksmagmean [0.007/0.072] Overall systematic uncertainty
in Ksmagmean
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Note (1): Reference code as follows:
1 = VSX;
2 = Fernley et al. (1998, J/A+A/330/515);
3 = Determined in this work.
Note (2): "ab1"-"ab5" and "c" are from (Jones et al. 1996PASP..108..877J 1996PASP..108..877J),
"EW" indicates a W UMa-type contact binary star.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Star Variable star identifier
10- 15 F6.3 mag KBWmag [6.496/10.883]?=99.999 Baade-Wessilink K' band
magnitude
17- 22 F6.3 mag Ksmagmean [8.243/13.987]?=99.999 Mean Ks band
magnitude
24- 28 F5.3 mag e_Ksmagmean [0.007/0.072]?=9.999 Uncertainty in Ksmagmean
30- 35 F6.3 mag KF98mag [6.511/11.051]?=99.999 K' band magnitude from
Fernley et al. (1998, J/A+A/330/515)
37- 41 F5.3 mag e_KF98mag [0.044/0.048]?=9.999 Uncertainty in KF98mag
43- 48 F6.3 mag KD13mag [6.519/11.745]?=99.999 K band magnitude from
Dambis et al. (2013, J/MNRAS/435/3206)
50- 54 F5.3 mag e_KD13mag [0.033/0.042]?=9.999 Uncertainty in KD13mag
56- 59 I4 --- CodeK [21/2101] K band photometry source code (1)
61- 66 F6.3 mag Kmagmean [6.498/13.987] Weighted mean K band magnitude
68- 72 F5.3 mag e_Kmagmean [0.007/0.032] Uncertainty in Kmagmean
74 I1 --- Flag [0/1] Scatter flag (2)
76- 80 F5.3 mag AK [0.003/0.153] Extinction in the K band
82- 86 F5.3 mag e_AK [0.003/0.016] Uncertainty in AK
88- 90 I3 --- CodeA [100/911] Interstellar absorption code (3)
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Note (1): We computed a weighted mean for each star using the following weights,
wi, and tracked which sources were utilized using a code composed of four
integers, ci. See Section 7.3 for a complete description of the code.
Note (2): A flag indicating whether the individual photometric measures scatter
more widely than indicated by the weighted mean where 1 or 0 means yes or no,
respectively.
Note (3): The code identifying the sources of the reddening values from Table 1
used to compute the weighted mean interstellar absorption AK, is defined
in Section 7.4.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Star Variable star identifier
10- 11 A2 --- Type [ab c] RR Lyrae type
13- 18 F6.3 mag Kmag [6.47/13.976] Apparent K band magnitude,
extinction corrected
20- 24 F5.3 mag e_Kmag [0.009/0.033] Uncertainty in Kmag
26- 30 F5.2 [Sun] [Fe/H] [-2.56/-0.07] Metallicity
32- 35 F4.2 [Sun] e_[Fe/H] [0.08/0.22] Uncertainty in [Fe/H]
37- 45 F9.6 [d] logPf [-0.465592/-0.126931] Log period;
fundamentalized
47- 65 I19 --- Gaia Gaia DR2 identifier
67- 73 F7.4 mas plx [-2.6108/2.6837] Gaia DR2 parallax
75- 80 F6.4 mas e_plx [0.0187/0.6128] Uncertainty in plx
82- 87 F6.3 mag KsMag [-2.228/0.716] Absolute Ks band magnitude
89- 93 F5.3 mag e_KsMag [0.04/3.318] Uncertainty in KsMag
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Global notes:
Note (G1): Observatory code as follows:
1 = Small and Medium Aperture Research Telescope System (SMARTS);
2 = Michigan-Dartmouth-MIT (MDM);
3 = 2MASS (Cat. II/246).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 16-Oct-2019