2009A&A...502..505B


Query : 2009A&A...502..505B

2009A&A...502..505B - Astronomy and Astrophysics, volume 502, 505-514 (2009/8-1)

Properties of RR Lyrae stars in the inner regions of the Large Magellanic Cloud. III. Near-infrared study.

BORISSOVA J., REJKUBA M., MINNITI D., CATELAN M. and IVANOV V.D.

Abstract (from CDS):

RR Lyrae variable stars are the primary Population II distance indicator. Likewise, the Large Magellanic Cloud (LMC) constitutes a key step in the extragalactic distance scale. By combining near-IR photometry and spectroscopically measured metallicities for a homogeneous sample of 50 RR Lyr stars in the LMC, we investigate the metallicity dependence of the period-luminosity relation in the near-infrared (IR), use the newly derived relations to re-derive the distance to the LMC, and compare the distance moduli obtained from RR Lyr and red clump stars. This paper presents new (single-epoch) J-band and (multi-epoch) Ks-band photometry of RR Lyr stars in 7 different LMC fields, observed with the near-IR camera SOFI at ESO's New Technology Telescope. Additional Ks-band data for another two LMC fields were taken with the ISPI infrared array at CTIO's Blanco 4m telescope. The near-IR photometry was cross-correlated with the MACHO and OGLE databases, resulting in a catalog of 62 RR Lyr stars with BVRIJKs photometry. A subsample of 50 stars also has spectroscopically measured metallicities. In the deep JK color-magnitude diagrams of 7 fields, red giant branch, red clump and RR Lyr stars are detected. The majority of RR Lyr stars are located within the instability strip with near-IR colors between 0.14≤(J-Ks)0<0.32. The period-luminosity relation only has a very mild dependence on metallicity in the K band, consistent with no dependence: MKs=2.11(±0.17)logP+0.05(±0.07)[Fe/H]-1.05. In the J band the currently available data do not allow firm conclusions regarding the metallicity dependence of the period-luminosity relation. The distance modulus of the LMC, derived using our near-IR period-luminosity-metallicity relation for RR Lyr stars, is (m-M)0=18.53±0.13, in very good agreement with the distance modulus from the red clump stars, 18.46±0.07. However, LMC modulus derived from the RR Lyrae stars depends on the parallax of the star RR Lyrae.

Abstract Copyright:

Journal keyword(s): Galaxies: Magellanic Clouds - stars: variables: RR Lyr - galaxies: distances and redshifts - stars: oscillations

VizieR on-line data: <Available at CDS (J/A+A/502/505): stars.dat table5.dat>

Simbad objects: 65

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Number of rows : 65
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6277 1
2 NAME Ret GlC 04 36 10.15 -58 51 34.8   14.00 14.25 13.50   ~ 152 1
3 OGLE LMC-RRLYR-3976 RR* 05 03 49.1574627960 -69 33 09.048981734     18.99   18.645 ~ 7 0
4 OGLE LMC-RRLYR-3986 RR* 05 03 51.3754588632 -69 33 31.388939172     19.49   19.052 ~ 6 0
5 OGLE LMC-RRLYR-4086 RR* 05 04 11.1953348208 -69 33 35.682063156     19.37   18.785 ~ 7 0
6 OGLE LMC-RRLYR-4150 RR* 05 04 22.8184449768 -69 33 32.604101064     19.24   18.986 ~ 6 0
7 OGLE LMC-SC9 392818 RR* 05 14 28.4288818752 -68 47 47.237069652   19.49 19.30   18.75 ~ 8 0
8 OGLE LMC-SC9 393085 RR* 05 14 55.6992592296 -68 46 21.640073304   19.50 19.26   18.76 ~ 7 0
9 OGLE LMC-SC9 392599 RR* 05 14 58.82 -68 48 57.8   19.89 19.39   18.69 ~ 7 0
10 OGLE LMC-SC9 392743 RR* 05 15 02.6087610120 -68 48 13.147858188   19.98 19.64   19.04 ~ 8 0
11 OGLE LMC-RRLYR-9886 RR* 05 16 53.4050082528 -70 48 59.412580596     19.65   18.978 ~ 5 0
12 OGLE LMC-RRLYR-9917 RR* 05 16 57.1628845656 -70 45 54.457875180     18.84   18.842 ~ 5 0
13 OGLE LMC-RRLYR-9945 RR* 05 16 59.9881056936 -70 47 12.818945400     19.42   18.765 ~ 6 0
14 OGLE LMC-RRLYR-9949 RR* 05 17 00.4992127512 -70 46 56.956440648     19.1   18.449 ~ 6 0
15 OGLE LMC-RRLYR-10077 RR* 05 17 15.1206342624 -70 45 46.566327096     19.24   18.700 ~ 5 0
16 OGLE LMC-RRLYR-10088 RR* 05 17 15.9981285312 -70 45 20.100915828     19.34   18.824 ~ 6 0
17 OGLE LMC-RRLYR-10195 RR* 05 17 26.4313742136 -70 46 11.343345168     19.39   18.741 ~ 6 0
18 OGLE LMC-SC7 56511 RR* 05 17 31.10 -69 27 17.6   19.64 18.93   18.16 ~ 7 0
19 OGLE LMC-SC7 57725 RR* 05 17 38.39 -69 26 28.8   19.50 19.15   18.64 ~ 6 0
20 OGLE LMC-SC7 57510 RR* 05 17 51.30 -69 27 07.5   19.35 18.89   18.49 ~ 7 0
21 OGLE LMC-SC7 52325 RR* 05 17 51.89 -69 27 41.4   19.67 19.50   18.91 ~ 6 0
22 OGLE LMC-SC7 49631 RR* 05 17 52.54 -69 28 56.3   19.46 19.00   18.40 ~ 6 0
23 OGLE LMC-SC7 56522 RR* 05 17 55.47 -69 27 16.2   18.81 18.33   17.73 ~ 7 0
24 OGLE LMC-SC7 51106 RR* 05 17 56.43 -69 29 34.7   19.53 19.29   18.89 ~ 5 0
25 OGLE LMC-CEP-1516 cC* 05 17 56.4978435528 -69 28 03.262363824   19.36 19.000   18.116 ~ 8 0
26 OGLE LMC-SC7 167800 RR* 05 18 13.64 -69 28 40.6   19.83 19.16   18.30 ~ 5 0
27 OGLE LMC-SC7 167469 RR* 05 18 15.04 -69 29 24.0   19.61 19.28   18.84 ~ 6 0
28 OGLE LMC-SC7 176277 RR* 05 18 25.23 -69 26 51.2   19.71 19.29   18.74 ~ 6 0
29 OGLE LMC-SC7 441568 RR* 05 19 57.2796777120 -69 15 39.809126268   19.50 19.18   18.74 ~ 7 0
30 OGLE LMC-SC6 111978 RR* 05 20 02.48 -69 14 31.0   19.15 18.96   18.48 ~ 6 0
31 OGLE LMC-SC6 111308 RR* 05 20 03.17 -69 13 16.2   19.31 18.89   18.67 ~ 7 0
32 OGLE LMC-SC6 112348 RR* 05 20 05.87 -69 13 13.3   19.73 19.06   18.49 ~ 5 0
33 OGLE LMC-SC6 104291 RR* 05 20 07.94 -69 17 17.3   19.62 19.23   18.70 ~ 4 0
34 OGLE LMC-SC6 112012 RR* 05 20 11.6995970256 -69 14 24.007610580   19.61 19.4   19.03 ~ 6 0
35 OGLE LMC-SC6 112043 RR* 05 20 13.51 -69 14 17.5   19.82 19.34   18.74 ~ 4 0
36 OGLE LMC-SC6 112904 RR* 05 20 18.87 -69 15 27.0   19.91 19.51   18.92 ~ 6 0
37 OGLE LMC-SC6 104629 RR* 05 20 21.13 -69 16 06.0   19.65 19.25   18.71 ~ 5 0
38 OGLE LMC-SC6 104623 RR* 05 20 27.00 -69 16 07.0   19.66 19.18   18.64 ~ 7 0
39 OGLE LMC-SC6 112200 RR* 05 20 30.5382986328 -69 13 45.206736924   19.35 19.10   18.75 ~ 7 0
40 OGLE LMC-SC6 104359 RR* 05 20 32.52 -69 17 01.5   19.45 19.33   18.78 ~ 5 0
41 OGLE LMC-SC6 112251 RR* 05 20 33.2437739496 -69 13 34.197637368   19.69 19.23   18.74 ~ 8 0
42 OGLE J052039.40-691709.0 RR* 05 20 39.28 -69 17 08.9   19.81 19.05   19.13 ~ 5 0
43 OGLE LMC-SC6 224156 RR* 05 20 44.4698064576 -69 17 26.153701584   19.66 19.32   18.87 ~ 7 0
44 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15990 1
45 OGLE LMC-SC3 202798 RR* 05 28 22.5248882544 -69 35 29.918330304   19.84 19.42   18.86 ~ 6 0
46 OGLE LMC-SC3 208824 RR* 05 28 22.85 -69 33 10.7   19.73 19.40   18.82 ~ 6 0
47 OGLE LMC-SC3 209645 RR* 05 28 27.10 -69 33 47.7   20.39 20.06   19.71 ~ 3 0
48 OGLE LMC-SC3 209128 RR* 05 28 29.0691617016 -69 32 01.180952988   19.64 19.30   18.70 ~ 7 0
49 OGLE LMC-SC3 204278 RR* 05 28 29.17 -69 34 42.1   20.23 19.80   19.12 ~ 5 0
50 OGLE LMC-SC3 208751 RR* 05 28 34.59 -69 33 26.5   19.60 19.37   18.79 ~ 5 0
51 OGLE LMC-SC3 312919 RR* 05 28 54.2788549488 -69 34 03.850171752   19.82 19.40   18.73 ~ 7 0
52 OGLE LMC-RRLYR-19031 RR* 05 33 42.1095727080 -70 49 40.885867344     18.95   18.816 ~ 6 0
53 OGLE LMC-RRLYR-19104 RR* 05 33 52.9300471320 -70 48 56.765990736     19.20   18.744 ~ 7 0
54 OGLE LMC-SC1 198285 RR* 05 34 18.7696103016 -70 23 09.703404924   20.01 19.59   19.00 ~ 8 0
55 OGLE LMC-SC1 192823 RR* 05 34 30.50 -70 25 42.4   19.77 19.39   18.87 ~ 7 0
56 OGLE LMC-SC1 277529 RR* 05 34 35.34 -70 23 56.5   19.72 19.38   18.85 ~ 6 0
57 OGLE LMC-SC1 276998 RR* 05 34 43.01 -70 25 43.8   19.60 19.39   18.96 ~ 5 0
58 OGLE LMC-SC1 277052 RR* 05 35 00.6200595552 -70 25 33.080003904   19.79 19.48   18.90 ~ 7 0
59 OGLE LMC-SC1 276327 RR* 05 35 04.3959640536 -70 24 44.969164488   19.83 19.35   18.76 ~ 8 0
60 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3229 0
61 V* RR Lyr RR* 19 25 27.9129605304 +42 47 03.693258204   7.36   7.6   kA3hF0 893 0
62 MACHO 79.5628.1300 Lev ~ ~     19.42     ~ 3 0
63 MACHO 11.8622.757 RR* ~ ~     19.11     ~ 3 0
64 NAME Local Group GrG ~ ~           ~ 7638 0
65 MACHO 79.5507.1580 RR* ~ ~     19.46     ~ 3 0

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2022.05.21-03:05:05

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