2008A&A...481..441G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.02CEST14:56:36

2008A&A...481..441G - Astronomy and Astrophysics, volume 481, 441-448 (2008/4-2)

The distance to the Galactic centre based on Population II Cepheids and RR Lyrae stars.

GROENEWEGEN M.A.T., UDALSKI A. and BONO G.

Abstract (from CDS):

The distance to the Galactic centre (GC) is important for determining the distance scale in the Universe. The value derived by Eisenhauer et al. (2005ApJ...628..246E) of 7.62±0.32kpc based on the orbit of one star around the central black hole is shorter than most other distance estimates based on a variety of different methods. To establish an independent distance to the GC with high accuracy, Population-II Cepheids were used that have been discovered in the OGLE-II and OGLE-III surveys. Thirty-nine Population-ii Cepheids were monitored with the SOFI infrared camera on 4 nights spanning 14 days, typically obtaining between 5 and 11 epochs of data. Light curves were fitted using the known periods from the OGLE data to determine the mean K-band magnitude with an accuracy of 0.01-0.02mag. It so happens that 37 RR Lyrae stars are in the field-of-view of the observations, and mean K-band magnitudes are derived for this sample as well. After correction for reddening, the period-luminosity relation of Population-ii Cepheids in the K-band is determined, and the derived slope of -2.24±0.14 is consistent with the value derived by Matsunaga et al. (2006MNRAS.370.1979M). Fixing the slope to their more accurate value results in a zero point and implies a distance modulus to the GC of 14.51±0.12, with an additional systematic uncertainty of 0.07mag. Similarly, from the RR Lyrae K-band period-luminosity relation, we derive a value of 14.48±0.17(random)±0.07(syst.). The two independent determinations are averaged to find 14.50±0.10(random)±0.07(syst.), or 7.94±0.37±0.26kpc. The absolute magnitude scale of the adopted period-luminosity relations is tied to an LMC distance modulus of 18.50±0.07.

Abstract Copyright:

Journal keyword(s): stars: distances - stars: variables: Cepheids - stars: variables: RR Lyrae - Galaxy: bulge - Galaxy: center

Nomenclature: Table 1: [GUB2008] bulNNN.N NNNNNN N=10.

CDS comments: Table 1: Objects bulNN NNNNNN = OGLEII DIA BUL-SCNN NNNNNN in SIMBAD.

Simbad objects: 81

goto Full paper

goto View the reference in ADS

Number of rows : 81

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 OGLE BUL-SC3 250926 RR* 01 11 33.85 -30 12 22.7     17.76   16.23 ~ 2 0
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5664 1
3 NAME Ret GlC 04 36 11.4 -58 51 47   14.00 14.25 13.50   ~ 144 1
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14824 1
5 OGLE BUL-SC43 130470 RR* 17 35 00.8565558358 -27 31 41.164487022     19.19   16.83 ~ 6 0
6 V* V2736 Oph WV* 17 35 08.1125322823 -27 31 26.028148213     18.533   16.251 ~ 5 0
7 OGLE BLG-T2CEP-23 WV* 17 36 34.0196477984 -27 18 08.537349743     16.156   13.604 ~ 5 0
8 OGLE BLG-T2CEP-28 WV* 17 40 50.7496095416 -25 03 53.377843625     19.092   16.827 ~ 5 0
9 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11532 0
10 [EG97] S2 *i* 17 45 40.0442 -29 00 27.975           B0/2V 272 1
11 OGLE BLG501.16 16646 RR* 17 49 22.4261992849 -29 51 41.905280618         18.602 ~ 5 0
12 V* V5597 Sgr WV* 17 49 30.9584432879 -29 50 58.498020586     21.330   16.891 ~ 5 0
13 V* V5599 Sgr WV* 17 50 21.4945057003 -29 54 27.956982650     19.500   16.436 ~ 5 0
14 OGLE BLG100.6 93691 RR* 17 50 24.8280021207 -29 53 19.060349210     21.763   18.252 ~ 5 0
15 OGLE BUL-SC40 107313 RR* 17 50 49.12 -33 07 54.5     18.352   16.459 ~ 6 0
16 V* V1521 Sco WV* 17 50 58.9560961881 -33 08 53.225337017     16.716   14.597 ~ 5 0
17 OGLE BUL-SC40 259253 RR* 17 51 03.1657628837 -33 09 07.140685045     18.315   16.721 ~ 6 0
18 V* V1522 Sco WV* 17 51 42.4491327155 -32 41 41.433650048     16.709   14.622 ~ 5 0
19 OGLE BLG-CEP-10 WV* 17 51 54.349 -31 56 39.48     17.316   15.105 ~ 3 0
20 OGLE BLG180.5 165480 WV* 17 51 57.5722272249 -30 21 39.645987822     16.966   14.385 ~ 5 0
21 V* V1524 Sco WV* 17 53 27.8602690705 -30 19 55.114808451     17.640   16.130 ~ 6 0
22 OGLE BLG501.2 76057 RR* 17 53 30.5443875224 -30 18 13.844777518     18.633   16.602 ~ 6 0
23 OGLE BUL-SC24 369931 RR* 17 53 34.02 -32 58 08.9     17.435   15.774 ~ 6 0
24 V* V1525 Sco WV* 17 53 34.8038966499 -30 12 39.932513758     16.870   14.855 ~ 5 0
25 OGLE BLG148.3 144878 RR* 17 53 37.9330855173 -32 55 34.498660272     17.969   16.22 ~ 6 0
26 OGLE BLG195.4 208374 WV* 17 53 40.6871259131 -28 56 46.844232905     17.162   14.696 ~ 4 0
27 V* V1526 Sco RR* 17 53 44.3579128048 -32 57 14.318188823     17.707   16.041 ~ 6 0
28 OGLEII DIA BUL-SC24 1609 WV* 17 53 44.41 -32 57 14.0           ~ 1 0
29 V* V5607 Sgr WV* 17 54 06.5996340463 -29 16 22.266251116     17.300   14.947 ~ 5 0
30 OGLE BLG149.7 10334 RR* 17 54 16.7935895773 -33 09 03.123833220     17.842   16.166 ~ 6 0
31 V* V1528 Sco WV* 17 54 24.3240554872 -33 06 51.342523956     16.183   14.186 ~ 5 0
32 OGLE BUL-SC4 207388 RR* 17 54 35.0420185881 -30 10 44.558948944     17.781   16.008 ~ 6 0
33 OGLE BUL-SC4 207615 RR* 17 54 35.13 -30 09 42.7     17.839   16.199 ~ 6 0
34 V* V1529 Sco WV* 17 54 38.21 -30 10 41.8     16.743   14.962 ~ 3 0
35 OGLE BLG-RRLYR-7093 RR* 17 54 48.6906767706 -29 57 36.217209972     17.826 17.15 16.22 ~ 8 0
36 V* V5609 Sgr WV* 17 54 55.5488584752 -29 57 31.324022262     16.881   15.071 ~ 4 0
37 V* V1530 Sco WV* 17 55 12.3835921537 -30 07 24.507160821     16.274   14.408 ~ 4 0
38 OGLE BUL-SC39 156007 RR* 17 55 12.7407263891 -29 33 24.571720919     17.530 16.73 15.934 ~ 8 0
39 OGLE BUL-SC39 15393 RR* 17 55 14.77 -30 09 32.9     17.727   16.332 ~ 6 0
40 OGLE BUL-SC39 15358 RR* 17 55 16.2673525065 -30 06 06.505838975     17.767   16.099 ~ 6 0
41 V* V5613 Sgr WV* 17 55 23.1189764224 -29 31 35.476436342     15.086   13.250 ~ 6 0
42 V* V5615 Sgr WV* 17 56 05.0557643101 -29 54 52.224899874     18.109   15.98 ~ 5 0
43 OGLE BLG214.6 62049 WV* 17 56 15.6932505512 -28 14 01.769539219     18.500 17.34 16.268 ~ 6 1
44 OGLE BUL-SC22 133009 RR* 17 56 22.2753129527 -30 38 10.517796643     18.379   16.462 ~ 6 0
45 OGLE BUL-SC22 144794 RR* 17 56 26.4790750175 -30 36 16.577108679     19.234   16.889 ~ 5 0
46 OGLE BLG181.3 100613 RR* 17 56 29.8963485966 -30 35 37.929512019     18.647   16.532 ~ 6 0
47 V* V1531 Sco WV* 17 56 33.0683628878 -30 36 34.063262357     18.101   15.952 ~ 5 0
48 OGLE BLG-T2CEP-200 WV* 17 56 37.6986865117 -28 01 27.943655125     17.674   15.062 ~ 6 0
49 OGLE BLG172.3 230788 RR* 17 56 41.5888910748 -31 06 17.293727227     15.816   14.366 ~ 6 0
50 OGLE BLG507.30 131533 WV* 17 56 46.51 -31 07 07.9     17.050   14.918 ~ 2 0
51 OGLE BLG172.3 231207 RR* 17 56 48.3566139517 -31 05 53.473632311     17.724   16.096 ~ 6 0
52 [GUB2008] bul214.2 135 WV* 17 57 35.12 -28 26 11.6           ~ 1 0
53 OGLE BLG-RRLYR-8941 RR* 17 57 57.3612726752 -29 00 01.125282285     18.069 17.14 16.231 ~ 8 0
54 OGLE BLG-RRLYR-8970 RR* 17 57 59.6417562524 -29 00 58.837705784     18.436 17.29 16.452 ~ 8 0
55 OGLE BLG-RRLYR-8985 RR* 17 58 01.2737497700 -28 58 27.211293039     17.780 17.14 16.132 ~ 8 0
56 V* V5617 Sgr WV* 17 58 01.53 -28 59 56.6           ~ 1 0
57 OGLE BUL-SC34 389919 RR* 17 58 06.29 -29 01 48.9     17.845 16.93 16.059 ~ 7 0
58 V* V5619 Sgr WV* 17 58 14.6143253370 -31 33 24.341938543     16.198   14.631 ~ 4 0
59 OGLE BLG215.7 131724 WV* 17 58 54.5030626145 -28 21 30.473001274     16.339   14.783 ~ 5 0
60 OGLE BUL-SC20 44361 RR* 17 58 55.2510854145 -29 10 17.017068476     17.880 17.20 16.413 ~ 8 0
61 V* V5621 Sgr WV* 17 58 55.9022804348 -28 43 19.379828830     15.552   13.864 ~ 4 0
62 V* V2434 Sgr WV* 17 58 55.9078532643 -29 10 57.095868635     15.596   14.197 ~ 7 0
63 V* V2437 Sgr RR* 17 58 59.0762382857 -29 10 30.135028822     16.977 16.55 15.679 ~ 10 0
64 OGLE BLG188.1 58676 WV* 17 59 30.7372015649 -30 20 00.157772423     16.893   15.111 ~ 5 0
65 V* V2469 Sgr WV* 17 59 53.4892247342 -28 56 37.584113847     16.299   14.836 ~ 8 0
66 V* V5625 Sgr WV* 18 01 32.6809324505 -29 49 11.981135096     15.671   14.003 ~ 5 0
67 V* V5626 Sgr WV* 18 01 47.30 -29 07 39.2     15.648   14.180 ~ 3 0
68 OGLE BUL-SC30 604974 RR* 18 01 53.1604354726 -29 09 06.508064976     17.290   15.877 ~ 6 0
69 OGLE BLG-RRLYR-11294 WV* 18 01 56.8888858647 -28 55 11.729539807     16.672   15.323 ~ 4 0
70 OGLE BLG-RRLYR-11306 RR* 18 01 58.2353130051 -28 56 37.423322877     16.686 15.94 15.394 ~ 8 0
71 OGLE BUL-SC31 680405 RR* 18 02 51.5733874808 -28 39 39.351849786     17.442   15.892 ~ 6 0
72 V* V5629 Sgr WV* 18 02 56.0215777019 -28 40 39.369185255     16.210   14.865 ~ 5 0
73 OGLE BUL-SC32 87588 RR* 18 03 01.0171326790 -28 41 18.828315635     17.123   15.667 ~ 6 0
74 V* V1426 Sgr RR* 18 03 23.2766524264 -30 02 47.392318152     16.620 16.37 15.692 ~ 22 0
75 V* V1437 Sgr WV* 18 03 33.6230387622 -30 01 15.038386399     15.648   14.437 A7 18 0
76 OGLE BLG-RRLYR-12108 RR* 18 03 34.2761737761 -30 01 44.877976682     16.715   15.597 ~ 5 0
77 OGLE BLG-RRLYR-12117 RR* 18 03 35.2248687225 -30 01 24.962553739     16.773 16.44 15.689 ~ 13 0
78 V* V5630 Sgr WV* 18 04 19.8541516100 -29 02 44.380365208     14.914   13.386 ~ 5 0
79 V* V1821 Sgr cC* 18 08 44.3780344527 -32 13 11.225750795     13.800   12.662 ~ 6 0
80 V* RR Lyr RR* 19 25 27.9123232234 +42 47 03.690634101   7.36   7.6   A8-F7 880 0
81 NAME Galactic Bulge reg ~ ~           ~ 3387 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2008A&A...481..441G and select 'bookmark this link' or equivalent in the popup menu


2020.07.02-14:56:36

© Université de Strasbourg/CNRS

    • Contact