2010A&A...510A..19L


Query : 2010A&A...510A..19L

2010A&A...510A..19L - Astronomy and Astrophysics, volume 510, A19-19 (2010/2-1)

Integrated K-band spectra of old and intermediate-age globular clusters in the Large Magellanic Cloud.

LYUBENOVA M., KUNTSCHNER H., REJKUBA M., SILVA D.R., KISSLER-PATIG M., TACCONI-GARMAN L.E. and LARSEN S.S.

Abstract (from CDS):

Current stellar population models have arguably the largest uncertainties in the near-IR wavelength range, partly due to a lack of large and well calibrated empirical spectral libraries. In this paper we present a project whose aim it is to provide the first library of luminosity weighted integrated near-IR spectra of globular clusters to be used to test the current stellar population models and serve as calibrators for future ones. Our pilot study presents spatially integrated K-band spectra of three old (≥10Gyr) and metal poor ([Fe/H]~-1.4), and three intermediate age (1-2Gyr) and more metal rich ([Fe/H]~-0.4) globular clusters in the LMC. We measured the line strengths of the NaI, CaI and 12CO(2-0) absorption features. The NaI index decreases with increasing age and decreasing metallicity of the clusters. The DCO index, used to measure the 12CO(2-0) line strength, is significantly reduced by the presence of carbon-rich TP-AGB stars in the globular clusters with age ∼1Gyr. This is in contradiction to the predictions of the stellar population models of Maraston (2005MNRAS.362..799M). We find that this disagreement is due to the different CO absorption strength of carbon-rich Milky Way TP-AGB stars used in the models and the LMC carbon stars in our sample. For globular clusters with age ≥2Gyr we find DCO index measurements consistent with the model predictions.

Abstract Copyright:

Journal keyword(s): Magellanic Clouds - stars: carbon - galaxies: star clusters

VizieR on-line data: <Available at CDS (J/A+A/510/A19): clusters.dat sp/*>

Simbad objects: 59

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Number of rows : 59
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7056 0
2 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 1819 0
3 2MASS J04540127-7026341 LP* 04 54 01.2934744032 -70 26 34.243327500     16.99 15.76 14.227 ~ 6 0
4 2MASS J04540536-7025202 * 04 54 05.3835576192 -70 25 20.336495556           ~ 2 0
5 [KDM2001] 882 C* 04 54 07.7425243968 -70 24 40.039507332     16.91 15.188 14.868 C 8 0
6 [SBK2010] NGC1754-29 * 04 54 09.3762147144 -70 24 56.820471876           ~ 3 0
7 2MASS J04541188-7028201 * 04 54 11.9007268632 -70 28 20.244148248           ~ 2 0
8 NGC 1754 Cl* 04 54 18.080 -70 26 32.58   12.32 11.57     ~ 93 0
9 2MASS J04542864-7026142 LP* 04 54 28.6577016504 -70 26 14.321340384     16.42 15.65   ~ 4 0
10 2MASS J04543522-7027503 LP* 04 54 35.2471202928 -70 27 50.471341956     16.69 15.055   ~ 4 0
11 V* R Lep C* 04 59 36.3486921120 -14 48 22.502479140 15.06 13.51 7.76 4.90 3.42 C7,6e 339 0
12 [KDM2001] 1528 C* 05 01 58.9858613328 -67 59 38.721812316     16.93 14.461 14.300 C 10 0
13 [KDM2001] 1538 C* 05 02 05.3800087464 -68 00 26.657681688     16.45 15.07 13.973 C 9 0
14 NGC 1806 GlC 05 02 11.180 -67 59 05.89   11.1       ~ 157 0
15 2MASS J05021121-6759295 * 05 02 11.216 -67 59 29.54           ~ 3 0
16 2MASS J05021137-6758401 LP* 05 02 11.3789653536 -67 58 40.107593784     16.200 14.568 14.328 M 9 0
17 2MASS J05021232-6759369 LP* 05 02 12.3345448488 -67 59 36.940443828     17.07 14.321 14.042 C 11 0
18 2MASS J05021623-6759332 LP* 05 02 16.2413360279 -67 59 33.208271524     15.36 13.745 13.544 M2 13 0
19 2MASS J05021846-6759048 LP* 05 02 18.4691061984 -67 59 04.790928984     15.75 14.324 14.103 M:: 10 0
20 2MASS J05021870-6758552 LP* 05 02 18.7222277760 -67 58 55.144852644     15.94 14.187 13.951 M 12 0
21 NAME LMC Bar PoG 05 22 08 -69 23.5           ~ 309 0
22 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17416 0
23 2MASS J05295466-6946014 LP* 05 29 54.6526528560 -69 46 01.407407952     16.488   14.237 ~ 4 0
24 2MASS J05295822-6944445 LP* 05 29 58.1981677992 -69 44 44.501758872     16.80 15.84   ~ 4 0
25 2MASS J05300360-6944311 * 05 30 03.5984004072 -69 44 31.165759032           ~ 2 0
26 2MASS J05300704-6944031 LP* 05 30 07.0544974976 -69 44 03.104074637     16.73 15.72 14.424 ~ 5 0
27 2MASS J05300708-6945327 LP* 05 30 07.0668554736 -69 45 32.707022832     16.203   14.154 ~ 3 0
28 NGC 2005 Cl* 05 30 08.500 -69 45 14.42   12.30 11.57     ~ 94 0
29 2MASS J05302221-6946124 LP* 05 30 22.2166771368 -69 46 12.443546856     17.525 13.951 13.853 ~ 6 0
30 [KDM2001] 4627 C* 05 31 38.6311215864 -70 10 09.294261960     16.17 13.990 13.884 C 9 0
31 2MASS J05315232-7010083 * 05 31 52.3434801432 -70 10 08.353611516           ~ 2 0
32 NGC 2019 Cl* 05 31 56.48 -70 09 32.5   10.9 10.86     ~ 122 0
33 2MASS J05320418-7008151 LP* 05 32 04.1991256848 -70 08 15.071464788     16.08 14.042 13.874 ~ 6 0
34 2MASS J05320670-7010248 LP* 05 32 06.7178899944 -70 10 24.789297396     16.47 13.728 13.557 ~ 9 0
35 2MASS J05321152-7010535 LP* 05 32 11.5490324616 -70 10 53.450594004     15.81 13.711 13.542 ~ 6 0
36 2MASS J05321647-7008272 LP* 05 32 16.4831967456 -70 08 27.219944940 19.536 17.941 16.201 14.076 13.604 ~ 8 0
37 HD 40624 * 05 54 56.9747437344 -65 53 00.643948800   7.90 7.92     A0V 16 0
38 2MASS J05563368-7257402 LP* 05 56 33.6769386528 -72 57 40.266712008       15.078   ~ 4 0
39 2MASS J05563892-7258155 LP* 05 56 38.9271985008 -72 58 15.520607112       14.540   ~ 3 0
40 2MASS J05565761-7254403 * 05 56 57.6029314224 -72 54 40.397683824           ~ 2 0
41 2MASS J05570233-7257449 LP* 05 57 02.3271664944 -72 57 45.029937204       14.818   ~ 3 0
42 2MASS J05572334-7256006 * 05 57 23.3412256992 -72 56 00.757054356           ~ 2 0
43 2MASS J05575667-7258299 RG* 05 57 56.6798605128 -72 58 29.900042148           ~ 3 0
44 2MASS J05575784-7257548 RG* 05 57 57.8443004424 -72 57 54.909572868           ~ 4 0
45 NGC 2173 GlC 05 57 58 -72 58.7   12.74 11.88     ~ 141 0
46 2MASS J05581142-7258328 LP* 05 58 11.4226254888 -72 58 32.892090528       14.970   ~ 5 0
47 2MASS J05583257-7258499 LP* 05 58 32.5610395560 -72 58 49.956718116       14.866   ~ 4 0
48 [KDM2001] 6977 C* 06 00 27.4879053840 -63 42 22.356351612           C 5 0
49 NGC 2162 GlC 06 00 30.21 -63 43 18.2   13.38 12.70     ~ 78 0
50 2MASS J06003156-6342581 * 06 00 31.5695957808 -63 42 58.196174292           ~ 2 0
51 2MASS J06003316-6342131 * 06 00 33.1616059824 -63 42 13.204102716           ~ 2 0
52 2MASS J06003869-6341393 LP? 06 00 38.7075471672 -63 41 39.422157072           ~ 3 0
53 * eta01 Dor SB* 06 06 09.3817676280 -66 02 22.635231936   5.679 5.690     A0V 77 0
54 * nu. Dor PM* 06 08 44.2617842848 -68 50 36.282383871   4.975 5.038     B8V 79 0
55 HD 44533 Be* 06 14 41.9418058464 -73 37 35.434849728   6.56 6.59     B8IVe 23 0
56 HD 45796 SB* 06 24 55.7976148920 -63 49 41.314485720   6.124 6.249     B6V 52 0
57 HD 46668 * 06 27 13.6449748512 -73 13 42.083926824   9.34 9.34     B8V 12 0
58 NGC 2477 OpC 07 52 11.0 -38 32 13   6.64 5.8     ~ 290 0
59 NAME Local Group GrG ~ ~           ~ 8378 0

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