THE ABSOLUTE AGE OF THE GLOBULAR CLUSTER M15 USING NEAR-INFRARED ADAPTIVE OPTICS IMAGES FROM PISCES/LBT

被引：18

作者：

Monelli, M. ^{[1
,2
]}

Testa, V. ^{[3
]}

Bono, G. ^{[3
,4
]}

Ferraro, I. ^{[3
]}

Iannicola, G. ^{[3
]}

Fiorentino, G. ^{[5
]}

Arcidiacono, C. ^{[5
,6
]}

Massari, D. ^{[5
,7
]}

Boutsia, K. ^{[3
]}

Briguglio, R. ^{[6
]}

Busoni, L. ^{[6
]}

Carini, R. ^{[3
]}

Close, L. ^{[8
]}

Cresci, G. ^{[5
]}

Esposito, S. ^{[6
]}

Fini, L. ^{[6
]}

Fumana, M. ^{[9
]}

Guerra, J. C. ^{[10
]}

Hill, J. ^{[10
]}

Kulesa, C. ^{[8
]}

Mannucci, F. ^{[6
]}

McCarthy, D. ^{[8
]}

Pinna, E. ^{[6
]}

Puglisi, A. ^{[6
]}

Quiros-Pacheco, F. ^{[6
]}

Ragazzoni, R. ^{[11
]}

Riccardi, A. ^{[6
]}

Skemer, A. ^{[8
]}

Xompero, M. ^{[6
]}

机构：

[1] Inst Astrofis Canarias, Tenerife, Spain

[2] Univ La Laguna, Dept Astrofis, Tenerife, Spain

[3] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy

[4] Univ Roma Tor Vergata, I-00133 Rome, Italy

[5] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy

[6] Osservatorio Astron Arcetri, INAF, I-50125 Florence, Italy

[7] Univ Groningen, Kapteyn Astron Inst, NL-9747 AD Groningen, Netherlands

[8] Univ Arizona, Dept Astron, Steward Observ, Tucson, AZ 85721 USA

[9] INAF IASF, I-20133 Milan, Italy

[10] Univ Arizona, LBT Observ, Tucson, AZ 85721 USA

[11] Oservatorio Astron Padova, INAF, I-35122 Padua, Italy

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 812卷 / 01期

关键词：

globular clusters: general; globular clusters: individual (M15); techniques: photometric; HUBBLE-SPACE-TELESCOPE; COLLISION-INDUCED ABSORPTION; STELLAR EVOLUTION DATABASE; DOUBLE SUBGIANT BRANCH; COLOR-MAGNITUDE; MAIN-SEQUENCE; WIDE-FIELD; ACS SURVEY; POPULATION SYNTHESIS; OMEGA-CENTAURI;

D O I：

10.1088/0004-637X/812/1/25

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present deep near-infrared J, K-s photometry of the old, metal-poor Galactic globular cluster M15 obtained with images collected with the LUCI1 and PISCES cameras available at the Large Binocular Telescope (LBT). We show how the use of First Light Adaptive Optics. (FLAO) system coupled with the PISCES camera allows us to improve the limiting magnitude by similar to 2 mag in K-s. By analyzing archival Hubble Space Telescope data, we demonstrate that the quality of the LBT/PISCES color-magnitude diagram is fully comparable with analogous space-based data. The smaller field of view is balanced by the shorter exposure time required to reach a similar photometric limit. We investigated the absolute age of M15 by means of two methods: (i) by determining the age from the position of the main-sequence turnoff (MSTO),. and (ii) by the magnitude difference between the MSTO and the well-defined knee detected along the faint portion of the MS. We derive consistent values of the absolute age of M15, that is, 12.9 +/- 2.6 Gyr and 13.3 +/- 1.1 Gyr, respectively.

引用

页数：12

共 5 条

[1] Pushing the limits of near-infrared photometry with the Gemini Multi-Conjugate Adaptive Optics System: study of crowded fields in the globular cluster M5
Kumar, Tarun
Turri, Paolo
Venn, Kim A.
Andersen, David R.
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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2024, 531 (01) : 602 - 616
[2] Properties of the Young Milky Way globular cluster Whiting 1 from near-infrared photometry
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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 446 (01) : 730 - 736
[3] Modelling of integrated-light spectra from the optical to the near-infrared: the globular cluster G280 in M31
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ASTRONOMY & ASTROPHYSICS, 2018, 617
[4] ON THE DISTANCE OF THE GLOBULAR CLUSTER M4 (NGC 6121) USING RR LYRAE STARS. I. OPTICAL AND NEAR-INFRARED PERIOD-LUMINOSITY AND PERIOD-WESENHEIT RELATIONS
Braga, V. F.
Dall'Ora, M.
Bono, G.
Stetson, P. B.
Ferraro, I.
Iannicola, G.
Marengo, M.
Neeley, J.
Persson, S. E.
Buonanno, R.
Coppola, G.
Freedman, W.
Madore, B. F.
Marconi, M.
Matsunaga, N.
Monson, A.
Rich, J.
Scowcroft, V.
Seibert, M.
ASTROPHYSICAL JOURNAL, 2015, 799 (02)
[5] Properties of young star cluster systems: the age signature from near-infrared integrated colours
Santos, J. F. C., Jr.
Dottori, H.
Grosbol, P.
ASTRONOMY & ASTROPHYSICS, 2013, 553

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