Euclid: Early Release Observations - Unveiling the morphology of two Milky Way globular clusters out to their periphery☆

被引：8

作者：

Massari, D. ^{[1
]}

Dalessandro, E. ^{[1
]}

Erkal, D. ^{[2
]}

Balbinot, E. ^{[3
,4
]}

Bovy, J. ^{[5
]}

McDonald, I ^{[6
]}

Ferguson, A. M. N. ^{[7
]}

Larsen, S. S. ^{[8
]}

Lancon, A. ^{[11
]}

Annibali, F. ^{[1
]}

Goldman, B. ^{[9
,11
]}

Kuzma, P. B. ^{[7
,10
]}

Voggel, K. ^{[11
]}

Saifollahi, T. ^{[4
,11
]}

Cuillandre, J. -C. ^{[12
]}

Schirmer, M. ^{[13
]}

Kluge, M. ^{[14
]}

Altieri, B. ^{[15
]}

Amara, A. ^{[2
]}

Andreon, S. ^{[16
]}

Auricchio, N. ^{[1
]}

Baldi, M. ^{[1
,17
,18
]}

Balestra, A. ^{[19
]}

Bardelli, S. ^{[1
]}

Basset, A. ^{[20
]}

Bender, R. ^{[14
,21
]}

Bonino, D. ^{[22
]}

Branchini, E. ^{[16
,23
,24
]}

Brescia, M. ^{[25
,26
,27
]}

Brinchmann, J. ^{[28
]}

Camera, S. ^{[22
,29
,30
]}

Candini, G. P. ^{[31
]}

Capobianco, V ^{[22
]}

Carbone, C. ^{[32
]}

Carlberg, R. G. ^{[5
]}

Carretero, J. ^{[33
,34
]}

Casas, S. ^{[35
]}

Castellano, M. ^{[36
]}

Cavuoti, S. ^{[26
,27
]}

Cimatti, A. ^{[37
]}

Congedo, G. ^{[7
]}

Conselice, C. J. ^{[6
]}

Conversi, L. ^{[15
,38
]}

Copin, Y. ^{[39
]}

Corcione, L. ^{[22
]}

Courbin, F. ^{[40
]}

Courtois, H. M. ^{[41
]}

Degaudenzi, H. ^{[42
]}

Dinis, J. ^{[43
,44
]}

Dubath, F. ^{[42
]}

机构：

[1] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Piero Gobetti 93-3, I-40129 Bologna, Italy

[2] Univ Surrey, Sch Math & Phys, Guildford GU2 7XH, Surrey, England

[3] Leiden Univ, Leiden Observ, Einsteinweg 55, NL-2333 CC Leiden, Netherlands

[4] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands

[5] Univ Toronto, David A Dunlap Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[6] Univ Manchester, Jodrell Bank Ctr Astrophys, Dept Phys & Astron, Oxford Rd, Manchester M13 9PL, Lancs, England

[7] Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[8] Radboud Univ Nijmegen, Dept Astrophys IMAPP, POB 9010, NL-6500 GL Nijmegen, Netherlands

[9] Int Space Univ, 1 Rue Jean Dominique Cassini, F-67400 Illkirch Graffenstaden, France

[10] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[11] Univ Strasbourg, CNRS, Observ Astron Strasbourg, UMR 7550, F-67000 Strasbourg, France

[12] Univ Paris Cite, Univ Paris Saclay, CEA, CNRS,AIM, F-91191 Gif Sur Yvette, France

[13] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[14] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

[15] ESAC ESA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[16] INAF Osservatorio Astron Brera, Via Brera 28, I-20122 Milan, Italy

[17] Univ Bologna, Dipartimento Fis & Astron, Via Gobetti 93-2, I-40129 Bologna, Italy

[18] INFN, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[19] INAF Osservatorio Astron Padova, Via Osservatorio 5, I-35122 Padua, Italy

[20] Ctr Spatial Toulouse, Ctr Natl Etud Spatiales, 18 Ave Edouard Belin, F-31401 Toulouse 9, France

[21] Ludwig Maximilians Univ Munchen, Univ Sternwarte Munchen, Fak Phys, Scheinerstr 1, D-81679 Munich, Germany

[22] INAF Osservatorio Astrofis Torino, Via Osservatorio 20, I-10025 Pino Torinese, TO, Italy

[23] Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy

[24] INFN, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy

[25] Univ Federico II, Dept Phys E Pancini, Via Cinthia 6, I-80126 Naples, Italy

[26] INAF Osservatorio Astron Capodimonte, Via Moiariello 16, I-80131 Naples, Italy

[27] INFN, Sect Naples, Via Cinthia 6, I-80126 Naples, Italy

[28] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal

[29] Univ Torino, Dipartimento Fis, Via P Giuria 1, I-10125 Turin, Italy

[30] INFN, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy

[31] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England

[32] INAF IASF Milano, Via Alfonso Corti 12, I-20133 Milan, Italy

[33] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Campus UAB, Barcelona 08193, Spain

[34] Port Informacio Cient, Campus UAB,C Albareda S-N, Barcelona 08193, Spain

[35] Rhein Westfal TH Aachen, Inst Theoret Particle Phys & Cosmol TTK, D-52056 Aachen, Germany

[36] INAF Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy

[37] Alma Mater Studiorum Univ Bologna, Dipartimento Fis & Astron Augusto Righi, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[38] European Space Agcy ESRIN, Largo Galileo Galilei 1, I-00044 Rome, Italy

[39] Univ Claude Bernard Lyon 1, CNRS, IN2P3, IP2I Lyon,UMR 5822, F-69100 Villeurbanne, France

[40] EPFL, Astrophys Lab, Inst Phys, Observ Sauverny, CH-1290 Versoix, Switzerland

[41] UCB Lyon 1, CNRS, IN2P3, IUF,IP2I Lyon, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France

[42] Univ Geneva, Dept Astron, Ch Ecogia 16, CH-1290 Versoix, Switzerland

[43] Univ Lisbon, Dept Fis, Fac Ciencias, Edificio C8, P-1749016 Lisbon, Portugal

[44] Univ Lisbon, Inst Astrofis & Ciencias Espaco, Fac Ciencias, P-1749016 Lisbon, Portugal

[45] INFN Padova, Via Marzolo 8, I-35131 Padua, Italy

[46] INAF Ist Astrofis & Planetol Spaziali, Via Fosso Cavaliere 100, I-00100 Rome, Italy

[47] INAF Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy

[48] Ist Nazl Fis Nucl, Sez Bologna, Via Irnerio 46, I-40126 Bologna, Italy

[49] Univ Milan, Dipartimento Fis Aldo Pontremoli, Via Celoria 16, I-20133 Milan, Italy

[50] INFN, Sez Milano, Via Celoria 16, I-20133 Milan, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2025年 / 697卷

基金：

美国国家航空航天局; 欧盟地平线“2020”;

关键词：

stars: imaging; Galaxy: evolution; globular clusters: general; Galaxy: structure; globular clusters: individual: NGC 6254; globular clusters: individual: NGC 6397; DIGITAL SKY SURVEY; UV LEGACY SURVEY; TIDAL TAILS; MAIN-SEQUENCE; MULTIPLE POPULATIONS; STELLAR STREAM; ACS SURVEY; GAIA EDR3; DISCOVERY; MASS;

D O I：

10.1051/0004-6361/202449696

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

As part of the Euclid Early Release Observations (ERO) programme, we analysed deep, wide-field imaging from the VIS and NISP instruments of two Milky Way globular clusters (GCs), namely NGC 6254 (M10) and NGC 6397, to look for observational evidence of their dynamical interaction with the Milky Way. We searched for such an interaction in the form of structural and morphological features in the clusters' outermost regions, which would be suggestive of the development of tidal tails on scales larger than those sampled by the ERO data. From our multi-band photometric analysis, we obtained deep and well-behaved colour-magnitude diagrams that, in turn, enabled an accurate membership selection. The surface brightness profiles built from these samples of member stars are the deepest ever obtained for these two Milky Way GCs, reaching down to similar to 30.0 mag/arcsec(2), which is similar to 1.5 mag/arcsec(2) lower than before. The investigation of the two-dimensional density map of NGC 6254 reveals an elongated morphology of the cluster peripheries in the direction and with the amplitude predicted by N-body simulations of the cluster's dynamical evolution, at high statistical significance. We interpret this as strong evidence for the first detection of tidally induced morphological distortion around this cluster. The density map of NGC 6397 reveals a slightly elliptical morphology, in agreement with previous studies, which requires further investigation on larger scales to be properly interpreted. This ERO project thus demonstrates the power of Euclid in studying the outer regions of GCs at an unprecedented level of detail, thanks to the combination of the large field of view, high spatial resolution, and depth enabled by the telescope. Our results highlight the future Euclid survey as the ideal dataset for investigating GC tidal tails and stellar streams.

引用

页数：15

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