J-PLUS: Analysis of the intracluster light in the Coma cluster

被引：34

作者：

Jimenez-Teja, Y. ^{[1
,2
]}

Dupke, R. A. ^{[1
,2
,3
,4
]}

Lopes de Oliveira, R. ^{[1
,5
,6
,7
]}

Xavier, H. S. ^{[8
]}

Coelho, P. R. T. ^{[8
]}

Chies-Santos, A. L. ^{[9
]}

Lopez-Sanjuan, C. ^{[10
]}

Alvarez-Candal, A. ^{[1
]}

Costa-Duarte, M. V. ^{[8
]}

Telles, E. ^{[1
]}

Hernandez-Jimenez, J. A. ^{[8
]}

Benitez, N. ^{[2
]}

Alcaniz, J. ^{[1
]}

Cenarro, J. ^{[10
]}

Cristobal-Hornillos, D. ^{[10
]}

Ederoclite, A. ^{[10
]}

Marin-Franch, A. ^{[10
]}

Mendes de Oliveira, C. ^{[8
]}

Moles, M. ^{[10
]}

Sodre, L., Jr. ^{[8
]}

Varela, J. ^{[10
]}

Vazquez Ramio, H. ^{[10
]}

机构：

[1] Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil

[2] Inst Astrofis Andalucia, Glorieta Astron S-N, Granada 18008, Spain

[3] Univ Alabama, Dept Phys & Astron, Box 870324, Tuscaloosa, AL 35487 USA

[4] Univ Michigan, Dept Astron, 311 West Hall,1085 South Univ Ave, Ann Arbor, MI 48109 USA

[5] NASA Goddard Space Flight Ctr, Xray Astrophys Lab, Greenbelt, MD 20771 USA

[6] Univ Maryland Baltimore Cty, Dept Phys, 1000 Hilltop Circle, Baltimore, MD 21250 USA

[7] Univ Fed Sergipe, Dept Fis, Ave Marechal Rondon S-N, BR-49000000 Sao Cristovao, SE, Brazil

[8] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, BR-05508090 Sao Paulo, Brazil

[9] Univ Fed Rio Grande do Sul, Inst Fis, Dept Astron, Porto Alegre, RS, Brazil

[10] CSIC, Ctr Estudios Fis Cosmos Aragon, Plaza San Juan 1, Teruel 44001, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2019年 / 622卷

基金：

美国安德鲁·梅隆基金会;

关键词：

galaxies: clusters: individual: Coma; techniques: image processing; VELOCITY DISPERSIONS; INTERGALACTIC MATTER; RADIO OBSERVATIONS; DYNAMICAL STATE; DIFFUSE LIGHT; DARK-MATTER; GALAXIES; PHOTOMETRY; HALO; SEXTRACTOR;

D O I：

10.1051/0004-6361/201833547

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The intracluster light (ICL) is a luminous component of galaxy clusters composed of stars that are gravitationally bound to the cluster potential, but do not belong to the individual galaxies. Previous studies of the ICL have shown that its formation and evolution are intimately linked to the evolutionary stage of the cluster. Thus, the analysis of the ICL in the Coma cluster will give insights into the main processes driving the dynamics in this highly complex system. Aims. Using a recently developed technique, we measure the ICL fraction in Coma at several wavelengths, using the J-PLUS unique filter system. The combination of narrow- and broadband filters provides valuable information on the dynamical state of the cluster, the ICL stellar types, and the morphology of the diffuse light. Methods. We used the Chebyshev-Fourier intracluster light estimator (CICLE) to distinguish the ICL from the light of the galaxies, and to robustly measure the ICL fraction in seven J-PLUS filters. Results. We obtain the ICL fraction distribution of the Coma cluster at different optical wavelengths, which varies from similar to 7%-21%, showing the highest values in the narrowband filters J0395, J0410, and J0430. This ICL fraction excess is a distinctive pattern that has recently been observed in dynamically active clusters (mergers), indicating a higher amount of bluer stars in the ICL than in cluster galaxies. Conclusions. The high ICL fractions and the excess in the bluer filters are indicative of a merging state. The presence of younger stars or stars with lower metallicity in the ICL suggests that the main mechanism of ICL formation for the Coma cluster is the stripping of the stars in the outskirts of infalling galaxies and possibly the disruption of dwarf galaxies during past or ongoing mergers.

引用

页数：9

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