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欧几里得:早期释放观测——perseus星系团中矮星系与球状星团的相互作用

Euclid: Early Release Observations -- Interplay between dwarf galaxies and their globular clusters in the Perseus galaxy cluster

T. Saifollahi, A. Lançon, Michele Cantiello, J. -C. Cuillandre, M. Bethermin, D. Carollo, P. -A. Duc, A. Ferré-Mateu, N. A. Hatch, M. Hilker, L. K. Hunt, F. R. … 展开作者

T. Saifollahi, A. Lançon, Michele Cantiello, J. -C. Cuillandre, M. Bethermin, D. Carollo, P. -A. Duc, A. Ferré-Mateu, N. A. Hatch, M. Hilker, L. K. Hunt, F. R. Marleau, J. Román, R. Sánchez-Janssen, C. Tortora, M. Urbano, K. Voggel, M. Bolzonella, H. Bouy, M. Kluge, M. Schirmer, C. Stone, C. Giocoli, J. H. Knapen, M. N. Le, M. Mondelin, N. Aghanim, B. Altieri, S. Andreon, N. Auricchio, C. Baccigalupi, D. Bagot, M. Baldi, A. Balestra, S. Bardelli, A. Basset, P. Battaglia, A. Biviano, A. Bonchi, D. Bonino, W. Bon, E. Branchini, M. Brescia, J. Brinchmann, S. Camera, V. Capobianco, C. Carbone, J. Carretero, S. Casas, M. Castellano, G. Castignani, S. Cavuoti, K. C. Chambers, A. Cimatti, C. Colodro-Conde, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, F. Courbin, H. M. Courtois, M. Cropper, A. Da Silva, H. Degaudenzi, G. De Lucia, H. Dole, M. Douspis, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, S. Escoffier, M. Farina, R. Farinelli, F. Faustini, S. Ferriol, S. Fotopoulou, M. Frailis, E. Franceschi, M. Fumana, S. Galeotta, K. George, B. Gillis, J. Gracia-Carpio, A. Grazian, F. Grupp, S. V. H. Haugan, J. Hoar, H. Hoekstra, W. Holmes, I. M. Hook, F. Hormuth, A. Hornstrup, K. Jahnke, M. Jhabvala, E. Keihänen, S. Kermiche, A. Kiessling, B. Kubik, M. Kümmel, M. Kunz, H. Kurki-Suonio, O. Lahav, R. Laureijs, A. M. C. Le Brun, D. Le Mignant, S. Ligori, P. B. Lilje, V. Lindholm, I. Lloro, D. Maino, E. Maiorano, O. Mansutti, O. Marggraf, M. Martinelli, N. Martinet, F. Marulli, R. Massey, S. Maurogordato, E. Medinaceli, S. Mei, Y. Mellier, M. Meneghetti, E. Merlin, G. Meylan, A. Mora, M. Moresco, L. Moscardini, R. Nakajima, C. Neissner, S. -M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. J. Percival, V. Pettorino, S. Pires, G. Polenta, M. Poncet, L. A. Popa, L. Pozzetti, F. Raison, R. Rebolo, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, M. Roncarelli, R. Saglia, Z. Sakr, A. G. Sánchez, D. Sapone, B. Sartoris, J. A. Schewtschenko, P. Schneider, T. Schrabback, G. Seidel, M. Seiffert, S. Serrano, C. Sirignano, G. Sirri, L. Stanco, J. Steinwagner, P. Tallada-Crespí, A. N. Taylor, I. Tereno, S. Toft, R. Toledo-Moreo, F. Torradeflot, A. Tsyganov, I. Tutusaus, E. A. Valentijn, L. Valenziano, J. Valiviita, T. Vassallo, G. Verdoes Kleijn, A. Veropalumbo, Y. Wang, J. Weller, G. Zamorani, F. M. Zerbi, E. Zucca, C. Burigana, J. Martín-Fleitas, V. Scottez

AI总结:

研究perseus星系团中矮星系与球状星团的关系,发现低表面亮度矮星系的球状星团分布与高表面亮度矮星系不同,udg的球状星团特征也与非udg不同。

摘要:

我们对perseus星系团中矮星系的球状星团(gc)进行了分析,以探讨矮星系性质与其gc之间的关系。我们的重点是围绕矮星系的gc数量(n_gc)和gc半数半径(r_gc),以及它们与宿主星系恒星质量(m_*)、中心表面亮度(μ_0)和有效半径(r_e)的关系。有趣的是,我们在给定恒星质量的情况下发现,r_gc几乎不依赖于宿主星系的μ_0和r_e,而r_gc/r_e则依赖于μ_0和r_e;低表面亮度和分散的矮星系显示r_gc/r_e≈1,而高表面亮度和紧凑的矮星系显示r_gc/r_e≈1.5-2。这意味着对于恒星质量相似的矮星系,其gc有相似的中位数范围;然而,它们的分布与宿主的场星不同。此外,低表面亮度和分散的矮星系在任何给定的恒星质量下平均具有比高表面亮度和紧凑的矮星系更高的n_gc。我们还发现udg(超分散星系)和非udg有相似的r_gc,而udg的r_gc/r_e通常小于1,并且比非udg的n_gc高3-4倍。检查有核和无核的矮星系,我们发现对于m_*>10^8m_⊙,有核的矮星系似乎有更小的r_gc和r_gc/r_e,它们的n_gc没有显著差异,除了在m_*<10^8m_⊙时,有核的矮星系倾向于有更高的n_gc。最后,我们探讨了矮星系的恒星到暗物质质量比(shmr),并得出结论:perseus星系团的矮星系遵循预期的shmr,在z=0时向下扩展到m_=10^6m_⊙。

英文摘要:

We present an analysis of globular clusters (GCs) of dwarf galaxies in the Perseus galaxy cluster to explore the relationship between dwarf galaxy properties and their GCs. Our focus is on GC numbers ($N_{\rm GC}$) and GC half-number radii ($R_{\rm GC}$) around dwarf galaxies, and their relations with host galaxy stellar masses ($M_*$), central surface brightnesses ($μ_0$), and effective radii ($R_{\rm e}$). Interestingly, we find that at a given stellar mass, $R_{\rm GC}$ is almost independent of the host galaxy $μ_0$ and $R_{\rm e}$, while $R_{\rm GC}/R_{\rm e}$ depends on $μ_0$ and $R_{\rm e}$; lower surface brightness and diffuse dwarf galaxies show $R_{\rm GC}/R_{\rm e}\approx 1$ while higher surface brightness and compact dwarf galaxies show $R_{\rm GC}/R_{\rm e}\approx 1.5$-$2$. This means that for dwarf galaxies of similar stellar mass, the GCs have a similar median extent; however, their distribution is different from the field stars of their host. Additionally, low surface brightness and diffuse dwarf galaxies on average have a higher $N_{\rm GC}$ than high surface brightness and compact dwarf galaxies at any given stellar mass. We also find that UDGs (ultra-diffuse galaxies) and non-UDGs have similar $R_{\rm GC}$, while UDGs have smaller $R_{\rm GC}/R_{\rm e}$ (typically less than 1) and 3-4 times higher $N_{\rm GC}$ than non-UDGs. Examining nucleated and not-nucleated dwarf galaxies, we find that for $M_*>10^8M_{\odot}$, nucleated dwarf galaxies seem to have smaller $R_{\rm GC}$ and $R_{\rm GC}/R_{\rm e}$, with no significant differences between their $N_{\rm GC}$, except at $M_*<10^8M_{\odot}$ where the nucleated dwarf galaxies tend to have a higher $N_{\rm GC}$. Lastly, we explore the stellar-to-halo mass ratio (SHMR) of dwarf galaxies and conclude that the Perseus cluster dwarf galaxies follow the expected SHMR at $z=0$ extrapolated down to $M_*=10^6M_{\odot}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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