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arXiv 2401.07320astro-ph.GA
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SDSS-IV MaNGA巡天中的大质量红色旋涡星系

Massive Red Spiral Galaxies in SDSS-IV MaNGA Survey

Jiantong Cui, Qiusheng Gu, Yong Shi

AI总结:

本文利用MaNGA巡天数据研究大质量红色旋涡星系,发现其结构与恒星形成状态更接近透镜状星系,揭示二者之间可能存在演化关系。

摘要:

大质量红色旋涡星系(MRSGs)被认为是透镜状星系(S0s)的可能前身。我们利用$g-r$颜色与恒星质量图,从MaNGA DR17中选取了一个大样本MRSGs($M_*>10^{10.5}\rm M_{\odot}$),同时选取了蓝色旋涡星系和S0s作为对照样本。主要结果如下:(1)通过比较Sérsic指数、聚集度参数、不对称参数分布、尺寸-质量关系以及$Σ_1$(中心1 kpc内的恒星质量面密度)-质量关系,我们发现MRSGs与S0s相似,并且比蓝色旋涡星系具有更致密和更对称的结构。MRSGs在Dn4000、金属丰度、Mgb/$\rm \left \langle Fe \right \rangle$和$V/σ$径向轮廓方面也与S0s相似。(2)利用MaNGA二维光谱数据,我们将空间区域划分为内部(R < 0.8$R_{\rm e}$)和外部(0.8$R_{\rm e}$ < R < 1.5$R_{\rm e}$)区域,并在MRSGs的外部区域探测到残余恒星形成。(3)当我们选取NUV$-r$ > 5的MRSGs子样本时,发现它们在内部和外部区域都完全停止了恒星形成。与光学选择的MRSGs相比,NUV$-r$选择的MRSGs似乎更集中,并具有更大质量的暗物质晕。S0s与MRSGs之间的相似性表明MRSGs与S0s之间可能存在演化趋势。

英文摘要:

Massive red spiral galaxies (MRSGs) are supposed to be the possible progenitors of lenticular galaxies (S0s). We select a large sample of MRSGs ($M_*>10^{10.5}\rm M_{\odot}$) from MaNGA DR17 using the $g-r$ color vs. stellar mass diagram, along with control samples of blue spirals and S0s. Our main results are as follows: (1) After comparing the S$\rm \acute{e}$rsic index, concentration parameter, asymmetry parameter distribution, size-mass relation and $Σ_1$ (stellar mass surface density within the central 1 kpc)-mass relation, we find MRSGs are similar to S0s and have more compact and symmetric structures than blue spirals. MRSGs also resemble S0s in Dn4000, metallicity, Mgb/$\rm \left \langle Fe \right \rangle$ and $V/σ$ radial profile. (2) By using MaNGA 2D spectra data, we separate the spatial regions into inner (R < 0.8$R_{\rm e}$) and outer (0.8$R_{\rm e}$ < R < 1.5$R_{\rm e}$) regions, and detect residual star formation in the outer regions of MRSGs. (3) When we select a sub-sample of MRSGs with NUV$-r$ > 5, we find that they are completely star-formation quenched in both inner and outer regions. Compared to optically selected MRSGs, NUV$-r$ selected MRSGs appear to be more concentrated and have more massive dark matter halos. The similarities between S0s and MRSGs suggest the possible evolutionary trend between MRSGs and S0s.

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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