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SDSS-IV MaNGA: The link between bars and the early cessation of star formation in spiral galaxies
Monthly Notices of the Royal Astronomical Society ( IF 4.8 ) Pub Date : 2020-09-21 , DOI: 10.1093/mnras/staa2866
Amelia Fraser-McKelvie 1, 2 , Michael Merrifield 1 , Alfonso Aragón-Salamanca 1 , Thomas Peterken 1 , Katarina Kraljic 3 , Karen Masters 4 , David Stark 4 , Francesca Fragkoudi 5 , Rebecca Smethurst 6 , Nicholas Fraser Boardman 7 , Niv Drory 8 , Richard R Lane 9
Affiliation  

Bars are common in low-redshift disk galaxies, and hence quantifying their influence on their host is of importance to the field of galaxy evolution. We determine the stellar populations and star formation histories of 245 barred galaxies from the MaNGA galaxy survey, and compare them to a mass- and morphology-matched comparison sample of unbarred galaxies. At fixed stellar mass and morphology, barred galaxies are optically redder than their unbarred counterparts. From stellar population analysis using the full spectral fitting code Starlight, we attribute this difference to both older and more metal-rich stellar populations. Dust attenuation however, is lower in the barred sample. The star formation histories of barred galaxies peak earlier than their non-barred counterparts, and the galaxies build up their mass at earlier times. We can detect no significant differences in the local environment of barred and un-barred galaxies in this sample, but find that the HI gas mass fraction is significantly lower in high-mass ($\rm{M}_{\star} > 10^{10}~\rm{M}_{\odot}$) barred galaxies than their non-barred counterparts. We speculate on the mechanisms that have allowed barred galaxies to be older, more metal-rich and more gas-poor today, including the efficient redistribution of galactic fountain byproducts, and a runaway bar formation scenario in gas-poor disks. While it is not possible to fully determine the effect of the bar on galaxy quenching, we conclude that the presence of a bar and the early cessation of star formation within a galaxy are intimately linked.

中文翻译:

SDSS-IV MaNGA:条带与螺旋星系中恒星形成的早期停止之间的联系

棒在低红移盘星系中很常见,因此量化它们对宿主的影响对星系演化领域很重要。我们确定了来自 MaNGA 星系调查的 245 个棒状星系的恒星种群和恒星形成历史,并将它们与质量和形态匹配的非棒状星系比较样本进行了比较。在固定的恒星质量和形态下,棒状星系比它们的未棒状星系在光学上更红。从使用全光谱拟合代码 Starlight 的恒星种群分析来看,我们将这种差异归因于更古老和更富含金属的恒星种群。然而,禁止样品中的灰尘衰减较低。棒状星系的恒星形成历史比非棒状星系的恒星形成历史更早达到峰值,并且星系在更早的时间积累它们的质量。我们在这个样本中检测不到棒星系和非棒星系局部环境的显着差异,但发现高质量的 HI 气体质量分数明显较低($\rm{M}_{\star} > 10 ^{10}~\rm{M}_{\odot}$) 禁止的星系比未禁止的星系要多。我们推测了今天导致棒星系更老、更富金属和更贫气的机制,包括银河喷泉副产品的有效再分配,以及在贫气盘中失控的棒形成场景。虽然不可能完全确定棒对星系淬灭的影响,但我们得出结论,棒的存在与星系内恒星形成的早期停止密切相关。但发现高质量 ($\rm{M}_{\star} > 10^{10}~\rm{M}_{\odot}$) 禁止星系中的 HI 气体质量分数明显低于它们的非禁止同行。我们推测了今天导致棒星系更老、更富金属和更贫气的机制,包括银河喷泉副产品的有效重新分布,以及在贫气盘中失控的棒形成场景。虽然不可能完全确定棒对星系淬灭的影响,但我们得出结论,棒的存在与星系内恒星形成的早期停止密切相关。但发现高质量 ($\rm{M}_{\star} > 10^{10}~\rm{M}_{\odot}$) 禁止星系中的 HI 气体质量分数明显低于它们的非禁止同行。我们推测了今天导致棒星系更老、更富金属和更贫气的机制,包括银河喷泉副产品的有效重新分布,以及在贫气盘中失控的棒形成场景。虽然不可能完全确定棒对星系淬灭的影响,但我们得出结论,棒的存在与星系内恒星形成的早期停止密切相关。今天更富金属和更贫气,包括银河喷泉副产品的有效再分配,以及贫气盘中失控的酒吧形成场景。虽然不可能完全确定棒对星系淬灭的影响,但我们得出结论,棒的存在与星系内恒星形成的早期停止密切相关。今天更富金属和更贫气,包括银河喷泉副产品的有效再分配,以及贫气盘中失控的酒吧形成场景。虽然不可能完全确定棒对星系淬灭的影响,但我们得出结论,棒的存在与星系内恒星形成的早期停止密切相关。
更新日期:2020-09-21
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