恒星形成星系中紧密的 N/O 电位关系

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2024-07-25 DOI:10.1093/mnrasl/slae071

N. Boardman, Vivienne Wild, N. V. Asari

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引用次数: 0

摘要

我们报告说，对于MaNGA巡天中的恒星形成星系，气态N/O与M*/Re（引力势能的代表）之间的趋势要比以前报告的气态金属性与M*/Re之间的趋势紧密得多。我们认为这一结果是由于更深的势阱对金属外流具有更大的阻力，同时也与更早的恒星形成历史有关，再加上 N/O 相对不受贫金属流入的影响。因此，与以前考虑的关系相比，电位-N/O关系似乎更能抵抗短时标重子过程，也更能反映星系的化学演化状态。

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A tight N/O–potential relation in star-forming galaxies

We report a significantly tighter trend between gaseous N/O and M*/Re (a proxy for gravitational potential) than has previously been reported between gaseous metallicity and M*/Re, for star-forming galaxies in the MaNGA survey. We argue this result to be a consequence of deeper potential wells conferring greater resistance to metal outflows while also being associated with earlier star-formation histories, combined with N/O being comparatively unaffected by metal-poor inflows. The potential–N/O relation thus appears to be both more resistant to short-timescale baryonic processes and also more reflective of a galaxy’s chemical evolution state, when compared to previously-considered relations.

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.