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arXiv 2209.01965astro-ph.HEastro-ph.GA
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宇宙中恒星形成率最高的AGN中奇特的黑洞吸积率

Peculiar black hole accretion rates in AGN with highest star formation rates in the universe

David Garofalo, Ektoras Pouliasis

摘要:

Pouliasis et al(2022 b)研究了恒星形成率、黑洞吸积率和红移大于3.5的活动星系的恒星质量,发现恒星形成率在高恒星质量时趋于平稳,他们认为这是活动星系核反馈的证据。他们的数据显示,当活动星系核接近恒星形成率-恒星质量平面曲线的平坦化时,吸积率开始下降。我们描述的活动星系核反馈的性质负责这方面的强大FRII喷气机提高恒星形成率,但最终也引发了吸积从近爱丁顿率平流为主的转变。这些系统正处于一个戏剧性的转变的风口浪尖上,活动星系从强烈的增强到对恒星形成的巨大抑制,在这种方式下,与高红移的射电活动星系核和无喷流的活动星系核相比,低红移的射电活动星系核的斜率更陡。因此,我们认为,Pouliasis等人的数据构成了Singh等人(2021)预测的高红移天体,这些天体与Comerford等人(2020)所示的射电活动星系核的低红移行为有关。

英文摘要:

Pouliasis et al (2022b) explored star formation rates, black hole accretion rates, and stellar mass of active galaxies at redshift above 3.5, uncovering a leveling off of the star formation rate at high stellar mass, which they consider to be evidence of AGN feedback. Their data shows that as AGN approach the flattening of the curve in the star formation rate - stellar mass plane, the accretion rates begin to drop. We describe the nature of the AGN feedback responsible for this in terms of powerful FRII jets enhancing star formation rates but eventually also triggering a shift in accretion from near-Eddington rates to advection dominated. These systems are on the cusp of a dramatic transition where the active galaxy goes from strong enhancement to large suppression of star formation in a way that produces the steeper slope for radio AGN at low redshift compared to radio AGN at higher redshift and to jetless AGN. We argue, therefore, that the data of Pouliasis et al constitute the high redshift objects predicted by Singh et al (2021) that connect to the low redshift behavior of radio AGN shown in Comerford et al (2020).

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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