The ALMaQUEST Survey. VII. Star Formation Scaling Relations of Green Valley Galaxies

doi:10.3847/1538-4357/ac4ccc

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/122460

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題名:	The ALMaQUEST Survey. VII. Star Formation Scaling Relations of Green Valley Galaxies
作者:	Lihwai Lin;Sara L. Ellison;Hsi-An Pan;Mallory D. Thorp;Po-Chieh Yu;Francesco Belfiore;Bau-Ching Hsieh;Roberto Maiolino;S. Ramya;Sebastián F. Sánchez;Yung-Chau Su
日期:	2022-02-23
上傳時間:	2022-03-10 12:10:55 (UTC+8)
摘要:	We utilize the ALMA-MaNGA QUEnch and STar formation (ALMaQUEST) survey to investigate the kpc-scale scaling relations, presented as the resolved star-forming MS (rSFMS: ΣSFR versus Σ), the resolved Schmidt–Kennicutt relation (rSK: ΣSFR versus ${{\rm{\Sigma }}}_{{{\rm{H}}}_{2}}$), and the resolved molecular gas MS (rMGMS: ${{\rm{\Sigma }}}_{{{\rm{H}}}_{2}}$ versus Σ), for 11,478 star-forming and 1414 retired spaxels (oversampled by a factor of ∼20) located in 22 GV and 12 MS galaxies. For a given galaxy type (MS or GV), the retired spaxels are found to be offset from the sequences formed by the star-forming spaxels on the rSFMS, rSK, and rMGMS planes, toward lower absolute values of sSFR, SFE, and ${f}_{{{\rm{H}}}_{2}}$ by ∼1.1, 0.6, and 0.5 dex. The scaling relations for GV galaxies are found to be distinct from that of the MS galaxies, even if the analyses are restricted to the star-forming spaxels only. It is found that, for star-forming spaxels, sSFR, SFE, and ${f}_{{{\rm{H}}}_{2}}$ in GV galaxies are reduced by ∼0.36, 0.14, and 0.21 dex, respectively, compared to those in MS galaxies. Therefore, the suppressed sSFR/SFE/fgas in GV galaxies is associated with not only an increased proportion of retired regions in GV galaxies but also a depletion of these quantities in star-forming regions. Finally, the reduction of SFE and ${f}_{{{\rm{H}}}_{2}}$ in GV galaxies relative to MS galaxies is seen in both bulge and disk regions (albeit with larger uncertainties), suggesting that, statistically, quenching in the GV population may persist from the inner to the outer regions.
關聯:	The Astrophysical Journal 926(2), 175
DOI:	10.3847/1538-4357/ac4ccc
顯示於類別:	[物理學系暨研究所] 期刊論文

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