The EDGE-CALIFA survey: exploring the star formation law through variable selection

被引：32

作者：

Dey, Biprateep ^{[1
,2
,11
]}

Rosolowsky, Erik ^{[2
]}

Cao, Yixian ^{[3
]}

Bolatto, Alberto ^{[4
]}

Sanchez, Sebastian F. ^{[5
]}

Utomo, Dyas ^{[6
]}

Colombo, Dario ^{[7
]}

Kalinova, Veselina ^{[7
]}

Wong, Tony ^{[3
]}

Blitz, Leo ^{[8
]}

Vogel, Stuart ^{[4
]}

Loeppky, Jason ^{[9
]}

Garcia-Benito, Ruben ^{[10
]}

机构：

[1] HBNI, Natl Inst Sci Educ & Res, Sch Phys Sci, Jatni 752050, India

[2] Univ Alberta, Dept Phys, 4-183 CCIS, Edmonton, AB T6G 2E1, Canada

[3] Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA

[4] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[5] Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico

[6] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 USA

[7] Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany

[8] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA

[9] Univ British Columbia, Dept Stat, Okanagan Campus,3333 Univ Way, Kelowna, BC V1V 1V7, Canada

[10] Inst Astrofis Andalucia, E-18008 Granada, Spain

[11] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 488卷 / 02期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

stars: formation; galaxies: evolution; galaxies: star formation; SDSS-IV MANGA; EARLY-TYPE GALAXIES; IRAM LEGACY SURVEY; NEARBY GALAXIES; MOLECULAR GAS; MASSIVE GALAXIES; GALACTIC DISKS; COLD GASS; STARBURSTS; PIPELINE;

D O I：

10.1093/mnras/stz1777

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a multilinear analysis to determine the significant predictors of star formation in galaxies using the combined EDGE-CALIFA sample of galaxies. We analyse 1845 kpc-scale lines of sight across 39 galaxies with molecular line emission measurements from EDGE combined with optical IFU data drawn from CALIFA. We use the Least Absolute Shrinkage and Selection Operator (LASSO) to identify significant factors in predicting star formation rates. We find that the local star formation rate surface density is increased by higher molecular gas surface densities and stellar surface densities. In contrast, we see lower star formation rates in systems with older stellar populations, higher gas- and stellar-phase metallicities and larger galaxy masses. We also find a significant increase in star formation rate with galactocentric radius normalized by the disc scale length, which suggests additional parameters regulating star formation rate not explored in this study.

引用

页码：1926 / 1940

页数：15

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