HERSCHEL OBSERVATIONS OF MAJOR MERGER PAIRS AT z=0: DUST MASS AND STAR FORMATION

被引：20

作者：

Cao, Chen ^{[1
,2
,3
]}

Xu, Cong Kevin ^{[3
]}

Domingue, Donovan ^{[4
]}

Buat, Veronique ^{[5
,6
]}

Cheng, Yi-Wen ^{[7
]}

Gao, Yu ^{[8
]}

Huang, Jiasheng ^{[9
]}

Jarrett, Thomas H. ^{[10
]}

Lisenfeld, Ute ^{[11
]}

Lu, Nanyao ^{[3
]}

Mazzarella, Joe ^{[3
]}

Sun, Wei-Hsin ^{[12
,13
]}

Wu, Hong ^{[14
]}

Yun, Min S. ^{[15
]}

Ronca, Joseph ^{[4
]}

Jacques, Allison ^{[4
]}

机构：

[1] Shandong Univ, Sch Space Sci & Phys, Weihai 264209, Shandong, Peoples R China

[2] Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Shandong, Peoples R China

[3] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA

[4] Georgia Coll & State Univ, CBX 82, Milledgeville, GA 31061 USA

[5] Univ Aix Marseille, LAM, 38 Rue F Joliot Curie, F-13388 Marseille 13, France

[6] CNRS, UMR7326, 38 Rue F Joliot Curie, F-13388 Marseille 13, France

[7] Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan

[8] Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Peoples R China

[9] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[10] Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa

[11] Univ Granada, Dept Fis Teor & Cosmos, E-18071 Granada, Spain

[12] Natl Taiwan Univ, Inst Astrophys, Taipei, Taiwan

[13] Natl Museum Nat Sci, Taipei, Taiwan

[14] Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China

[15] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2016年 / 222卷 / 02期

关键词：

galaxies: evolution; galaxies: general; galaxies: interactions; galaxies: starburst; DIGITAL SKY SURVEY; ULTRALUMINOUS INFRARED GALAXIES; SPECTRAL ENERGY-DISTRIBUTIONS; ACTIVE GALACTIC NUCLEI; INTERACTING GALAXIES; FORMATION RATES; METALLICITY RELATION; FORMING GALAXIES; COSMIC EVOLUTION; BINARY GALAXIES;

D O I：

10.3847/0067-0049/222/2/16

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present Herschel PACS and SPIRE far-infrared (FIR) and submillimeter imaging observations for a large K-band selected sample of 88 close major-merger pairs of galaxies (H-KPAIRs) in 6 photometric bands (70, 100, 160, 250, 350, and 500 mu m). Among 132 spiral galaxies in the 44 spiral-spiral (S+S) pairs and 44 spiral-elliptical (S+ E) pairs, 113 are detected in at least 1 Herschel band. The star formation rate (SFR) and dust mass (M-dust) are derived from the IR SED fitting. The mass of total gas (M-gas) is estimated by assuming a constant dust-to-gas mass ratio of 0.01. Star-forming spiral galaxies (SFGs) in S+ S pairs show significant enhancements in both specific star formation rate (sSFR) and star formation efficiency (SFE), while having nearly the same gas mass compared to control galaxies. On the other hand, for SFGs in S+ E pairs, there is no significant sSFR enhancement and the mean SFE enhancement is significantly lower than that of SFGs in S+ S pairs. This suggests an important role for the disk-disk collision in the interaction-induced star formation. The M-gas of SFGs in S+ E pairs is marginally lower than that of their counterparts in both S+ S pairs and the control sample. Paired galaxies with and without interaction signs do not differ significantly in their mean sSFR and SFE. As found in previous works, this much larger sample confirms that the primary and secondary spirals in S+S pairs follow a Holmberg effect correlation on sSFR.

引用

页数：22

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