An Fangxia1; Zheng Xianzhong2; Meng Yanzhi2; Chen Yang3; Wen Zhangzheng2; Lu Guoliang1
Source Publicationsciencechinaphysicsmechanicsastronomy
AbstractA study of S Ⅲλλ9096, 9532 emitters at z=1.34 and 1.23 is presented using our deep narrow-band H_2S 1 (centered at 2.13 μm) imaging survey of the Extended Chandra Deep Field South (ECDFS).We combine our data with multi-wavelength data of ECDFS to build up spectral energy distributions (SEDs) from the U to the K_s-band for emitter candidates selected with strong excess in H_2S 1-K_s and derive photometric redshifts, line luminosities, stellar masses and extinction. A sample of 14 S Ⅲ emitters are identified with H_2S 1 < 22.8 and Ks < 24.8 (AB) over 381 arcmin~2 area, having S Ⅲ line luminosity L_(SⅢ)=~10~(41.5-42.6) erg s~(-1). None of the S Ⅲ emitters is found to have X-ray counterpart in the deepest Chandra 4Ms observation, suggesting that they are unlikely powered by AGNs. The HST/ACS F606W and HST/WFC3 F160W images show their rest-frame UV and optical morphologies. About half of the S Ⅲ emitters are mergers and at least one third are disk-type galaxies. Nearly all S Ⅲ emitters exhibit a prominent Balmer break in their SEDs, indicating the presence of a significant post-starburst component. Taken together, our results imply that both shock heating in post-starburst and photoionization caused by young massive stars are likely to excite strong S Ⅲ emission lines. We conclude that the S Ⅲ emitters in our sample are dominated by star-forming galaxies (SFGs) with stellar mass 8.7 < log(M/M_⊙) < 9.9.
Document Type期刊论文
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GB/T 7714
An Fangxia,Zheng Xianzhong,Meng Yanzhi,et al. thenatureofs90969532emittersatz134and123[J]. sciencechinaphysicsmechanicsastronomy,2013,56(11):2226.
APA An Fangxia,Zheng Xianzhong,Meng Yanzhi,Chen Yang,Wen Zhangzheng,&Lu Guoliang.(2013).thenatureofs90969532emittersatz134and123.sciencechinaphysicsmechanicsastronomy,56(11),2226.
MLA An Fangxia,et al."thenatureofs90969532emittersatz134and123".sciencechinaphysicsmechanicsastronomy 56.11(2013):2226.
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