Searching for the 380 GHz H2O emission from the high-z lensed quasi-stellar object MG J0414+0534

PASJ: Publications of the Astronomical Society of Japan

Braatz, James A¹  Suyu, Sherry H²  Kuo, Cheng-Yu³  Impellizzeri, Violette⁴ 

[1] Joint ALMA Office, Alonso de Córdova 3107, Vitacura, Santiago, Chile;Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching, Germany;Physics Department, National Sun Yat-Sen University, No. 70, Lien-Hai Rd, Kaosiung City 80424, Taiwan, R.O.C;Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany

关键词: (galaxies:) quasars: emission lines;    galaxies: ISM;    masers;    (galaxies:) quasars: supermassive black holes;    galaxies: active;   

DOI  :  10.1093/pasj/psz032

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

We report the results of our search for the 380 GHz H2O line emissions from the quadruply lensed quasi-stellar object (QSO) MG J0104+0534 at z = 2.639 with the Atacama Large Millimeter/submillimeter Array. Our observation shows a tentative detection of the 380 GHz line from the lensed QSO, and the line spectrum shows a broad spectral distribution that has a velocity width of ∼290 km s−1 and a peak flux of ∼0.8 mJy. The integrated intensity map of the H2O line shows lensed emissions at the A1 and A2 component of the QSO, with the A2 component slightly resolved. The integrated line flux ratio between the A1 and A2 components shows an unexpected difference from the continuum flux ratio. Based on our gravitational lens modeling, assuming our tentative detection is real, this flux ratio anomaly would suggest that the 380 GHz line emissions come from two or three spatially displaced locations in the QSO, with the dominant one located at the position of the continuum emission from the QSO, and the other one(s) displaced from the continuum by ∼1.5 kpc on the source plane.

【 授权许可】

CC BY