Detection of Water Maser Flare in the Seyfert/LINER, NGC 6240

Publications of the Astronomical Society of Japan

Yamauchi, Aya¹  Sato, Naoko²  Nakai, Naomasa³ 

[1] Nobeyama Radio Observatory,* Minamimaki, Minamisaku, Nagano 384-1305Department of Physics, School of Science, Kyushu University, Ropponmatsu, Fukuoka 810-8560 , ,;Nobeyama Radio Observatory,* Minamimaki, Minamisaku, Nagano 384-1305Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810;Nobeyama Radio Observatory,* Minamimaki, Minamisaku, Nagano 384-1305

关键词: "galaxies: active";    "galaxies: individual (NGC 6240)";    "galaxies: nuclei";    masers;   

DOI  :  10.1093/pasj/54.2.L27

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Wereportonaflare-upofwater-vapormaseremissioninaprototypicalultraluminousFIRgalaxywithanAGN,NGC6240.Thefluxdensityofthedetectedmaserlinewas$$approx0.1,mathrm{Jy}$$with$$mathit{FWHM}approx5,mathrm{km},mathrm{s}^{-1}$$,indicatinganapparentisotropicluminosityof$$approx100,{L}_{odot}$$atadistanceof100Mpc,whichistypicalforwatermegamasers.Themaserlinewasredshiftedby$$approx200,mathrm{km},mathrm{s}^{-1}$$relativetothesystemicvelocityofthegalaxy,whilenosystemic-velocityfeaturewasdetected.Thepreviouspossibledetectionorobservedupperlimitswereatalevellowerthanthefluxdensityinthepresentpaper,indicatingthatthewatermaserinNGC6240flaredupbymorethanafactorof5in2001.

【 授权许可】

Unknown