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arXiv 1209.4170astro-ph.GA
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AKARI远红外全天巡天图

AKARI Far-Infrared All-Sky Survey Maps

Yasuo Doi, Shinya Komugi, Mitsunobu Kawada, Satoshi Takita, Ko Arimatsu, Norio Ikeda, Daisuke Kato, Yoshimi Kitamura, Takao Nakagawa, Takafumi Ootsubo, Takahiro… 展开作者

Yasuo Doi, Shinya Komugi, Mitsunobu Kawada, Satoshi Takita, Ko Arimatsu, Norio Ikeda, Daisuke Kato, Yoshimi Kitamura, Takao Nakagawa, Takafumi Ootsubo, Takahiro Morishima, Makoto Hattori, Masahiro Tanaka, Glenn J. White, Mireya Etxaluze, Hiroshi Shibai

摘要:

远红外观测为研究和表征星际介质(ISM)中尘埃物质的性质提供了关键数据,因为其大部分能量在~100和200 μ m之间发射。我们提出了第一个全天空图像从一个敏感的全天空调查使用日本AKARI卫星,在波长范围50 - 180微米。在四个测光波段中覆盖>99%的天空,四个滤光片分别位于65 um,90 um,140 um和160 um波长,空间分辨率从1到2 arcmin,检测限<10 MJy sr-1,绝对和相对测光精度<20%。银河尘埃连续辐射的全天图像使天文学家能够绘制弥漫的ISM卷云的大尺度分布图,研究其热尘埃温度,发射率和柱密度,并测量银河辐射场和嵌入物体与周围ISM的相互作用。除了点源人口的恒星,原恒星,恒星形成区,和星系,银河系高纬度的天空被覆盖着一个弥漫的尘埃排放,跟踪高纬度恒星形成的潜在网站的被动网络。我们表明,尘埃粒子的温度在热平衡与环境星际辐射场可以估计使用90微米,140微米,160微米的数据。FIR AKARI的全天空地图提供了一个丰富的新数据集,天文学家可以在其中调查整个银河系以及其他地方的星际物质分布。

英文摘要:

Far-infrared observations provide crucial data for the investigation and characterisation of the properties of dusty material in the Interstellar Medium (ISM), since most of its energy is emitted between ~100 and 200 um. We present the first all-sky image from a sensitive all-sky survey using the Japanese AKARI satellite, in the wavelength range 50 -- 180 um. Covering >99% of the sky in four photometric bands with four filters centred at 65 um, 90 um, 140 um, and 160 um wavelengths, this achieved spatial resolutions from 1 to 2 arcmin and a detection limit of <10 MJy sr-1, with absolute and relative photometric accuracies of <20%. All-sky images of the Galactic dust continuum emission enable astronomers to map the large-scale distribution of the diffuse ISM cirrus, to study its thermal dust temperature, emissivity and column density, and to measure the interaction of the Galactic radiation field and embedded objects with the surrounding ISM. In addition to the point source population of stars, protostars, star-forming regions, and galaxies, the high Galactic latitude sky is shown to be covered with a diffuse filamentary-web of dusty emission that traces the potential sites of high latitude star formation. We show that the temperature of dust particles in thermal equilibrium with the ambient interstellar radiation field can be estimated by using 90 um, 140 um, and 160 um data. The FIR AKARI full-sky maps provide a rich new data set within which astronomers can investigate the distribution of interstellar matter throughout our Galaxy, and beyond.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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