期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 414, 期 1, 页码 L95-L99出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2011.01064.x
关键词
ISM: evolution; galaxies: evolution; galaxies: high-redshift; galaxies: starburst; infrared: galaxies; submillimetre: galaxies
资金
- STFC
- STFC [ST/H005234/1, ST/I001573/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H005234/1, ST/I001573/1] Funding Source: researchfish
We investigate whether strong molecular and atomic emission lines at far-infrared wavelengths can influence the identification and derived properties of galaxies selected from broad-band, far-infrared or submillimetre observations. Several of these lines, for example, [C II] 158 mu m, have been found to be very bright in some galaxies, with fluxes of greater than or similar to 0.1-1 per cent of the total far-infrared luminosity, and may be even brighter in certain populations at high redshifts. At redshifts where these lines fall in instrument passbands, they can significantly increase the broad-band flux measurements. We estimate that the contributions from line emission could boost the apparent broad-band flux by greater than or similar to 20-40 per cent in the Herschel and SCUBA-2 bands. Combined with the steep source counts in the submillimetre and far-infrared bands, line contamination has potentially significant consequences for the properties of sources detected in flux-limited continuum surveys, biasing the derived redshift distributions and bolometric luminosities. Indeed, it is possible that some z > 4 sources found in 850-mu m surveys are being identified in part due to the line contamination from strong [C II] emission. These biases may be even stronger for less-luminous and lower metallicity populations at high redshifts, which are observable with the ALMA and which may have even stronger line-to-continuum ratios.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据