寻找河外氢化锂
The Search for Extragalactic Lithium Hydride
摘要：
我们已经进行了毫米波天文学研究组合阵列（CARMA）观测LiH，在吸收，对三个类星体。这些类星体B 0218 +357、PKS 1830 -211和PKS 0201 +113的红移为z = 0.685 - 3.387 $, and shift the LiH J=1-0 transition to the 1 mm and 3mm wavelength bands, where atmospheric absorption is sharply reduced from that predominating near the rest frequency of 443 GHz. We report a 3$ σ$，在B 0218 +357方向上探测到LiH，柱密度为1.4 × 10 ^{12} cm^{-2}，^6 Li/^7 Li比值的上限小于0.16。没有检测到LiH对任何其他来源。
英文摘要：
We have conducted Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations of LiH, in absorption, toward three quasars. These quasars, B0218+357, PKS1830-211, and PKS0201+113, have redshifts of z = 0.685 - 3.387$, and shift the LiH J=1-0 transition to the 1 mm and 3mm wavelength bands, where atmospheric absorption is sharply reduced from that predominating near the rest frequency of 443 GHz. We report a 3$σ$ detection of LiH toward B0218+357 with a column density of 1.4x10^{12} cm^{-2} and place an upper limit on the ^6Li/^7Li ratio of <0.16. LiH was not detected toward any other source.
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