The distances of 61 PGCCs in the second galactic quadrant

The distances of 61 PGCCs in the second galactic quadrant
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银河系第二象限61个PGCC的距离

DOI:
10.1093/mnras/staa3478
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发表时间:
2020-11
影响因子:
4.8
通讯作者:
Liu X-W
Liu X-W
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Guo H-L;Chen B-Q;Li G-X;Huang Y.;Yang Y.;Li X-Y;Sun W-X;Liu X-W

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确定普朗克星系冷团(PGCC)的距离对于测量其物理参数和研究其在银河系中的分布至关重要。基于两个大的星表与强大的距离和红化的估计,从文献中,我们估计准确的距离61 PGCC在第二银河象限。为此,我们选择了沿着视线与样本团块的核心重叠的恒星,并用一个简单的红化模型拟合红化轮廓。这些PGCC的合成距离的典型不确定性小于8%,新的估计值与运动学值有很大差异,众所周知,运动学值误差很大。利用新的距离,我们更新了PGCC核心的物理性质,包括半径,质量和维里参数。
Determining the distances to the Planck Galactic cold clumps (PGCCs) is crucial for the measurement of their physical parameters and the study of their Galactic distribution. Based on two large catalogues of stars with robust distances and reddening estimates from the literature, we have estimated accurate distances to 61 PGCCs in the second Galactic quadrant. For this purpose, we have selected stars along the sightlines overlapping with the cores of the sample clumps and fitted the reddening profiles with a simple reddening model. The typical uncertainties of the resultant distances of these PGCCs are less than 8 per cent. The new estimates differ significantly from the kinematic values, well known to suffer from large errors. With the new distances, we have updated the physical properties including the radii, masses and virial parameters of the cores of the PGCCs.
DOI: 10.1017/cbo9780511536618.001
发表时间: 2003
期刊: --
影响因子: --
作者:
J. Wall;C. Jenkins
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