识别HESS J1858 +020的对应物
Identifying the counterpart of HESS J1858+020
摘要：
HESS J1858+020是一个弱伽马射线源，在任何波长都没有任何清晰的编目对应物。最近，源G35.6-0.4被重新识别为SNR。HESS源位于该遗迹的南部边界。这项工作的目的是调查的星际介质周围的上述来源，以寻找可能的对应的非常高的能量发射。利用银河系环巡天的13 CO J=1-0线和GLIMPSE的中红外数据，我们分析了HESS J1858+020和SNR G35.6-0.4的环境。13 CO数据显示，在SNR G35.6-0.4的南部边界存在一个分子云，与残留物的距离相同。这个云由两个分子团组成，一个位于SNR壳层上方，另一个位于HESS J1858+020的中心。我们估计每个团簇的分子质量和密度分别为~ 5 × 10^{3} Msun和~ 500 cm^{-3}。考虑到HESS J1858+020观测到的伽马射线通量，我们估计密度至少为150 cm^{-3}的分子云可以用强子学解释非常高的能量发射。因此，我们认为在HESS J1858+020中探测到的γ射线发射是由于强子机制。此外，分析中红外辐射，我们发现该区域在恒星形成中是活跃的，这可以被认为是解释极高能量辐射的替代或补充可能性。
英文摘要：
HESS J1858+020 is a weak gamma-ray source that does not have any clear cataloged counterpart at any wavelengths. Recently, the source G35.6-0.4 was re-identified as a SNR. The HESS source lies towards the southern border of this remnant. The purpose of this work is to investigate the interstellar medium around the mentioned sources in order to look for possible counterparts of the very-high energy emission. Using the 13CO J=1-0 line from the Galactic Ring Survey and mid-IR data from GLIMPSE we analyze the environs of HESS J1858+020 and SNR G35.6-0.4. The 13CO data show the presence of a molecular cloud towards the southern border of SNR G35.6-0.4 and at the same distance as the remnant. This cloud is composed by two molecular clumps, one, over the SNR shell and the other located at the center of HESS J1858+020. We estimate a molecular mass and a density of ~ 5 X 10^{3} Msun and ~ 500 cm^{-3}, respectively for each clump. Considering the gamma-ray flux observed towards HESS J1858+020, we estimate that a molecular cloud with a density of at least 150 cm^{-3} could explain the very-high energy emission hadronically. Thus, we suggest that the gamma-ray emission detected in HESS J1858+020 is due to hadronic mechanism. Additionally, analyzing mid-IR emission, we find that the region is active in star formation, which could be considered as an alternative or complementary possibility to explain the very-high energy emission.
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。
