2013/07/30 by H. Zhu, W. W. Tian, D. F. Torres +2 · 18 citations
Physics and Astronomy · #Astrophysics and Star Formation Studies #Gamma-ray bursts and supernovae #H II region #Kinematics #Molecular cloud #Planetary nebula #Spectral line #Stellar, planetary, and galactic studies #Supernova #Supernova remnant #astro-ph.SR
paper · pdf · doi:10.1088/0004-637x/775/2/95
published in The Astrophysical Journal 775(2), 95 (IOP Publishing) · 10 pages, 21 figures, accepted for publication in ApJ
arxiv created 2013/07/30 · openalex publication_date 2013/09/11 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Two possible planetary nebulae (PN G035.5−00.4 and IRAS 18551+0159), one newly re-identified supernova remnant (SNR G35.6−0.4), and one H ii region (G35.6−0.5) form a line-of-sight-overlapping complex known as G35.6−0.5. We analyze 21 cm H i absorption spectra toward the complex to constrain the kinematic distances of these objects. PN G035.5−00.4 has a distance from 3.8 ± 0.4 kpc to 5.4 ± 0.7 kpc. IRAS 18551+0159 is at 4.3 ± 0.5 kpc. We discuss the distance for SNR 35.6−0.4, for which the previous estimate was 10.5 kpc, and find a plausible distance of 3.6 ± 0.4 kpc. The new distance of SNR G35.6−0.4 and the derived mass for the ∼55 km s −1 CO molecular cloud can accommodate an association with HESS J1858+020. We also conclude that SNR G35.6−0.4 is unlikely to be associated with PSR J1857+0210 or PSR J1857+0212, which are projected onto the SNR area.