全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

Distances and Evolutionary States of Supernova Remnant G18.9-1.1 and Candidate G28.6+0.0

DOI: 10.4236/jhepgc.2020.61002, PP. 9-19

Keywords: Supernova Remnants, Radio Continuum, Radio Lines

Full-Text   Cite this paper   Add to My Lib

Abstract:

HI spectra of the supernova remnant G18.9-1.1 and the supernova remnant candidate G28.6+0.0 are analyzed. We compared the spectra to 13CO emission spectra and to spectra of HII regions in the area to determine kinematic distances. G18.9-1.1 is at 2.1 ± 0.4 kpc and G28.6+0.0 is at 9.0 ± 0.3 kpc from the Sun. Using the published X-ray spectra of G18.9-1.1, we apply supernova remnant models for shocked-ISM temperature and emission measure. We find that G18.9-1.1 has low, but not atypical, explosion energy of ≈3 × 1050 erg and is in a low-density region of the ISM, ~0.1 cm-3. It has age ~3700 yr if the ejecta mass is 1.4 M, typical of Type Ia SNe, or ~4700 yr if the ejecta mass is 5 M typical of core-collapse SN. The candidate G28.6+0.0 does not have reported X-ray emission, so we apply a basic Sedov model. The Sedov age is ~600 yr if the ISM density is 1 cm-3 but could be as old as ~6000 yr if the ISM density is as high as 100 cm-3.

References

[1]  Green, D.A. (2019) VizieR Online Data Catalog: A Catalogue of Galactic Supernova Remnants (Green 2019). VizieR On-Line Data Catalog: VII/284. Cavendish Laboratory, Cambridge.
[2]  Ranasinghe, S. and Leahy, D.A. (2017) Distances to Supernova Remnants G31.9+0.0 and G54.4-0.3 Associated with Molecular Clouds. The Astrophysical Journal, 843, 119-126.
https://doi.org/10.3847/1538-4357/aa7894
[3]  Ranasinghe, S. and Leahy, D.A. (2018) Revised Distances to 21 Supernova Remnants. The Astronomical Journal, 155, 204-215.
https://doi.org/10.3847/1538-3881/aab9be
[4]  Ranasinghe, S. and Leahy, D.A. (2018) Distances to Supernova Remnants G20.4+0.1, G24.7-0.6, and G28.6-0.1 and New Molecular Cloud Associations. Monthly Notices of the Royal Astronomical Society, 477, 2243-2250.
https://doi.org/10.1093/mnras/sty817
[5]  Ranasinghe, S., Leahy, D.A. and Tian, W.W. (2018) New Distances to Four Supernova Remnants. Open Physics Journal, 4, 1-13.
https://doi.org/10.2174/1874843001804010001
[6]  Tian, W.W., et al. (2019) The Kinematic Distances of SNR G16.7+0.1 and G15.9+0.2 by Analyzing HI Absorption Spectra. Publications of the Astronomical Society of the Pacific, 131, 114301-114312.
https://doi.org/10.1088/1538-3873/ab35f4
[7]  Leahy, D.A. and Ranasinghe, S. (2018) Evolutionary Models for 15 Galactic Supernova Remnants with New Distances. The Astrophysical Journal, 866, 9.
https://doi.org/10.3847/1538-4357/aade48
[8]  Fürst, E., Reich, W., Reich, P., Sofue, Y. and Handa, T. (1985) A New Non-Thermal Galactic Radio Source with a Possible Binary System. Nature, 314, 720-721.
https://doi.org/10.1038/314720a0
[9]  Odegard, N. (1986) 57.5 MHz Observations of Extended Nonthermal Sources in the Galactic Plane. The Astronomical Journal, 92, 1372-1380.
https://doi.org/10.1086/114270
[10]  Fürst, E., et al. (1989) A Study of the Composite Supernova Remnant G 18.95-1.1. Astronomy and Astrophysics, 209, 361-368.
[11]  Sun, X.H., et al. (2011) A Sino-German λ6 cm Polarization Survey of the Galactic plane. VII. Small Supernova Remnants. Astronomy and Astrophysics, 536, A83.
https://doi.org/10.1051/0004-6361/201117693
[12]  Anderson, L.D., et al. (2017) Galactic Supernova Remnant Candidates Discovered by THOR. Astronomy and Astrophysics, 605, A58.
https://doi.org/10.1051/0004-6361/201731019
[13]  Helfand, D.J., Velusamy, T., Becker, R.H. and Lockman, F.J. (1989) The Prevalence of Supernova Remnants among Unidentified Galactic Radio Sources. The Astrophysical Journal, 341, 151-162.
https://doi.org/10.1086/167479
[14]  Bamba, A., Ueno, M., Koyama, K. and Yamauchi, S. (2001) A Diffuse X-Ray Source, AX J1843.8-0352: Association with the Radio Complex G28.6-0.1 and Identification of a New Supernova Remnant. Publications of the Astronomical Society of Japan, 53, L21-L24.
https://doi.org/10.1093/pasj/53.4.L21
[15]  Ferrand, G. and Safi-Harb, S. (2012) A Census of High-Energy Observations of Galactic Supernova Remnants. Advances in Space Research, 49, 1313-1319.
https://doi.org/10.1016/j.asr.2012.02.004
[16]  Stil, J.M., et al. (2006) The VLA Galactic Plane Survey. The Astronomical Journal, 132, 1158-1176.
https://doi.org/10.1086/505940
[17]  Jackson, J.M., et al. (2006) The Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey. The Astrophysical Journal Supplement Series, 163, 145-159.
https://doi.org/10.1086/500091
[18]  Leahy, D. and Tian, W. (2010) Distances to Supernova Remnants from H I Absorption Spectra. The Dynamic Interstellar Medium: A Celebration of the Canadian Galactic Plane Survey, 438, 365.
[19]  Beuther, H., et al. (2016) The HI/OH/Recombination Line Survey of the Inner Milky Way (THOR). Survey Overview and Data Release 1. Astronomy and Astrophysics, 595, A32.
https://doi.org/10.1051/0004-6361/201629143
[20]  Persic, M., Salucci, P. and Stel, F. (1996) The Universal Rotation Curve of Spiral Galaxies-I. The Dark Matter Connection. Monthly Notices of the Royal Astronomical Society, 281, 27-47.
https://doi.org/10.1093/mnras/278.1.27
[21]  Reid, M.J., et al. (2014) Trigonometric Parallaxes of High Mass Star Forming Regions: The Structure and Kinematics of the Milky Way. The Astrophysical Journal, 783, 130-143.
https://doi.org/10.1088/0004-637X/783/2/130
[22]  Shan, S.S., et al. (2018) Distances of Galactic Supernova Remnants Using Red Clump Stars. The Astrophysical Journal Supplement Series, 238, 35-46.
https://doi.org/10.3847/1538-4365/aae07a
[23]  Anderson, L.D., et al. (2015) Finding Distant Galactic HII Regions. The Astrophysical Journal Supplement Series, 221, 26-36.
https://doi.org/10.1088/0067-0049/221/2/26
[24]  Lockman, F.J. (1989) A Survey of Radio H II Regions in the Northern Sky. The Astrophysical Journal Supplement Series, 71, 469-479.
https://doi.org/10.1086/191383
[25]  Anderson, L.D., Bania, T.M., Balser, D.S. and Rood, R.T. (2011) The Green Bank Telescope H II Region Discovery Survey. II. The Source Catalog. The Astrophysical Journal Supplement Series, 194, 32-51.
https://doi.org/10.1088/0067-0049/194/2/32
[26]  Fürst, E., Reich, W. and Aschenbach, B. (1997) New Radio and Soft X-Ray Observations of the Supernova Remnant G 18.95-1.1. Astronomy and Astrophysics, 319, 655-663.
[27]  Harrus, I.M., Slane, P.O., Hughes, J.P. and Plucinsky, P.P. (2004) An X-Ray Study of the Supernova Remnant G18.95-1.1. The Astrophysical Journal, 603, 152-158.
https://doi.org/10.1086/381355
[28]  Leahy, D., Wang, Y., Lawton, B., Ranasinghe, S. and Filipovic, M. (2019) Emission Measures and Emission-Measure-Weighted Temperatures of Shocked Interstellar Medium and Ejecta in Supernova Remnants. The Astronomical Journal, 158, 149-166.
https://doi.org/10.3847/1538-3881/ab3d2c
[29]  White, R.L. and Long, K.S. (1991) Supernova Remnant Evolution in an Interstellar Medium with Evaporating Clouds. The Astrophysical Journal, 373, 543-555.
https://doi.org/10.1086/170073
[30]  Truelove, J.K. and McKee, C.F. (1999) Evolution of Nonradiative Supernova Remnants. The Astrophysical Journal Supplement Series, 120, 299-326.
https://doi.org/10.1086/313176
[31]  Leahy, D.A. (2017) Energetics and Birth Rates of Supernova Remnants in the Large Magellanic Cloud. The Astrophysical Journal, 837, 36-41.
https://doi.org/10.3847/1538-4357/aa60c1

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133