Dust Destruction in Nonradiative Shocks
Zhu,H.1,2; Slane,P.2; Raymond,J.2; Tian,W. W.1,3,4
Source PublicationThe Astrophysical Journal
AbstractAbstract Supernova remnant (SNR) shock waves are the main place where interstellar dust grains are destroyed. However, the dust destruction efficiency in nonradiative shocks is still not well known. One way to estimate the fraction of dust destroyed is to compare the difference between postshock gas abundances and preshock medium total abundances when the preshock elemental depletion factors are known. We compare the postshock gas abundances of 16 SNRs in the Large Magellanic Cloud (LMC) with the LMC interstellar medium abundances that we derived based on 69 slow-rotating early B-type stars. We find that, on average, ~61% of Si-rich dust grains are destroyed in the shock, while the fraction of dust destroyed is only ~40% for Fe-rich dust grains. This result supports the idea that the high depletion of Fe in the diffuse neutral medium is not caused by the resilience of Fe-rich grains but because of faster growth rate. This work also presents a potential way to constrain the chemical composition of interstellar dust.
Keyworddust, extinction ISM: abundances ISM: supernova remnants
WOS IDIOP:0004-637X-882-2-ab3226
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China,
2.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA;,
3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
4.Department of Physics and Astronomy, University of Calgary, Calgary, AB T2N 1N4, Canada
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
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GB/T 7714
Zhu,H.,Slane,P.,Raymond,J.,et al. Dust Destruction in Nonradiative Shocks[J]. The Astrophysical Journal,2019,882(2).
APA Zhu,H.,Slane,P.,Raymond,J.,&Tian,W. W..(2019).Dust Destruction in Nonradiative Shocks.The Astrophysical Journal,882(2).
MLA Zhu,H.,et al."Dust Destruction in Nonradiative Shocks".The Astrophysical Journal 882.2(2019).
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