a young pulsar with a long radio trail emerging from snr g315.9-0.0 f. camilo, c.-y. ng et al. arxiv...
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![Page 1: A young pulsar with a long radio trail emerging from SNR G315.9-0.0 F. Camilo, C.-Y. NG et al. arxiv :0908.2421v1](https://reader033.vdocuments.us/reader033/viewer/2022050714/56649d495503460f94a2570e/html5/thumbnails/1.jpg)
A young pulsar with a long radio trail emergA young pulsar with a long radio trail emerging from SNR G315.9-0.0ing from SNR G315.9-0.0
F. Camilo, C.-Y. NG et al.
arxiv :0908.2421v1
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目录
Introduction
Discussion
Observations and results
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Introduction
Frying pan SNR G315.9-0.0
contour 2.5 5 7.5
10 15 and 20mJy
Shell ~13'
Jet like tail ~8' no IR
counterpart
Mills 1981 MOST@843MHz
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MOST @843MHzWhiteoak&Green 1996
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Observations and results
Image fromATCA 2.4 GHz
ATNF Parkes2008 June 17 6.1 hr @1374MHzwith 288MHz BW
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Identified pulsar PSR J1437-595
9
P~61ms
DM=549pc cm-3
D~8kpc(from Cordes&Lazio NE2
001 electron density model)
~50% linearly polarized througho
ut the pulse profile
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9.6ks Swift observation on 2008 July 5
only one photon within 5" of the pulsar position
NH =1.6 × 1022 cm−2
photon index Γ = 1.5
assume 5 photons as the limit
fX < 4.5 × 10−14 erg cm−2 s−1
LX < 3.5 × 1032 d8^2 erg s−1
LX / Edot < 2.5 × 10−4 d8^2
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Discussion
Suggesting PSR association with the SNR NE2001 model uncertainty for the system~25%
d8 = 1 ± 0.25 τc = 114 kyr
τ114 = τ/τc
Vt = 300 d8/τ114 km s−1
RSNR = 17 d8 pc the SNR shell radius is small for such the age 114 kyr
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Sedov solution constraints on age τ≈ 22 d8
5/2(n0/E51)1/2 kyr
hydrogen ambient medium density n0cm-3
SN explosion kinetic energy 1051E51
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Other constraints on age
the trail ~RSNR = 17 d8 pc τc = 114 kyr
The pulsar wind trail collimated for about 50kyr. Detailed study of PWN will find if it's resonable.(under way using ATCA)
If τ114 = τ/τc<<1, e.g. τ114∽0.2, Vt≈ 1500 km s−1
The proper motion is µ = 8/τ114 mas yr−1 , this could be measurable with the ATCA.
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PSR J1437–5959 has a very small flux density
luminosity L1.4 ≡ S1.4d2≈5d8^2 mJy kpc2
now unremarkable following numerous young pulsar disc
overies in recent years
Parkes multibeam survey 1997(Manchester et al. 2001)
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the faint tail of the population remains out of reach in a significant Galactic volume
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谢谢观赏谢谢观赏