J/other/Sci/340.45 Fast shocks around SN 1006 (Nikolic+, 2013)
An integral view of fast shocks around supernova 1006.
Nikolic S., Van De Ven G., Heng K., Kupko D., Husemann B., Raymond J.C.,
Hughes J.P., Falcon-Barroso J.
<Science, 340, 45-48 (2013)>
=2013Sci...340...45N 2013Sci...340...45N
ADC_Keywords: Supernovae
Abstract:
Supernova remnants are among the most spectacular examples of
astrophysical pistons in our cosmic neighborhood. The gas expelled by
the supernova explosion is launched with velocities ∼1000 kilometers
per second into the ambient, tenuous interstellar medium, producing
shocks that excite hydrogen lines. We have used an optical
integral-field spectrograph to obtain high-resolution spatial-spectral
maps that allow us to study in detail the shocks in the northwestern
rim of supernova 1006. The two-component Hα line is detected at
133 sky locations. Variations in the broad line widths and the
broad-to-narrow line intensity ratios across tens of atomic mean free
paths suggest the presence of suprathermal protons, the potential seed
particles for generating high-energy cosmic rays.
Objects:
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RA (2000) DE Designation(s)
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15 02 22.1 -42 05 49 SN 1006 = SNR G327.6+14.6
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables1.dat 73 133 Properties of the shock front in the remnant of
SN 1006 for 133 spatially binned locations
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Byte-by-byte Description of file: tables1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Bin Sequential number of the (Voronoi) bin
5- 9 F5.2 arcsec xpos x coordinate of the bin centroid
11- 15 F5.2 arcsec ypos y coordinate of the bin centroid
17- 18 I2 --- Spx Number of combined pixels
20- 24 F5.2 --- S/N Signal-to-noise ratio
26- 29 I4 km/s Wobs Measured value of the broad component W
31- 33 I3 km/s E_Wobs Error on Wobs (upper value, 68% confidence level)
35- 37 I3 km/s e_Wobs Error on Wobs (lower value, 68% confidence level)
39- 42 F4.2 --- Ib/In Observed broad-to-narrow line intensity ratio
44- 47 F4.2 --- E_Ib/In Error on Ib/In (upper value, 68% confidence level)
49- 52 F4.2 --- e_Ib/In Error on Ib/In (lower value, 68% confidence level)
54- 57 F4.1 deg Incl Shock inclination angle (1)
59- 62 F4.2 --- rchi2 Reduced χ2 of the double-Gaussian fit to
the observed Hα line
64- 67 I4 km/s Vs Shock velocity
69- 73 F5.2 [-] logBeta ? Electron-to-proton temperature ratio β
of the best-fit shock model (2)
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Note (1): with typical uncertainty of 1.6° coming from a typical error
of 47km/s in ΔV).
Note (2): a blank indicates when the shock model hits the adopted boundary
limits of logβ=(-2; 0), likely because CR physics is missing.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Apr-2013