J/ApJS/174/379 Optical imaging and spectra of 3C 58 (Fesen+, 2008)
Optical imaging and spectroscopy of the galactic supernova remnant 3C 58
(G130.7+3.1).
Fesen R., Rudie G., Hurford A., Soto A.
<Astrophys. J. Suppl. Ser., 174, 379-395 (2008)>
=2008ApJS..174..379F 2008ApJS..174..379F
ADC_Keywords: Spectroscopy ; Supernova remnants ; Interstellar medium
Keywords: ISM: individual (3C 58) - ISM: kinematics and dynamics
supernova remnants
Abstract:
We present a comprehensive imaging and spectroscopic survey of optical
emission knots associated with the young Galactic supernova remnant
3C 58. Hα images show hundreds of clumpy filaments and knots
arranged in a complex structure covering a nearly circular area
roughly 400" in diameter. A quite different emission structure is seen
in [OIII], where the brightest features are less clumpy and largely
confined to the remnant's northwest quadrant. Measured radial
velocities of over 450 knots reveal two distinct kinematic
populations; one with average and peak expansion velocities of 770 and
1100km/s, respectively, forming a thick shell, and the other showing
|v|≤250km/s. High-velocity knots (|v|≥500km/s) exhibit a strong
bipolar expansion pattern with redshifted and blueshifted knots
located in northeastern and southwestern regions, respectively. These
knots also show strong [NII]/Hα line emission ratios, suggesting
enhanced N/H. In contrast, the slower expanding knot population shows
much lower [NII]/Hα line ratios and likely represents
circumstellar mass loss material from the 3C 58 progenitor.
Proper-motion estimates using images spanning a 28yr time interval
suggest positional shifts of between 0.5" and 2.0", implying proper
motions of 0.02-0.07"/yr. These values agree with previous
estimates but are much less than the ∼0.2"/yr expected if 3C 58
were associated with historic guest star of 1181 CE.
Description:
Interference filter images of 3C 58 were obtained in 1994 September
using the McGraw-Hill 1.3m telescope at the MDM Observatory at Kitt
Peak. Low-dispersion, long-slit optical spectra of 3C 58 were
obtained on 1995 October 16-23 using the MDM 2.4m telescope.
Objects:
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RA (2000) DE Designation(s)
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02 05 37.92 +64 49 42.8 3C 58 = SNR G130.7+03.1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 82 461 Observed emission knots in 3C 58
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See also:
VII/15 : Galactic Supernova Remnants Catalogue (Ilovaisky+ 1972)
VII/14 : Galactic Supernova Remnants Catalogue (Clark+ 1976)
VII/253 : A Catalogue of Galactic Supernova Remnants (Green, 2009)
J/ApJS/179/195 : A catalogue of outer ejecta knots in Cas A (Hammell+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- [FRH2008] Knot identification (NAaa)
6 I1 h RAh Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 34 F6.1 arcsec x Relative x offset (1)
36- 41 F6.1 arcsec y Relative y offset (1)
43- 47 F5.1 arcsec r Radial distance (1)
49- 53 I5 km/s RV Radial velocity
55- 61 E7.1 mW/m2 FHa ? Integrated Hα flux
63- 66 F4.1 --- NII/Ha ? [NII]/Hα ratio
68- 70 F3.1 --- SIIr ? [SII]λ6716/S[II]λ6731 ratio
72- 74 F3.1 --- OI/Ha ? [OI]λ6300/Hα ratio
76- 78 F3.1 --- SII/Ha ? [SII]/Hα ratio
80- 82 F3.1 --- OIII/Ha ? [OIII]λ5007/Hα ratio
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Note (1): From PSR J0205+6449, 02:05:37.92+64:49:42.8 (J2000.0).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Sep-2009