2020MNRAS.496.1834L


Query : 2020MNRAS.496.1834L

2020MNRAS.496.1834L - Mon. Not. R. Astron. Soc., 496, 1834-1844 (2020/August-1)

Atacama Compact Array observations of the pulsar-wind nebula of SNR 0540-69.3.

LUNDQVIST P., LUNDQVIST N., VLAHAKIS C., BJORNSSON C.-I., DICKEL J.R., MATSUURA M., SHIBANOV Y.A., ZYUZIN D.A. and OLOFSSON G.

Abstract (from CDS):

We present observations of the pulsar-wind nebula (PWN) region of SNR 0540-69.3. The observations were made with the Atacama Compact Array (ACA) in Bands 4 and 6. We also add radio observations from the Australia Compact Array at 3 cm. For 1.449-233.50 GHz, we obtain a synchrotron spectrum Fν ∝ναν, with the spectral index αν = 0.17 ± 0.02. To conclude how this joins the synchrotron spectrum at higher frequencies, we include hitherto unpublished AKARI mid-infrared data, and evaluate published data in the ultraviolet (UV), optical, and infrared (IR). In particular, some broad-band filter data in the optical must be discarded from our analysis due to contamination by spectral line emission. For the UV/IR part of the synchrotron spectrum, we arrive at αν = 0.87+0.08–0.10. There is room for 2.5 x 10–3 M of dust with a temperature of ∼55 K if there are dual breaks in the synchrotron spectrum, one around ∼9 x 1010 Hz and another at ∼2 x 1013 Hz. The spectral index then changes at ∼9 x 1010 Hz from αν = 0.14 ± 0.07 in the radio to αν = 0.35–0.07+0.05 in the millimetre-to-far-IR range. The ACA Band 6 data marginally resolve the PWN. In particular, the strong emission ∼ 1".5 south-west of the pulsar, seen at other wavelengths, and resolved in the 3 cm data with its 0.''8 spatial resolution, is also strong in the millimetre range. The ACA data clearly reveal the supernova remnant shell ∼20-35 arcsec west of the pulsar, and for the shell we derive αν = 0.64 ± 0.05 for the range 8.6-145 GHz.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): pulsars: individual: PSR B0540-69.3 - supernovae: general - ISM: SNR 0540-69.3 - ISM: supernova remnants - Magellanic Clouds

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10364 1
2 SNR B0102-72.3 SNR 01 04 01.2 -72 01 52           ~ 376 1
3 SNR G130.7+03.1 SNR 02 05 37.0 +64 49 42           ~ 592 4
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6410 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16246 1
6 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5074 0
7 M 1 SNR 05 34 32 +22 00.8           ~ 5955 1
8 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4738 2
9 PSR B0540-69 Psr 05 40 10.84 -69 19 54.2           ~ 852 3
10 PSR J1124-5916 Psr 11 24 39.1 -59 16 20           ~ 147 1
11 SNR G011.2-00.3 SNR 18 11 28.9 -19 25 29           ~ 270 1
12 SNR G021.5-00.9 SNR 18 33 33.612 -10 34 07.69           ~ 424 1
13 SNR G029.7-00.2 SNR 18 46 25.5 -02 59 14           ~ 321 2
14 SNR G054.1+00.3 SNR 19 30 31 +18 52.0           ~ 212 1
15 NAME Cas A SNR 23 23 24.000 +58 48 54.00     14.30     ~ 2629 1

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2022.09.27-04:17:17

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