2012A&A...540A..28D


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST00:47:22

2012A&A...540A..28D - Astronomy and Astrophysics, volume 540A, 28-28 (2012/4-1)

Possible optical counterpart of PSR J1357-6429.

DANILENKO A., KIRICHENKO A., MENNICKENT R.E., PAVLOV G., SHIBANOV Y., ZHARIKOV S. and ZYUZIN D.

Abstract (from CDS):

PSR J1357-6429 is a Vela-like radio pulsar that has been recently detected in X-rays and γ-rays. It powers a compact tail-like X-ray pulsar wind nebula and X-ray-radio plerion associated with an extended TeV source HESS J1356-645. We present our deep optical observations with the Very Large Telescope to search for an optical counterpart of the pulsar and its nebula. The observations were carried out using a direct imaging mode in the V, R, and I bands. We also analysed archival X-ray data obtained with Chandra and XMM-Newton. In all three optical bands, we detect a point-like source with V=27.3±0.3, R=25.52±0.07, and I=24.13±0.05, whose position is within the 1σ error circle of the X-ray position of the pulsar, and whose colours are distinct from those of ordinary stars. We consider it as a candidate optical counterpart of the pulsar. If it is indeed the counterpart, its 5σ offset from the radio pulsar position, measured about 9yr earlier, implies that the transverse velocity of the pulsar is in the range of 1600-2000km/s at the distance of 2-2.5kpc, making it the fastest moving pulsar known. The direction of the estimated proper motion coincides with the extension of the pulsar's X-ray tail, suggesting that this is a jet. The tentative optical luminosity and efficiency of the pulsar are similar to those of the Vela pulsar, which also supports the optical identification. However, the candidate undergoes an unusually steep dereddened flux increase towards the infrared with a spectral index αν∼5, that is not typical of optical pulsars. It implies a strong double-knee spectral break in the pulsar emission between the optical and X-rays. The reasons for the spectral steepness are unclear. It may be caused by a nebula knot projected onto the jet and strongly overlapping with the pulsar, as observed for the Crab, where the knot has a significantly steeper spectrum than the pulsar. We find no other signs of the pulsar nebula in the optical. Alternatively, the detected source may be a faint AGN, that has not yet been seen at other wavelengths. The position and peculiar colours of the detected source suggest that it is an optical counterpart of the pulsar. Further high spatial-resolution infrared observations can help to verify its real nature.

Abstract Copyright:

Journal keyword(s): stars: neutron - ISM: supernova remnants - pulsars: general - pulsars: individual: PSR J1357-6429

CDS comments: Paragraph 2.3 standard field L107 not in Simbad. Fig. 10 Pulsars not found (incomplete format).

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           F 4710 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5486 4
3 PSR B0540-69 Psr 05 40 10.84 -69 19 54.2           ~ 784 2
4 NAME Geminga Psr 06 33 54.153 +17 46 12.91           ~ 1066 0
5 PSR B0656+14 Psr 06 59 48.183 +14 14 21.54   24.85 24.90     ~ 737 1
6 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1089 2
7 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545           ~ 2010 1
8 NGC 2818 PN 09 16 01.4879747574 -36 37 37.531389997   12.5 12.50     ~ 258 0
9 [DSH95] 309.8-2.6 SR? 13 56.0 -64 36           ~ 5 0
10 PSR J1357-6429 Psr 13 57 02.525 -64 29 29.89           ~ 109 1
11 PSR B1508+55 Psr 15 09 25.7 +55 31 33           ~ 260 1
12 NAME E 7 Region reg 17 22 +45.0           ~ 15 0
13 LDN 107 DNe 17 26.0 -22 18           ~ 4 0
14 PSR B2223+65 Psr 22 25 52.36 +65 35 33.8           ~ 276 0
15 NAME Centaurus Arm PoG ~ ~           ~ 70 0
16 NAME Scutum Region reg ~ ~           ~ 28 0

    Equat.    Gal    SGal    Ecl

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2019.10.16-00:47:22

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