A Radio Survey of the SMC at 843 MHz with the MOST: I. The Survey

Turtle, A. J.; Ye, Taisheng; Amy, S. W.; Nicholls, Jennifer

doi:10.1071/as98280

Cited by 18 publications

(15 citation statements)

References 12 publications

(13 reference statements)

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“…In addition to the ATCA+Parkes surveys, we also searched the 843 MHz Sydney University Molonglo Sky Survey [SUMSS; resolution ∼45 arcsec, sensitivity ∼2 mJy; Bock, Large & Sadler 1999] for sources co‐incident with known catalogued PNe. We also searched the specific MOlonglo Synthesis Telescope (MOST) observations of the SMC presented by Turtle et al (1998).…”

Section: Radio Datamentioning

confidence: 99%

Radio planetary nebulae in the Magellanic Clouds

Filipović¹,

Cohen²,

Reid³

et al. 2009

Monthly Notices of the Royal Astronomical Society

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We report the extragalactic radio‐continuum detection of 15 planetary nebulae (PNe) in the Magellanic Clouds (MCs) from recent Australia Telescope Compact Array+Parkes mosaic surveys. These detections were supplemented by new and high‐resolution radio, optical and infrared observations which helped to resolve the true nature of the objects. Four of the PNe are located in the Small Magellanic Cloud (SMC) and 11 are located in the Large Magellanic Cloud (LMC). Based on Galactic PNe the expected radio flux densities at the distance of the LMC/SMC are up to ∼2.5 and ∼2.0 mJy at 1.4 GHz, respectively. We find that one of our new radio PNe in the SMC has a flux density of 5.1 mJy at 1.4 GHz, several times higher than expected. We suggest that the most luminous radio PN in the SMC (N S68) may represent the upper limit to radio‐peak luminosity because it is approximately three times more luminous than NGC 7027, the most luminous known Galactic PN. We note that the optical diameters of these 15 Magellanic Clouds (MCs) PNe vary from very small (∼0.08 pc or 0.32 arcsec; SMP L47) to very large (∼1 pc or 4 arcsec; SMP L83). Their flux densities peak at different frequencies, suggesting that they may be in different stages of evolution. We briefly discuss mechanisms that may explain their unusually high radio‐continuum flux densities. We argue that these detections may help solve the ‘missing mass problem’ in PNe whose central stars were originally 1–8 M⊙. We explore the possible link between ionized haloes ejected by the central stars in their late evolution and extended radio emission. Because of their higher than expected flux densities, we tentatively call this PNe (sub)sample –‘Super PNe’.

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Section: Radio Datamentioning

confidence: 99%

Radio planetary nebulae in the Magellanic Clouds

Filipović¹,

Cohen²,

Reid³

et al. 2009

Monthly Notices of the Royal Astronomical Society

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“…Wong et al (2012) studied compact H ii regions in the SMC. Archive images were used at 3, 6, 13, 20 and 36 cm Filipovic et al 2002;Turtle et al 1998) plus images from the area near LHA 115-N 77 from Ye et al (1995). Additional images from near LHA 115-N 19 were used including ATCA images from array configurations of 375-m, 1.5D, 6C, 6B and 750A.…”

Section: Archival Data and New Radio-continuum Observationsmentioning

confidence: 99%

Radio planetary nebulae in the Small Magellanic Cloud

Leverenz¹,

Filipović²,

Bojičić³

et al. 2016

Astrophys Space Sci

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We present ten new radio continuum (RC) detections at catalogued planetary nebula (PN) positions in the Small Magellanic Cloud (SMC): SMP S6, LIN 41, LIN 142, SMP S13, SMP S14, SMP S16, J 18, SMP S18, SMP S19 and SMP S22. Additionally, six SMC radio PNe previously detected, LIN 45, SMP S11, SMP S17, LIN 321, LIN 339 and SMP S24 are also investigated (re-observed) here making up a population of 16 radio detections of catalogued PNe in the SMC. These 16 radio detections represent ∼15 % of the total catalogued PN population in the SMC. We show that six of these objects have characteristics that suggest that they are PN mimics: LIN 41, LIN 45, SMP S11, LIN 142, LIN 321 and LIN 339. We also present our

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“…In addition we make use of the Molonglo Observatory Synthesis Telescope (MOST) SMC survey at 36 cm (843 MHz) (Turtle et al 1998). The beam size for these observations ranges from 7 to 45 .…”

Section: Radio Observationsmentioning

confidence: 99%

IKT 16: a composite supernova remnant in the Small Magellanic Cloud

Owen

Filipović

Ballet

et al. 2011

A&A

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Aims. IKT 16 is an X-ray and radio-faint supernova remnant (SNR) in the Small Magellanic Cloud (SMC). A previous X-ray study of this SNR found a hard X-ray source near its centre. Using all available archival and proprietary XMM-Newton data, alongside new multi-frequency radio-continuum surveys and optical observations at Hα and forbidden [SII] and [OIII] lines, we aim to constrain the properties of the SNR and discover the nature of the hard source within. Methods. We combine XMM-Newton datasets to produce the highest quality X-ray image of IKT 16 to date. We use this, in combination with radio and optical images, to conduct a multi-wavelength morphological analysis of the remnant. We extract separate spectra from the SNR and the bright source near its centre, and conduct spectral fitting of both regions. Results. We find IKT 16 to have a radius of 37 ± 3 pc, with the bright source located 8 ± 2 pc from the centre. This is the largest known SNR in the SMC. The large size of the remnant suggests it is likely in the Sedov-adiabatic phase of evolution. Using a Sedov model to fit the SNR spectrum, we find an electron temperature kT of 1.03 ± 0.12 keV and an age of ≈14700 yr. The absorption found requires the remnant to be located deep within the SMC. The bright source is fit with a power law with index Γ = 1.58 ± 0.07, and is associated with diffuse radio emission extending towards the centre of the SNR. We argue that this source is likely to be the neutron star remnant of the supernova explosion, and infer its transverse kick velocity to be 580 ± 100 km s −1 . The X-ray and radio properties of this source strongly favour a pulsar wind nebula (PWN) origin.

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A Radio Survey of the SMC at 843 MHz with the MOST: I. The Survey

Cited by 18 publications

References 12 publications

Radio planetary nebulae in the Magellanic Clouds

Radio planetary nebulae in the Magellanic Clouds

Radio planetary nebulae in the Small Magellanic Cloud

IKT 16: a composite supernova remnant in the Small Magellanic Cloud

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