Celestial hemisphere:  Southern  ·  Constellation: Centaurus (Cen)

Image of the day 06/24/2024

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    New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?, Patrick Dufour
    New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?
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    New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?

    Image of the day 06/24/2024

    Getting plate-solving status, please wait...
      New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?, Patrick Dufour
      New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?
      Powered byPixInsight

      New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?

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      Description

      DISCLAIMER

      I am really excited to present the discovery of a previously unnoticed structure most likely associated with an SNR. I do not take lightly the fact that this discovery is only at the very beginning of analyzes and that many steps are to come in order to adequately document such an object. I have the immense privilege of being able to be accompanied and guided in my efforts by the astrophysicist Prof. Laurent Drissen from Laval University. Documentation work will therefore be underway on this page in the coming weeks.

      Thank you for taking this into consideration, but I would also be happy to get your comments on the subject.

      Unofficial SNR-DUFOUR1:
      • Discoverer: Patrick Dufour
      • Unofficial name: SNR-DUFOUR1
      • Constellation: Centaurus
      • Coordinates: 13h14m00s.10  -63°28′58″
      • Image processing: Patrick Dufour
      • Data acquisition, data compilation, data preparation: Patrick Dufour
      • Scientific lead: Pr. Laurent Drissen, Laval University (CAN)

      Context of discovery

      It will not be a surprise to learn that it was during one of my searches for areas with gaseous material that this object was discovered by chance. On one of the shots I took with the OIII filter in an area rich in H-Alpha, I noticed some stringy lines at the edge of the image field which were revealed in starless image version. This area of ​​Centaurus is quite rich in stars and it is easy to understand how such an faint object could go unnoticed without paying particular attention to it. By doing an iterative scan in the area I was able to define what undoubtedly corresponds to the most important thing we can capture from this nebula, at least for the moment.

      13-06-2024

      More likely a Supernova Remnant Nebula


      The morphology of this object with arcs and shells is found in many cases of SNR while the shock waves from the disappeared stars come excited the layers of gaseous materials. As in other cases of SNR studied, its appearance turns out to be very different depending on the filter used. There is also no entry in the Green catalog corresponding to the coordinates of the object that I am presenting to you  (ref. https://www.mrao.cam.ac.uk/surveys/snrs/snrs.data.html )

      The area in Aladin
      aladin_field.png

      Classic RGB image - uncropped

      RGB_SNR_PDUF1.jpg

      OIII Filter raw image - uncropped

      Yes, the OIII signal is very weak, as you can see in this 28.5 hour image!
      OIII_raw.jpg

      OIII Filter starless - uncropped but stretched

      Oiii_starless.jpg

      H-Alpha Filter starless - uncropped but stretched

      Ha_starless.jpg

      21-06-2024

      A region already studied in a scientific article


      It's not a big surprise that this region so close to the galactic plane has been studied by more teams of researchers. In this area, the star Centaurus Θ Mus was found to be a Wolfrayet object, thus influencing the cosmic landscape by its presence. Through Marcel Drechsler whom I thank, Professor Robert A. Fesen shared with us a very interesting study revealing the presence of an SNR whose measurements were carried out in an area approximately 2 degrees from our structure. Based on their data, in this paper (https://arxiv.org/pdf/0910.1546),  the researchers concluded that Θ Mus (WR 48) should be reclassified as a WolfRayet star without a clearly identified associated WR nebula. They also propose the existence of a new optically detected SNR in the final phase of dissipation and compiled corroborating data spectroscopic, morphological, radio, X-ray and infrared costs evidence supporting this newly discovered Galactic SNR G304.4-3.1 which is at least 45 arc minutes in diameter. Are we revealing the presence of a much larger object coming from the same source and we're just putting the pieces together?

      More to come...

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      New SNR structure revealed – Huge potential supernova remnant in Centaurus revealed?, Patrick Dufour