1 Ocak 2023 Dergi makalesi Açık Erişim

Avdan, H.; Sonbas, E.; Dhuga, K. S.; Vinokurov, A.; Goegues, E.; Avdan, S.; Solovyeva, Y. N.; Kostenkov, A. E.; Shablovinskaya, E. S.; Goktas, D.

Citation Style Language JSON

{
  "DOI": "10.1093/mnras/stad879", 
  "abstract": "<p>Archival XMM-Newton, Chandra, and Hubble Space Telescope(HST) data have been used to study the X-ray and optical properties of two candidate ultraluminous X-ray sources in NGC 4536. In order to search for potential optical counterparts, relative astrometry between Chandra and HST was improved, and as a result, optical counterparts were detected for both X-ray sources. To complement our findings (based on the archival data), ground-based optical spectra of the counterparts were obtained with the 6-m BTA (Big Telescope Alt-azimuth) Telescope located at the Special Astrophysical Observatory. The calculated redshift (z = 0.4391 +/- 0.0010) for one of the sources (X-3) indicates that the source is, in fact, a background active galactic nucleus. Two possible optical counterparts (s1 and s2) were found for X-2. Whether s1 is point-like or an extended source is unclear: If it is point-like and the emission is dominated by the donor, its spectral type indicates O-B star. The second source (s2) is point-like and is consistent with the colours and absolute magnitudes of a red supergiant.</p>", 
  "author": [
    {
      "family": "Avdan", 
      "given": " H."
    }, 
    {
      "family": "Sonbas", 
      "given": " E."
    }, 
    {
      "family": "Dhuga", 
      "given": " K. S."
    }, 
    {
      "family": "Vinokurov", 
      "given": " A."
    }, 
    {
      "family": "Goegues", 
      "given": " E."
    }, 
    {
      "family": "Avdan", 
      "given": " S."
    }, 
    {
      "family": "Solovyeva", 
      "given": " Y. N."
    }, 
    {
      "family": "Kostenkov", 
      "given": " A. E."
    }, 
    {
      "family": "Shablovinskaya", 
      "given": " E. S."
    }, 
    {
      "family": "Goktas", 
      "given": " D."
    }
  ], 
  "container_title": "MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY", 
  "id": "269454", 
  "issue": "4", 
  "issued": {
    "date-parts": [
      [
        2023, 
        1, 
        1
      ]
    ]
  }, 
  "page": "10", 
  "title": "Optical counterparts of two candidate ultraluminous X-ray sources in NGC 4536", 
  "type": "article-journal", 
  "volume": "521"
}