Year 2020,
Volume: 1 Issue: 1, 305 - 307, 11.12.2020
Şenay Avdan
Hasan Avdan
Aysun Akyüz
Nazım Aksaker
Alexander Vınokurov
Sergei Fabrıka
References
- Aird, J., Nandra, K., Laird, E.S. ve ark.: The Evolution of the Hard X-ray Luminosity Function of AGN. Monthly Notices of the Royal Astronomical Society. 401 (2010) 2531--2551
- Begelman, M.C.: Super-Eddington Fluxes from Thin Accretion Disks?. Astrophysical Journal. 568 (2002) 97--100
- Drozdovsky, I.O., Karachentsev, I.D.: Vizier Online Data Catalog: BVRI Photometry of 6 Galaxies. Astronomy and Astrophysics Supplement. 142 (2000) 425--432
- Feng, H., Soria, R.: Ultraluminous X-ray sources in the Chandra and XMM-Newton era. New Astronomy Reviews. 55 (2013) 166--183
- King, A.R., Davies, M.B., Ward, M.J., Fabbiano, G., Elvis, M.: Ultraluminous X-ray sources in External Galaxies. Astrophysical Journal. 552 (2001) 109--112
- Miller, M.C., Colbert, E.J.M.: Intermediate-Mass Black Holes. International Journal of Modern Physics D. 13 (2004) 1--64
- Oke, J.B.: Faint Spectrophotometric Standard Stars. Astronomical Journal. 99 (1990) 1621--1631
- Pintore, F., Zampieri, L., Wolter, A., Belloni, T.: Ultraluminous X-ray Sources: A Deeper Insight into Their Spectral Evolution. Monthly Notices of the Royal Astronomical Society. 439 (2014) 3461--3475
- Schlegel, D.J., Finkbeiner, D.P., Davis, M.: Maps of Dusts Infrared Emission for use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds. Astrophysical Journal. 500 (1998) 525--553
- Sutton, A.D., Roberts, T.P., Middleton, M.J.: The Ultraluminous State revisited: Fractional Variability and Spectral Shape as Diagnostics of Super-Eddington Accretion. Monthly Notices of the Royal Astronomical Society. 435 (2013) 1758--1775
- Swartz, D.A., Soria, R., Tennant, A.F., Yukita, M.: A Complete Sample of Ultraluminous X-ray Sources Host Galaxies. Astrophysical Journal. 741 (2011) 49--59
- Tao, L., Feng, H., Grise, F., Kaaret, P.: Compact Optical Counterparts of Ultraluminous X-ray Sources. Astrophysical Journal. 737 (2011) 81--95
- Vinokurov, A., Fabrika, S., Atapin, K.: Ultraluminous X-ray Sources as Supercritical Accretion Disks: Spectral Energy Distributions. Astrophysical Bulletin. 68 (2013) 139--153
- Yang, L., Feng, H., Kaaret, P.: The Optical Counterpart of NGC 1313 X-1. Astrophysical Journal. 733 (2011) 118--124
NGC 5474 Galaksisinde Bulunan Bir AXK'nın Optik Karşılığı ve Çevresinin Araştırılması
Year 2020,
Volume: 1 Issue: 1, 305 - 307, 11.12.2020
Şenay Avdan
Hasan Avdan
Aysun Akyüz
Nazım Aksaker
Alexander Vınokurov
Sergei Fabrıka
Abstract
Bu çalışmada, NGC 5474 galaksisinde bulunan bir AXK'nın X-ışın verileri tekrar analiz edilmiş ve optik karşılığı araştırılmıştır. {\it HST} görüntüleri incelendiğinde kaynağın optik karşılığının çok sönük olduğu ($m_{V}$ $=$ 24.7) belirlenmiştir. NGC 5474 X-1'in X-ışınlarında {\it Chandra} verilerinin analizi sonucu, kaynağın tayfına Power-law (PL) modeli en iyi uyumu göstermiştir ($\Gamma$ $=$0.95). PL modelinden elde edilen akı değeri kullanılarak kaynağın X-ışın ışıma gücü $L_{X}$ $=$ 1.7$\times 10^{40}$ erg s$^{-1}$ olarak hesaplanmıştır. NGC 5474 X-1'in SAO RAS BTA-6m teleskobu ile alınan optik tayfı incelendiğinde kaynağın çok yakınında bulunan bir yıldızdan ($m_{V}$ $=$ 23) gelen ışımanın katkısı dikkate alınmıştır. Ayrıca slit içerisinde bir ard-alan galaksisi ve yeni bir genç yıldız kümesi belirlenmiştir. AXK X-1 kaynağını daha iyi sınıflandırılabilmek için $L_{X}$/$L_{opt}$ değeri hesaplanmış ve bu değer $\sim$ 7000 olarak bulunmuştur.
References
- Aird, J., Nandra, K., Laird, E.S. ve ark.: The Evolution of the Hard X-ray Luminosity Function of AGN. Monthly Notices of the Royal Astronomical Society. 401 (2010) 2531--2551
- Begelman, M.C.: Super-Eddington Fluxes from Thin Accretion Disks?. Astrophysical Journal. 568 (2002) 97--100
- Drozdovsky, I.O., Karachentsev, I.D.: Vizier Online Data Catalog: BVRI Photometry of 6 Galaxies. Astronomy and Astrophysics Supplement. 142 (2000) 425--432
- Feng, H., Soria, R.: Ultraluminous X-ray sources in the Chandra and XMM-Newton era. New Astronomy Reviews. 55 (2013) 166--183
- King, A.R., Davies, M.B., Ward, M.J., Fabbiano, G., Elvis, M.: Ultraluminous X-ray sources in External Galaxies. Astrophysical Journal. 552 (2001) 109--112
- Miller, M.C., Colbert, E.J.M.: Intermediate-Mass Black Holes. International Journal of Modern Physics D. 13 (2004) 1--64
- Oke, J.B.: Faint Spectrophotometric Standard Stars. Astronomical Journal. 99 (1990) 1621--1631
- Pintore, F., Zampieri, L., Wolter, A., Belloni, T.: Ultraluminous X-ray Sources: A Deeper Insight into Their Spectral Evolution. Monthly Notices of the Royal Astronomical Society. 439 (2014) 3461--3475
- Schlegel, D.J., Finkbeiner, D.P., Davis, M.: Maps of Dusts Infrared Emission for use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds. Astrophysical Journal. 500 (1998) 525--553
- Sutton, A.D., Roberts, T.P., Middleton, M.J.: The Ultraluminous State revisited: Fractional Variability and Spectral Shape as Diagnostics of Super-Eddington Accretion. Monthly Notices of the Royal Astronomical Society. 435 (2013) 1758--1775
- Swartz, D.A., Soria, R., Tennant, A.F., Yukita, M.: A Complete Sample of Ultraluminous X-ray Sources Host Galaxies. Astrophysical Journal. 741 (2011) 49--59
- Tao, L., Feng, H., Grise, F., Kaaret, P.: Compact Optical Counterparts of Ultraluminous X-ray Sources. Astrophysical Journal. 737 (2011) 81--95
- Vinokurov, A., Fabrika, S., Atapin, K.: Ultraluminous X-ray Sources as Supercritical Accretion Disks: Spectral Energy Distributions. Astrophysical Bulletin. 68 (2013) 139--153
- Yang, L., Feng, H., Kaaret, P.: The Optical Counterpart of NGC 1313 X-1. Astrophysical Journal. 733 (2011) 118--124