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Showing 1–7 of 7 results
Advanced filters: Author: Ronald A. Remillard Clear advanced filters

  • A millihertz frequency X-ray quasi-periodic oscillation has been observed near the innermost orbit of an actively accreting supermassive black hole and its frequency has evolved significantly over 2 years, a phenomenon that is difficult to explain with existing models.

    • Megan Masterson
    • Erin Kara
    • Jingyi Wang
    Research
    Nature
    Volume: 638, P: 370-375

  • Models of stellar evolution have difficulty producing black holes in close binaries with masses ten times that of the sun, which is consistent with the fact that the most massive stellar black holes known so far all have masses within one standard deviation of that. This paper report a mass of 15.65 ±1.45 times that of the sun for the black hole in the recently discovered system M 33 X-7, which is located in the nearby galaxy Messier 33.

    • Jerome A. Orosz
    • Jeffrey E. McClintock
    • Tsevi Mazeh
    Research
    Nature
    Volume: 449, P: 872-875

  • Multiwavelength observations of a galactic nucleus exhibit quasi-periodic X-ray eruptions (QPEs) that repeat every 22 days, a timescale intermediate between those of other QPEs and so-called repeating nuclear transients. The eruptions are likely to be driven by the interaction between an orbiting body and a central massive black hole.

    • Muryel Guolo
    • Dheeraj R. Pasham
    • Elizabeth C. Ferrara
    Research
    Nature Astronomy
    Volume: 8, P: 347-358

  • A bright X-ray outburst from a massive star cluster 12.5 kpc from a galactic centre fits the profile of a tidal disruption event (TDE), indicating the likely presence of an intermediate-mass black hole (IMBH). TDEs could be the most effective way of identifying IMBHs.

    • Dacheng Lin
    • Jay Strader
    • Stephen D. J. Gwyn
    Research
    Nature Astronomy
    Volume: 2, P: 656-661