Tahir Yaqoob

Tahir Yaqoob

  • RESEARCH SCIENTIST
  • 301.286.5015
  • NASA/GSFC
  • Mail Code: 662
  • Greenbelt , MD 20771
  • Employer: UNIVERSITY OF MARYLAND BALTIMORE CO
  • Brief Bio

    Dr. Tahir Yaqoob is a senior research scientist affiliated with the University of Maryland Baltimore Country (UMBC), and the Center for Research and Exploration in Space Science and Technology (CRESSTII), specializing in the area of X-ray astrophysics, with more than 25 years experience. He has been a member of the "Science Working Group" (SWG) for a number of X-ray astronomy missions (ASCA, Astro-E, Astro-E2 (Suzaku), and Hitomi). Dr. Yaqoob's most active areas of research concern X-ray observations and modeling of physical processes in accreting black-hole systems, from the extreme conditions in the vicinity of the black hole, out to the parsec-scale circumnuclear environment. Dr. Yaqoob also had more than 25 years experience teaching and mentoring physics, math, and astronomy, from pre-undergraduate to post-Ph.D. levels.

    Research Interests

    X-ray Spectroscopy

    Data analysis methods

    Modeling physical processes in accreting black-hole and compact object systems

    Radiation processes in astrophysical sources

    Compton-thick X-ray sources

    Active Galactic Nuclei (AGN), quasars

    Positions/Employment

    8/1990 - 9/1991

    Royal Society/JSPS Postdoctoral Fellowship

    Institute of Space and Astronautical Science, Sagamihara, Kanagawa, Japan
    10/1991 - 9/1992

    Royal Society/JSPS Postdoctoral Fellowship

    Institute of Astronomy, Cambridge, UK
    10/1992 - 4/2000

    Research Scientist

    USRA, NASA/Goddard Space Flight Center, MD, USA
    5/2000 - 9/2000

    Research Scientist

    University of Maryland Baltimore Country (UMBC), Maryland, USA (located at GSFC)
    10/2000 - 5/2013

    Principal Research Scientist

    Johns Hopkins University, Baltimore, USA
    5/2013 - Present

    Senior Research Scientist

    University of Maryland Baltimore Country (UMBC), Maryland, USA (located at GSFC)

    Education

    Tahir Yaqoob obtained a B.A. (Hons) in Physics at the University of Oxford, UK, in 1986, and a PhD in X-ray Astrophysics at the University of Leicester, UK, in 1990. He subsequently continued his research in X-ray astronomy at the Institute of Space and Astronautical Science (ISAS), Japan, on a Royal Society/JSPS Fellowship, and then at the Institute of Astronomy, Cambridge, UK, on a Royal Society Fellowship.

    Selected Publications

    Refereed

    Yaqoob, T., T. J. Turner, M. M. Tatum, M. Trevor, and A. Scholtes. 2016. "No signatures of black hole spin in the X-ray spectrum of the Seyfert 1 galaxy Fairall 9." Monthly Notices of the Royal Astronomical Society, 462 (4): 4038-4054 [10.1093/mnras/stw1824]

    Yaqoob, T., M. M. Tatum, A. Scholtes, A. Gottlieb, and T. J. Turner. 2015. "A Compton-thin solution for theSuzakuX-ray spectrum of the Seyfert 2 galaxy Mkn 3." Monthly Notices of the Royal Astronomical Society, 454 (1): 973-990 [10.1093/mnras/stv2021]

    Yaqoob, T. 2012. "The nature of the Compton-thick X-ray reprocessor in NGC 4945." Monthly Notices of the Royal Astronomical Society, 423 (4): 3360-3396 [10.1111/j.1365-2966.2012.21129.x]

    Yaqoob, T., K. D. Murphy, L. Miller, and T. J. Turner. 2010. "On the efficiency of production of the Fe Kα emission line in neutral matter." Monthly Notices of the Royal Astronomical Society, 401: 411 [Full Text (Link)] [10.1111/j.1365-2966.2009.15657.x]

    Yaqoob, T., K. D. Murphy, R. E. Griffiths, et al. Y. Haba, H. Inoue, T. Itoh, R. L. Kelley, M. Kokubun, A. G. Markowitz, R. F. Mushotzky, T. Okajima, A. F. Ptak, J. Reeves, P. J. Serlemitsos, T. Takahashi, and Y. Terashima. 2007. "Precision Fe Kα and Fe Kβ Line Spectroscopy of the Seyfert 19 Galaxy NGC 2992 with Suzaku." Publications of the Astronomical Society of Japan, Vol59, NoSP1, pp283-299, 59: 283 [Full Text (Link)]

    Murphy, K. D., T. Yaqoob, and Y. Terashima. 2007. "Monitoring the Violent Activity from the Inner Accretion Disk of the Seyfert 19 Galaxy NGC 2992 with RXTE." The Astrophysical Journal, 666: 96 [Full Text (Link)] [10.1086/520039]

    McKernan, B., T. Yaqoob, and C. S. Reynolds. 2007. "A soft X-ray study of type I active galactic nuclei observed with Chandra high-energy transmission grating spectrometer." Monthly Notices of the Royal Astronomical Society, 379: 1359 [Full Text (Link)] [10.1111/j.1365-2966.2007.11993.x]

    Yaqoob, T., and P. Serlemitsos. 2005. "Iron K Features in the Quasar E1821+643: Evidence for Gravitationally Redshifted Absorption?" The Astrophysical Journal, 623: 112 [Full Text (Link)] [10.1086/428432]

    Dovčiak, M., V. Karas, and T. Yaqoob. 2004. "An Extended Scheme for Fitting X-Ray Data with Accretion Disk Spectra in the Strong Gravity Regime." The Astrophysical Journal Supplement Series, 153: 205 [Full Text (Link)] [10.1086/421115]

    Yaqoob, T., and U. Padmanabhan. 2004. "The Cores of the Fe K Lines in Seyfert 1 Galaxies Observed by the Chandra High Energy Grating." The Astrophysical Journal, 604: 63 [Full Text (Link)] [10.1086/381731]

    Yaqoob, T., I. M. George, T. R. Kallman, et al. U. Padmanabhan, K. A. Weaver, and T. J. Turner. 2003. "Fe XXV and Fe XXVI Diagnostics of the Black Hole and Accretion Disk in Active Galaxies: Chandra Time-resolved Grating Spectroscopy of NGC 7314." The Astrophysical Journal, 596: 85 [Full Text (Link)] [10.1086/377687]

    Benlloch, S., J. Wilms, R. Edelson, T. Yaqoob, and R. Staubert. 2001. "Quasi-periodic Oscillation in Seyfert Galaxies: Significance Levels The Case of Markarian 766." The Astrophysical Journal, 562: L121 [Full Text (Link)] [10.1086/338252]

    Brief Bio

    Dr. Tahir Yaqoob is a senior research scientist affiliated with the University of Maryland Baltimore Country (UMBC), and the Center for Research and Exploration in Space Science and Technology (CRESSTII), specializing in the area of X-ray astrophysics, with more than 25 years experience. He has been a member of the "Science Working Group" (SWG) for a number of X-ray astronomy missions (ASCA, Astro-E, Astro-E2 (Suzaku), and Hitomi). Dr. Yaqoob's most active areas of research concern X-ray observations and modeling of physical processes in accreting black-hole systems, from the extreme conditions in the vicinity of the black hole, out to the parsec-scale circumnuclear environment. Dr. Yaqoob also had more than 25 years experience teaching and mentoring physics, math, and astronomy, from pre-undergraduate to post-Ph.D. levels.

    Selected Publications

    Refereed

    Yaqoob, T., T. J. Turner, M. M. Tatum, M. Trevor, and A. Scholtes. 2016. "No signatures of black hole spin in the X-ray spectrum of the Seyfert 1 galaxy Fairall 9." Monthly Notices of the Royal Astronomical Society 462 (4): 4038-4054 [10.1093/mnras/stw1824]

    Yaqoob, T., M. M. Tatum, A. Scholtes, A. Gottlieb, and T. J. Turner. 2015. "A Compton-thin solution for theSuzakuX-ray spectrum of the Seyfert 2 galaxy Mkn 3." Monthly Notices of the Royal Astronomical Society 454 (1): 973-990 [10.1093/mnras/stv2021]

    Yaqoob, T. 2012. "The nature of the Compton-thick X-ray reprocessor in NGC 4945." Monthly Notices of the Royal Astronomical Society 423 (4): 3360-3396 [10.1111/j.1365-2966.2012.21129.x]

    Yaqoob, T., K. D. Murphy, L. Miller, and T. J. Turner. 2010. "On the efficiency of production of the Fe Kα emission line in neutral matter." Monthly Notices of the Royal Astronomical Society 401 411 [Full Text (Link)] [10.1111/j.1365-2966.2009.15657.x]

    Yaqoob, T., K. D. Murphy, R. E. Griffiths, et al. Y. Haba, H. Inoue, T. Itoh, R. L. Kelley, M. Kokubun, A. G. Markowitz, R. F. Mushotzky, T. Okajima, A. F. Ptak, J. Reeves, P. J. Serlemitsos, T. Takahashi, and Y. Terashima. 2007. "Precision Fe Kα and Fe Kβ Line Spectroscopy of the Seyfert 19 Galaxy NGC 2992 with Suzaku." Publications of the Astronomical Society of Japan, Vol59, NoSP1, pp283-299 59 283 [Full Text (Link)]

    Murphy, K. D., T. Yaqoob, and Y. Terashima. 2007. "Monitoring the Violent Activity from the Inner Accretion Disk of the Seyfert 19 Galaxy NGC 2992 with RXTE." The Astrophysical Journal 666 96 [Full Text (Link)] [10.1086/520039]

    McKernan, B., T. Yaqoob, and C. S. Reynolds. 2007. "A soft X-ray study of type I active galactic nuclei observed with Chandra high-energy transmission grating spectrometer." Monthly Notices of the Royal Astronomical Society 379 1359 [Full Text (Link)] [10.1111/j.1365-2966.2007.11993.x]

    Yaqoob, T., and P. Serlemitsos. 2005. "Iron K Features in the Quasar E1821+643: Evidence for Gravitationally Redshifted Absorption?" The Astrophysical Journal 623 112 [Full Text (Link)] [10.1086/428432]

    Dovčiak, M., V. Karas, and T. Yaqoob. 2004. "An Extended Scheme for Fitting X-Ray Data with Accretion Disk Spectra in the Strong Gravity Regime." The Astrophysical Journal Supplement Series 153 205 [Full Text (Link)] [10.1086/421115]

    Yaqoob, T., and U. Padmanabhan. 2004. "The Cores of the Fe K Lines in Seyfert 1 Galaxies Observed by the Chandra High Energy Grating." The Astrophysical Journal 604 63 [Full Text (Link)] [10.1086/381731]

    Yaqoob, T., I. M. George, T. R. Kallman, et al. U. Padmanabhan, K. A. Weaver, and T. J. Turner. 2003. "Fe XXV and Fe XXVI Diagnostics of the Black Hole and Accretion Disk in Active Galaxies: Chandra Time-resolved Grating Spectroscopy of NGC 7314." The Astrophysical Journal 596 85 [Full Text (Link)] [10.1086/377687]

    Benlloch, S., J. Wilms, R. Edelson, T. Yaqoob, and R. Staubert. 2001. "Quasi-periodic Oscillation in Seyfert Galaxies: Significance Levels The Case of Markarian 766." The Astrophysical Journal 562 L121 [Full Text (Link)] [10.1086/338252]

                                                                                                                                                                                            
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