Eleonora Troja

Eleonora Troja

  • 301.286.0941
  • NASA/GSFC
  • Mail Code: 662
  • Greenbelt , MD 20771
  • Employer: UNIV OF MARYLAND COLLEGE PARK
  • Research Interests

    High Energy Astrophysics

    Gamma-Ray Bursts

    Electromagnetic Counterparts of Gravitational Waves

    My research interests lie in the field of time domain astronomy, and include the study of gamma-ray bursts (GRBs) and exotic transients such as kilonovae and tidal disruption events. In my career I worked on a variety of different aspects of the GRB phenomenon, although my primary focus is the connection between short duration GRBs, neutron star mergers, and gravitational wave sources.

    My main interest is to investigate the observational signatures of compact binary mergers, that is, binary systems composed by either two neutron stars (NS-NS) or a neutron star and a black hole (NS-BH) which slowly spiral into each other and eventually collide due to energy losses to gravitational radiation. Compact binary mergers lie at the intersection of several key aspects of modern astrophysics:

    • they are the most likely cause of short duration gamma-ray bursts;
    • they are strong sources of gravitational wave radiation, and prime candidates for direct detection with advanced LIGO and Virgo;
    • they are the most promising r-process sites for the formation of all the heavy elements (i.e. gold, platinum, uranium, …) found on Earth.

    These three fundamental areas of investigation are at the core of my research.

    Personal Websitehttps://eleonoratroja.wordpress.com

    Positions/Employment

    7/2015 - Present

    Assistant Research Scientist

    University of Maryland - College Park, NASA Goddarrd Space Flight Center  
    7/2013 - Present

    Swift Guest Investigator Program Lead

    , NASA Goddard Space Flight Center  
    7/2012 - 7/2013

    Research Associate

    University of Maryland College Park, NASA Goddard Space Flight Center  
    7/2009 - 7/2012

    NASA Postdoctoral Program Fellow

    Advisor: Neil Gehrels, NASA Goddard Space Flight Center

    Education

    PhD in Physics & Astronomy,  03/2009
    Thesis: Gamma-ray bursts in the Swift era: evidence of long lived central engines and implications for progenitor models.
    Supervisor: Dr. Giancarlo Cusumano (INAF-IASF Palermo).

    Master's degree in Physics & Astronomy, 07/2005
                                                 
    Thesis: XMM-Newton observations of the supernova remnant IC 443: analysis of the thermal X-ray emission.
    Supervisor: Prof. F. Reale (OAPA - Astronomical Observatory of Palermo)

    Bachelor's degree in Physics & Astronomy, 09/2002
                                  
    Thesis: X-ray spectroscopy of He-like ions in optically thin astrophysical plasmas.
    Supervisor: Prof. G. Peres (OAPA - Astronomical Observatory of Palermo)

    Teaching Experience

     Lecturer - University of Maryland College Park  (ASTR 288C)

    Selected Publications

    Refereed

    Golkhou, V., N. Butler, R. Strausbaugh, et al. E. Troja, A. Kutyrev, W. Lee, C. Rom'an-Z'u~niga, and A. Watson. 2017. "RATIR Followup of LIGO/Virgo Gravitational Wave Events." ArXiv e-prints, (Submitted)

    Troja, E., V. Lipunov, C. Mundell, et al. N. Butler, A. Watson, S. Kobayashi, S. Cenko, F. Marshall, R. Ricci, A. Fruchter, M. Wieringa, E. Gorbovskoy, V. Kornilov, A. Kutyrev, W. Lee, V. Toy, N. Tyurina, N. Budnev, D. Buckley, J. Gonz'alez, O. Gress, A. Horesh, M. Panasyuk, J. Prochaska, E. Ramirez-Ruiz, R. Rebolo Lopez, M. Richer, C. Roman-Zuniga, M. Serra-Ricart, V. Yurkov, and N. Gehrels. 2017. "Significant and variable linear polarization during the prompt optical flash of GRB 160625B.." Nature, 547: 425-427 [10.1038/nature23289]

    Troja, E., A. Read, A. Tiengo, and R. Salvaterra. 2016. "XMM-Newton Slew Survey Observations of the Gravitational Wave Event GW150914." Astrophysical Journal Letters, 822: L8 [10.3847/2041-8205/822/1/L8]

    Abbott, B., R. Abbott, T. Abbott, et al. M. Abernathy, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. Adhikari, and E. al.. 2016. "Localization and Broadband Follow-up of the Gravitational-wave Transient GW150914." Astrophysical Journal Letters, 826: L13 [10.3847/2041-8205/826/1/L13]

    Troja, E., T. Sakamoto, S. Cenko, et al. A. Lien, N. Gehrels, A. Castro-Tirado, R. Ricci, J. Capone, V. Toy, A. Kutyrev, N. Kawai, A. Cucchiara, A. Fruchter, J. Gorosabel, S. Jeong, A. Levan, D. Perley, R. Sanchez-Ramirez, N. Tanvir, and S. Veilleux. 2016. "An Achromatic Break in the Afterglow of the Short GRB 140903A: Evidence for a Narrow Jet." The Astrophysical Journal, 827: 102 [10.3847/0004-637X/827/2/102]

    Evans, P., J. Kennea, D. Palmer, et al. M. Bilicki, J. Osborne, P. O'Brien, N. Tanvir, A. Lien, S. Barthelmy, D. Burrows, S. Campana, S. Cenko, V. D'Elia, N. Gehrels, F. Marshall, K. Page, M. Perri, B. Sbarufatti, M. Siegel, G. Tagliaferri, and E. Troja. 2016. "Swift follow-up of gravitational wave triggers: results from the first aLIGO run and optimization for the future." Monthly Notices of the Royal Astronomical Society, 462: 1591-1602 [10.1093/mnras/stw1746]

    Troja, E., L. Piro, V. Vasileiou, et al. N. Omodei, J. Burgess, S. Cutini, V. Connaughton, and J. McEnery. 2015. "Swift and Fermi Observations of X-Ray Flares: The Case of Late Internal Shock." The Astrophysical Journal, 803: 10 [10.1088/0004-637X/803/1/10]

    Zhang, B.-B., H. van Eerten, D. Burrows, et al. G. Ryan, P. Evans, J. Racusin, E. Troja, and A. MacFadyen. 2015. "An Analysis of Chandra Deep Follow-up Gamma-Ray Bursts: Implications for Off-axis Jets." The Astrophysical Journal, 806: 15 [10.1088/0004-637X/806/1/15]

    Troja, E., A. Segreto, V. La Parola, et al. D. Hartmann, W. Baumgartner, C. Markwardt, S. Barthelmy, G. Cusumano, and N. Gehrels. 2014. "Swift/BAT Detection of Hard X-Rays from Tycho's Supernova Remnant: Evidence for Titanium-44." Astrophysical Journal Letters, 797: L6 [10.1088/2041-8205/797/1/L6]

    Sakamoto, T., E. Troja, K. Aoki, S. G. Guiriec, and Et al.. 2013. "Identifying the Location in the Host Galaxy of Short GRB 111117A with the Chandra Sub-arcsecond Position." The Astrophysical Journal, 766 (1): http://adsabsharvardedu/abs/2012arXiv12056774S, 12 [10.1088/0004-637X/766/1/41]

    Troja, E., T. Sakamoto, C. Guidorzi, et al. J. P. Norris, A. Panaitescu, S. Kobayashi, N. Omodei, and Et al.. 2012. "Broadband study of GRB 091127: a sub-energetic burst at higher redshift?" The Astrophysical Journal, http://arxivorg/abs/12014181: [Full Text (Link)] [ 10.1088/0004-637X/761/1/50]

    Cannizzo, J. K., E. Troja, and C. A. Gehrels. 2011. "Fall-back Disks in Long and Short Gamma-Ray Bursts." The Astrophysical Journal, [10.1088/0004-637X/734/1/35]

    Cannizzo, J. K., E. Troja, and G. Lodato. 2011. "GRB 110328A/Swift J1644493+573451: The Tidal Obliteration of a Deeply Plunging Star?" The Astrophysical Journal, 742 (1): 32 [Full Text (Link)] [10.1088/0004-637X/742/1/32]

    Virgili, F., B. Zhang, P. T. O'Brien, and E. Troja. 2011. "Are All Short-hard Gamma-ray Bursts Produced from Mergers of Compact Stellar Objects?" The Astrophysical Journal, 727 (2): [10.1088/0004-637X/727/2/109]

    Lyons, N., P. T. O'Brien, B. Zhang, et al. R. Willingale, E. Troja, and R. Starling. 2010. "Can X-ray emission powered by a spinning-down magnetar explain some gamma-ray burst light-curve features?" Monthly Notices of the Royal Astronomical Society, 402 (2): 705-712 [10.1111/j.1365-2966.2009.15538.x]

    Troja, E., S. Rosswog, and C. A. Gehrels. 2010. "Precursors of Short Gamma-ray Bursts." The Astrophysical Journal, 723 (2): 1711-1717 [10.1088/0004-637X/723/2/1711]

    Troja, E., F. Bocchino, M. Miceli, and F. Reale. 2008. "XMM-Newton observations of the supernova remnant IC 443. II. Evidence of stellar ejecta in the inner regions." Astronomy and Astrophysics, [10.1051/0004-6361:20079123]

    Troja, E., A. R. King, P. T. O'Brien, N. Lyons, and G. Cusumano. 2008. "Different progenitors of short hard gamma-ray bursts." Monthly Notices of the Royal Astronomical Society: Letters, 385 (1): L10-L14 [Full Text (Link)] [10.1111/j.1745-3933.2007.00421.x]

    Ruiz-Velasco, A. E., H. Swan, E. Troja, et al. D. Malesani, J. P. Fynbo, R. L. Starling, D. Xu, F. Aharonian, C. Akerlof, M. I. Andersen, M. C. Ashley, S. D. Barthelmy, D. Bersier, J. M. Castro Cerón, A. J. Castro-Tirado, N. Gehrels, E. Göğüş, J. Gorosabel, C. Guidorzi, T. Güver, J. Hjorth, D. Horns, K. Y. Huang, P. Jakobsson, B. L. Jensen, Ü. Kızıloğlu, C. Kouveliotou, H. A. Krimm, C. Ledoux, A. J. Levan, T. Marsh, T. McKay, A. Melandri, B. Milvang-Jensen, C. G. Mundell, P. T. O'Brien, M. Özel, A. Phillips, R. Quimby, G. Rowell, W. Rujopakarn, E. S. Rykoff, B. E. Schaefer, J. Sollerman, N. R. Tanvir, C. C. Thöne, Y. Urata, W. T. Vestrand, P. M. Vreeswijk, D. Watson, J. C. Wheeler, R. A. Wijers, J. Wren, S. A. Yost, F. Yuan, M. Zhai, and W. K. Zheng. 2007. "Detection of GRB 060927 at z = 5.47: Implications for the Use of Gamma‐Ray Bursts as Probes of the End of the Dark Ages." The Astrophysical Journal, 669 (1): 1-9 [10.1086/521546]

    Troja, E., G. Cusumano, P. T. O'Brien, et al. B. Zhang, B. Sbarufatti, V. Mangano, R. Willingale, G. Chincarini, J. P. Osborne, F. E. Marshall, D. N. Burrows, S. Campana, N. Gehrels, C. Guidorzi, H. A. Krimm, V. La Parola, E. W. Liang, T. Mineo, A. Moretti, K. L. Page, P. Romano, G. Tagliaferri, B. B. Zhang, M. J. Page, and P. Schady. 2007. "Swift Observations of GRB 070110: An Extraordinary X‐Ray Afterglow Powered by the Central Engine." The Astrophysical Journal, 665 (1): 599-607 [10.1086/519450]

    Troja, E., F. Bocchino, and F. Reale. 2006. "XMM-Newton Observations of the Supernova Remnant IC 443. I. Soft X-Ray Emission from Shocked Interstellar Medium." The Astrophysical Journal, [10.1086/506378]

    Selected Publications

    Refereed

    Golkhou, V., N. Butler, R. Strausbaugh, et al. E. Troja, A. Kutyrev, W. Lee, C. Rom'an-Z'u~niga, and A. Watson. 2017. "RATIR Followup of LIGO/Virgo Gravitational Wave Events." ArXiv e-prints (Submitted)

    Troja, E., V. Lipunov, C. Mundell, et al. N. Butler, A. Watson, S. Kobayashi, S. Cenko, F. Marshall, R. Ricci, A. Fruchter, M. Wieringa, E. Gorbovskoy, V. Kornilov, A. Kutyrev, W. Lee, V. Toy, N. Tyurina, N. Budnev, D. Buckley, J. Gonz'alez, O. Gress, A. Horesh, M. Panasyuk, J. Prochaska, E. Ramirez-Ruiz, R. Rebolo Lopez, M. Richer, C. Roman-Zuniga, M. Serra-Ricart, V. Yurkov, and N. Gehrels. 2017. "Significant and variable linear polarization during the prompt optical flash of GRB 160625B.." Nature 547 425-427 [10.1038/nature23289]

    Troja, E., A. Read, A. Tiengo, and R. Salvaterra. 2016. "XMM-Newton Slew Survey Observations of the Gravitational Wave Event GW150914." Astrophysical Journal Letters 822 L8 [10.3847/2041-8205/822/1/L8]

    Abbott, B., R. Abbott, T. Abbott, et al. M. Abernathy, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. Adhikari, and E. al.. 2016. "Localization and Broadband Follow-up of the Gravitational-wave Transient GW150914." Astrophysical Journal Letters 826 L13 [10.3847/2041-8205/826/1/L13]

    Troja, E., T. Sakamoto, S. Cenko, et al. A. Lien, N. Gehrels, A. Castro-Tirado, R. Ricci, J. Capone, V. Toy, A. Kutyrev, N. Kawai, A. Cucchiara, A. Fruchter, J. Gorosabel, S. Jeong, A. Levan, D. Perley, R. Sanchez-Ramirez, N. Tanvir, and S. Veilleux. 2016. "An Achromatic Break in the Afterglow of the Short GRB 140903A: Evidence for a Narrow Jet." The Astrophysical Journal 827 102 [10.3847/0004-637X/827/2/102]

    Evans, P., J. Kennea, D. Palmer, et al. M. Bilicki, J. Osborne, P. O'Brien, N. Tanvir, A. Lien, S. Barthelmy, D. Burrows, S. Campana, S. Cenko, V. D'Elia, N. Gehrels, F. Marshall, K. Page, M. Perri, B. Sbarufatti, M. Siegel, G. Tagliaferri, and E. Troja. 2016. "Swift follow-up of gravitational wave triggers: results from the first aLIGO run and optimization for the future." Monthly Notices of the Royal Astronomical Society 462 1591-1602 [10.1093/mnras/stw1746]

    Troja, E., L. Piro, V. Vasileiou, et al. N. Omodei, J. Burgess, S. Cutini, V. Connaughton, and J. McEnery. 2015. "Swift and Fermi Observations of X-Ray Flares: The Case of Late Internal Shock." The Astrophysical Journal 803 10 [10.1088/0004-637X/803/1/10]

    Zhang, B.-B., H. van Eerten, D. Burrows, et al. G. Ryan, P. Evans, J. Racusin, E. Troja, and A. MacFadyen. 2015. "An Analysis of Chandra Deep Follow-up Gamma-Ray Bursts: Implications for Off-axis Jets." The Astrophysical Journal 806 15 [10.1088/0004-637X/806/1/15]

    Troja, E., A. Segreto, V. La Parola, et al. D. Hartmann, W. Baumgartner, C. Markwardt, S. Barthelmy, G. Cusumano, and N. Gehrels. 2014. "Swift/BAT Detection of Hard X-Rays from Tycho's Supernova Remnant: Evidence for Titanium-44." Astrophysical Journal Letters 797 L6 [10.1088/2041-8205/797/1/L6]

    Sakamoto, T., E. Troja, K. Aoki, S. G. Guiriec, and Et al.. 2013. "Identifying the Location in the Host Galaxy of Short GRB 111117A with the Chandra Sub-arcsecond Position." The Astrophysical Journal 766 (1): 12 [10.1088/0004-637X/766/1/41]

    Troja, E., T. Sakamoto, C. Guidorzi, et al. J. P. Norris, A. Panaitescu, S. Kobayashi, N. Omodei, and Et al.. 2012. "Broadband study of GRB 091127: a sub-energetic burst at higher redshift?" The Astrophysical Journal [Full Text (Link)] [ 10.1088/0004-637X/761/1/50]

    Cannizzo, J. K., E. Troja, and C. A. Gehrels. 2011. "Fall-back Disks in Long and Short Gamma-Ray Bursts." The Astrophysical Journal [10.1088/0004-637X/734/1/35]

    Cannizzo, J. K., E. Troja, and G. Lodato. 2011. "GRB 110328A/Swift J1644493+573451: The Tidal Obliteration of a Deeply Plunging Star?" The Astrophysical Journal 742 (1): 32 [Full Text (Link)] [10.1088/0004-637X/742/1/32]

    Virgili, F., B. Zhang, P. T. O'Brien, and E. Troja. 2011. "Are All Short-hard Gamma-ray Bursts Produced from Mergers of Compact Stellar Objects?" The Astrophysical Journal 727 (2): [10.1088/0004-637X/727/2/109]

    Lyons, N., P. T. O'Brien, B. Zhang, et al. R. Willingale, E. Troja, and R. Starling. 2010. "Can X-ray emission powered by a spinning-down magnetar explain some gamma-ray burst light-curve features?" Monthly Notices of the Royal Astronomical Society 402 (2): 705-712 [10.1111/j.1365-2966.2009.15538.x]

    Troja, E., S. Rosswog, and C. A. Gehrels. 2010. "Precursors of Short Gamma-ray Bursts." The Astrophysical Journal 723 (2): 1711-1717 [10.1088/0004-637X/723/2/1711]

    Troja, E., F. Bocchino, M. Miceli, and F. Reale. 2008. "XMM-Newton observations of the supernova remnant IC 443. II. Evidence of stellar ejecta in the inner regions." Astronomy and Astrophysics [10.1051/0004-6361:20079123]

    Troja, E., A. R. King, P. T. O'Brien, N. Lyons, and G. Cusumano. 2008. "Different progenitors of short hard gamma-ray bursts." Monthly Notices of the Royal Astronomical Society: Letters 385 (1): L10-L14 [Full Text (Link)] [10.1111/j.1745-3933.2007.00421.x]

    Ruiz-Velasco, A. E., H. Swan, E. Troja, et al. D. Malesani, J. P. Fynbo, R. L. Starling, D. Xu, F. Aharonian, C. Akerlof, M. I. Andersen, M. C. Ashley, S. D. Barthelmy, D. Bersier, J. M. Castro Cerón, A. J. Castro-Tirado, N. Gehrels, E. Göğüş, J. Gorosabel, C. Guidorzi, T. Güver, J. Hjorth, D. Horns, K. Y. Huang, P. Jakobsson, B. L. Jensen, Ü. Kızıloğlu, C. Kouveliotou, H. A. Krimm, C. Ledoux, A. J. Levan, T. Marsh, T. McKay, A. Melandri, B. Milvang-Jensen, C. G. Mundell, P. T. O'Brien, M. Özel, A. Phillips, R. Quimby, G. Rowell, W. Rujopakarn, E. S. Rykoff, B. E. Schaefer, J. Sollerman, N. R. Tanvir, C. C. Thöne, Y. Urata, W. T. Vestrand, P. M. Vreeswijk, D. Watson, J. C. Wheeler, R. A. Wijers, J. Wren, S. A. Yost, F. Yuan, M. Zhai, and W. K. Zheng. 2007. "Detection of GRB 060927 at z = 5.47: Implications for the Use of Gamma‐Ray Bursts as Probes of the End of the Dark Ages." The Astrophysical Journal 669 (1): 1-9 [10.1086/521546]

    Troja, E., G. Cusumano, P. T. O'Brien, et al. B. Zhang, B. Sbarufatti, V. Mangano, R. Willingale, G. Chincarini, J. P. Osborne, F. E. Marshall, D. N. Burrows, S. Campana, N. Gehrels, C. Guidorzi, H. A. Krimm, V. La Parola, E. W. Liang, T. Mineo, A. Moretti, K. L. Page, P. Romano, G. Tagliaferri, B. B. Zhang, M. J. Page, and P. Schady. 2007. "Swift Observations of GRB 070110: An Extraordinary X‐Ray Afterglow Powered by the Central Engine." The Astrophysical Journal 665 (1): 599-607 [10.1086/519450]

    Troja, E., F. Bocchino, and F. Reale. 2006. "XMM-Newton Observations of the Supernova Remnant IC 443. I. Soft X-Ray Emission from Shocked Interstellar Medium." The Astrophysical Journal [10.1086/506378]

                                                                                                                                                                                            
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