General
Yanjun Xu
Particle Astrophysics Division
Institute of High Energy Physics, Chinese Academy of Sciences
Email：xuyj@ihep.ac.cn
Research Areas
Observational X-ray Astronomy, Stellar-mass and Supermassive Black Holes, High Energy Astrophysics
Education
2015-09--2021-06 California Institute of Technology Ph.D., Physics
2011-09--2015-07 University of Science and Technology of China B.S., Astronomy
Experience
Work Experience
2022-09~ Institute of High Energy Physics, CAS Associate Researcher
2021-07~2022-06 California Institute of Technology Postdoctoral Research Associate
Publications
[1] Xu, Yanjun, Harrison, Fiona A, Tomsick, John A, Walton, Dominic J, Barret, Didier, Garcia, Javier A, Hare, Jeremy, Parker, Michael L. Studying the Reflection Spectra of the New Black Hole X-Ray Binary Candidate MAXI J1631-479 Observed by NuSTAR: A Variable Broad Iron Line Profile. ASTROPHYSICAL JOURNAL[J]. 2020, 893(1): http://dx.doi.org/10.3847/1538-4357/ab7dc0.
[2] Brightman, Murray, Walton, Dominic J, Xu, Yanjun, Earnshaw, Hannah P, Harrison, Fiona A, Stern, Daniel, Barret, Didier. Spectral Evolution of the Ultraluminous X-Ray Sources M82 X-1 and X-2. ASTROPHYSICAL JOURNAL[J]. 2020, 889(1): http://dx.doi.org/10.3847/1538-4357/ab629a.
[3] Xu, Yanjun, Harrison, Fiona A, Tomsick, John A, Hare, Jeremy, Fabian, Andrew C, Walton, Dominic J. Evidence for Disk Truncation at Low Accretion States of the Black Hole Binary MAXI J1820+070 Observed by NuSTAR and XMM-Newton. ASTROPHYSICAL JOURNAL[J]. 2020, 893(1): http://dx.doi.org/10.3847/1538-4357/ab7cdb.
[4] Hare, Jeremy, Tomsick, John A, Buisson, Douglas J K, Clavel, Maica, Gandhi, Poshak, Garcia, Javier A, Grefenstette, Brian W, Walton, Dominic J, Xu, Yanjun. NuSTAR Observations of the Transient Galactic Black Hole Binary Candidate Swift J1858.6-0814: A New Sibling of V404 Cyg and V4641 Sgr?. ASTROPHYSICALJOURNAL[J]. 2020, 890(1): https://www.webofscience.com/wos/woscc/full-record/WOS:000522095800057.
[5] Garcia, Javier A, Tomsick, John A, Sridhar, Navin, Grinberg, Victoria, Connors, Riley M T, Wang, Jingyi, Steiner, James F, Dauser, Thomas, Walton, Dominic J, Xu, Yanjun, Harrison, Fiona A, Foster, Karl, Grefenstette, Brian, Madsen, Kristin, Fabian, Andrew. The 2017 Failed Outburst of GX 339?4: Relativistic X-Ray Reflection near the Black Hole Revealed by NuSTAR and Swift Spectroscopy. ASTROPHYSICAL JOURNAL[J]. 2019, 885(1): https://www.webofscience.com/wos/woscc/full-record/WOS:000498546800018.
[6] Xu, Yanjun, Harrison, Fiona A, Tomsick, John A, Barret, Didier, Gandhi, Poshak, Garcia, Javier A, Miller, Jon M, Uttley, Phil, Walton, Dominic J. Broadband X-Ray Spectral and Timing Analyses of the Black Hole Binary Candidate Swift J1658.2-4242: Rapid Flux Variation and the Turn-on of a Transient QPO. ASTROPHYSICAL JOURNAL[J]. 2019, 879(2): http://dx.doi.org/10.3847/1538-4357/ab24bf.
[7] Brightman, Murray, Harrison, Fiona A, Bachetti, Matteo, Xu, Yanjun, Furst, Felix, Walton, Dominic J, Ptak, Andrew, Yukita, Mihoko, Zezas, Andreas. A similar to 60 day Super-orbital Period Originating from the Ultraluminous X-Ray Pulsar in M82. ASTROPHYSICAL JOURNAL[J]. 2019, 873(2): https://www.webofscience.com/wos/woscc/full-record/WOS:000460963800013.
[8] Xu, Yanjun, Harrison, Fiona A, Kennea, Jamie A, Walton, Dominic J, Tomsick, John A, Miller, Jon M, Barret, Didier, Fabian, Andrew C, Forster, Karl, Furst, Felix, Gandhi, Poshak, Garcia, Javier A. The Hard State of the Highly Absorbed High Inclination Black Hole Binary Candidate Swift J1658.2-4242 Observed by NuSTAR and Swift. ASTROPHYSICAL JOURNAL[J]. 2018, 865(1): http://dx.doi.org/10.3847/1538-4357/aada03.
[9] Xu, Yanjun, Harrison, Fiona A, Garcia, Javier A, Fabian, Andrew C, Furst, Felix, Gandhi, Poshak, Grefenstette, Brian W, Madsen, Kristin K, Miller, Jon M, Parker, Michael L, Tomsick, John A, Walton, Dominic J. Reflection Spectra of the Black Hole Binary Candidate MAXI J1535-571 in the Hard State Observed by NuSTAR. ASTROPHYSICAL JOURNAL LETTERS[J]. 2018, 852(2): https://www.webofscience.com/wos/woscc/full-record/WOS:000422737500004.
[10] Kasliwal, M M, Nakar, E, Singer, L P, Kaplan, D L, Cook, D O, Van Sistine, A, Lau, R M, Fremling, C, Gottlieb, O, Jencson, J E, Adams, S M, Feindt, U, Hotokezaka, K, Ghosh, S, Perley, D A, Yu, PC, Piran, T, Allison, J R, Anupama, G C, Balasubramanian, A, WBannister, K, Bally, J, Barnes, J, Barway, S, Bellm, E, Bhalerao, V, Bhattacharya, D, Blagorodnova, N, Bloom, J S, Brady, P R, Cannella, C, Chatterjee, D, Cenko, S B, Cobb, B E, Copperwheat, C, Corsi, A, De, K, Dobie, D, Emery, S W K, Evans, P A, Fox, O D, Frail, D A, Frohmaier, C, Goobar, A, Hallinan, G, Harrison, F, Helou, G, Hinderer, T, Ho, A Y Q, Horesh, A, Ip, WH, Itoh, R, Kasen, D, Kim, H, Kuin, N P M, Kupfer, T, Lynch, C, Madsen, K, Mazzali, P A, Miller, A A, Mooley, K, Murphy, T, Ngeow, CC, Nichols, D, Nissanke, S, Nugent, P, Ofek, E O, Qi, H, Quimby, R M, Rosswog, S, Rusu, F, Sadler, E M, Schmidt, P, Sollerman, J, Steele, I, Williamson, A R, Xu, Y, Yan, L, Yatsu, Y, Zhang, C, Zhao, W. Illuminating gravitational waves: A concordant picture of photons from a neutron star merger. SCIENCE[J]. 2017, 358(6370): 1559-+, https://www.webofscience.com/wos/woscc/full-record/WOS:000418448000051.
[11] Evans, P A, Cenko, S B, Kennea, J A, Emery, S W K, Kuin, N P M, Korobkin, O, Wollaeger, R T, Fryer, C L, Madsen, K K, Harrison, F A, Xu, Y, Nakar, E, Hotokezaka, K, Lien, A, Campana, S, Oates, S R, Troja, E, Breeveld, A A, Marshall, F E, Barthelmy, S D, Beardmore, A P, Burrows, D N, Cusumano, G, DAi, A, DAvanzo, P, DElia, V, De Pasquale, M, Even, W P, Fontes, C J, Forster, K, Garcia, J, Giommi, P, Grefenstette, B, Gronwall, C, Hartmann, D H, Heida, M, Hungerford, A L, Kasliwal, M M, Krimm, H A, Levan, A J, Malesani, D, Melandri, A, Miyasaka, H, Nousek, J A, OBrien, P T, Osborne, J P, Pagani, C, Page, K L, Palmer, D M, Perri, M, Pike, S, Racusin, J L, Rosswog, S, Siegel, M H, Sakamoto, T, Sbarufatti, B, Tagliaferri, G, Tanvir, N R, Tohuvavohu, A. Swift and NuSTAR observations of GW170817: Detection of a blue kilonova. SCIENCE[J]. 2017, 358(6370): 1565-1569, https://www.webofscience.com/wos/woscc/full-record/WOS:000418448000052.
[12] Xu, Yanjun, Balokovic, Mislav, Walton, Dominic J, Harrison, Fiona A, Garcia, Javier A, Koss, Michael J. Evidence for Relativistic Disk Reflection in the Seyfert 1h Galaxy/ULIRG IRAS 05189-2524 Observed by NuSTAR and XMM-Newton. ASTROPHYSICAL JOURNAL[J]. 2017, 837(1): https://www.webofscience.com/wos/woscc/full-record/WOS:000401170800006.
[13] Xu, Yanjun, Garcia, Javier A, Furst, Felix, Harrison, Fiona A, Walton, Dominic J, Tomsick, John A, Bachetti, Matteo, King, Ashley L, Madsen, Kristin K, Miller, Jon M, Grinberg, Victoria. Spectral and Timing Properties of IGR J17091-3624 in the Rising Hard State During Its 2016 Outburst. ASTROPHYSICAL JOURNAL[J]. 2017, 851(2): http://dx.doi.org/10.3847/1538-4357/aa9ab4.
[14] Zhu, X J, Wen, L, Xiong, J, Xu, Y, Wang, Y, Mohanty, S D, Hobbs, G, Manchester, R N. Detection and localization of continuous gravitational waves with pulsar timing arrays: the role of pulsar terms. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY[J]. 2016, 461(2): 1317-1327, https://www.webofscience.com/wos/woscc/full-record/WOS:000383273600012.
[15] LIGO Scientific Collaboration, Virgo Collaboration, GBM, Fermi, INTEGRAL, Collaboration, IceCube, Team, AstroSat Cadmium Zinc Telluride Imager, Collaboration, IPN, Collaboration, The Insight-Hxmt, Collaboration, ANTARES, Collaboration, The Swift, Team, AGILE, Team, The 1M2H, Collaboration, The Dark Energy Camera GW-EM, Collaboration, the DES, Collaboration, The DLT40, GRAWITA, :, TeAm, GRAvitational Wave Inaf, Collaboration, The Fermi Large Area Telescope, ATCA, :, Array, Australia Telescope Compact, ASKAP, :, Pathfinder, Australian SKA, Group, Las Cumbres Observatory, OzGrav, DWF, AST3, Collaborations, CAASTRO, Collaboration, The VINROUGE, Collaboration, MASTER, J-GEM, GROWTH, JAGWAR, NRAO, Caltech-, TTU-NRAO, Collaborations, NuSTAR, Pan-STARRS, Team, The MAXI, Consortium, TZAC, Collaboration, KU, Telescope, Nordic Optical, ePESSTO, GROND, University, Texas Tech, Group, SALT, TOROS, :, Collaboration, Transient Robotic Observatory of the South, Collaboration, The BOOTES, MWA, :, Array, Murchison Widefield, Collaboration, The CALET, Collaboration, IKI-GW Follow-up, Collaboration, H. E. S. S., Collaboration, LOFAR, LWA, :, Array, Long Wavelength, Collaboration, HAWC, Collaboration, The Pierre Auger, Collaboration, ALMA, Team, Euro VLBI, Collaboration, Pi of the Sky, University, The Chandra Team at McGill, DFN, :, Network, Desert Fireball, ATLAS, Survey, High Time Resolution Universe, RIMAS, RATIR, Africa/MeerKAT, SKA South. Multi-messenger Observations of a Binary Neutron Star Merger. http://arxiv.org/abs/1710.05833.
[2] Brightman, Murray, Walton, Dominic J, Xu, Yanjun, Earnshaw, Hannah P, Harrison, Fiona A, Stern, Daniel, Barret, Didier. Spectral Evolution of the Ultraluminous X-Ray Sources M82 X-1 and X-2. ASTROPHYSICAL JOURNAL[J]. 2020, 889(1): http://dx.doi.org/10.3847/1538-4357/ab629a.
[3] Xu, Yanjun, Harrison, Fiona A, Tomsick, John A, Hare, Jeremy, Fabian, Andrew C, Walton, Dominic J. Evidence for Disk Truncation at Low Accretion States of the Black Hole Binary MAXI J1820+070 Observed by NuSTAR and XMM-Newton. ASTROPHYSICAL JOURNAL[J]. 2020, 893(1): http://dx.doi.org/10.3847/1538-4357/ab7cdb.
[4] Hare, Jeremy, Tomsick, John A, Buisson, Douglas J K, Clavel, Maica, Gandhi, Poshak, Garcia, Javier A, Grefenstette, Brian W, Walton, Dominic J, Xu, Yanjun. NuSTAR Observations of the Transient Galactic Black Hole Binary Candidate Swift J1858.6-0814: A New Sibling of V404 Cyg and V4641 Sgr?. ASTROPHYSICALJOURNAL[J]. 2020, 890(1): https://www.webofscience.com/wos/woscc/full-record/WOS:000522095800057.
[5] Garcia, Javier A, Tomsick, John A, Sridhar, Navin, Grinberg, Victoria, Connors, Riley M T, Wang, Jingyi, Steiner, James F, Dauser, Thomas, Walton, Dominic J, Xu, Yanjun, Harrison, Fiona A, Foster, Karl, Grefenstette, Brian, Madsen, Kristin, Fabian, Andrew. The 2017 Failed Outburst of GX 339?4: Relativistic X-Ray Reflection near the Black Hole Revealed by NuSTAR and Swift Spectroscopy. ASTROPHYSICAL JOURNAL[J]. 2019, 885(1): https://www.webofscience.com/wos/woscc/full-record/WOS:000498546800018.
[6] Xu, Yanjun, Harrison, Fiona A, Tomsick, John A, Barret, Didier, Gandhi, Poshak, Garcia, Javier A, Miller, Jon M, Uttley, Phil, Walton, Dominic J. Broadband X-Ray Spectral and Timing Analyses of the Black Hole Binary Candidate Swift J1658.2-4242: Rapid Flux Variation and the Turn-on of a Transient QPO. ASTROPHYSICAL JOURNAL[J]. 2019, 879(2): http://dx.doi.org/10.3847/1538-4357/ab24bf.
[7] Brightman, Murray, Harrison, Fiona A, Bachetti, Matteo, Xu, Yanjun, Furst, Felix, Walton, Dominic J, Ptak, Andrew, Yukita, Mihoko, Zezas, Andreas. A similar to 60 day Super-orbital Period Originating from the Ultraluminous X-Ray Pulsar in M82. ASTROPHYSICAL JOURNAL[J]. 2019, 873(2): https://www.webofscience.com/wos/woscc/full-record/WOS:000460963800013.
[8] Xu, Yanjun, Harrison, Fiona A, Kennea, Jamie A, Walton, Dominic J, Tomsick, John A, Miller, Jon M, Barret, Didier, Fabian, Andrew C, Forster, Karl, Furst, Felix, Gandhi, Poshak, Garcia, Javier A. The Hard State of the Highly Absorbed High Inclination Black Hole Binary Candidate Swift J1658.2-4242 Observed by NuSTAR and Swift. ASTROPHYSICAL JOURNAL[J]. 2018, 865(1): http://dx.doi.org/10.3847/1538-4357/aada03.
[9] Xu, Yanjun, Harrison, Fiona A, Garcia, Javier A, Fabian, Andrew C, Furst, Felix, Gandhi, Poshak, Grefenstette, Brian W, Madsen, Kristin K, Miller, Jon M, Parker, Michael L, Tomsick, John A, Walton, Dominic J. Reflection Spectra of the Black Hole Binary Candidate MAXI J1535-571 in the Hard State Observed by NuSTAR. ASTROPHYSICAL JOURNAL LETTERS[J]. 2018, 852(2): https://www.webofscience.com/wos/woscc/full-record/WOS:000422737500004.
[10] Kasliwal, M M, Nakar, E, Singer, L P, Kaplan, D L, Cook, D O, Van Sistine, A, Lau, R M, Fremling, C, Gottlieb, O, Jencson, J E, Adams, S M, Feindt, U, Hotokezaka, K, Ghosh, S, Perley, D A, Yu, PC, Piran, T, Allison, J R, Anupama, G C, Balasubramanian, A, WBannister, K, Bally, J, Barnes, J, Barway, S, Bellm, E, Bhalerao, V, Bhattacharya, D, Blagorodnova, N, Bloom, J S, Brady, P R, Cannella, C, Chatterjee, D, Cenko, S B, Cobb, B E, Copperwheat, C, Corsi, A, De, K, Dobie, D, Emery, S W K, Evans, P A, Fox, O D, Frail, D A, Frohmaier, C, Goobar, A, Hallinan, G, Harrison, F, Helou, G, Hinderer, T, Ho, A Y Q, Horesh, A, Ip, WH, Itoh, R, Kasen, D, Kim, H, Kuin, N P M, Kupfer, T, Lynch, C, Madsen, K, Mazzali, P A, Miller, A A, Mooley, K, Murphy, T, Ngeow, CC, Nichols, D, Nissanke, S, Nugent, P, Ofek, E O, Qi, H, Quimby, R M, Rosswog, S, Rusu, F, Sadler, E M, Schmidt, P, Sollerman, J, Steele, I, Williamson, A R, Xu, Y, Yan, L, Yatsu, Y, Zhang, C, Zhao, W. Illuminating gravitational waves: A concordant picture of photons from a neutron star merger. SCIENCE[J]. 2017, 358(6370): 1559-+, https://www.webofscience.com/wos/woscc/full-record/WOS:000418448000051.
[11] Evans, P A, Cenko, S B, Kennea, J A, Emery, S W K, Kuin, N P M, Korobkin, O, Wollaeger, R T, Fryer, C L, Madsen, K K, Harrison, F A, Xu, Y, Nakar, E, Hotokezaka, K, Lien, A, Campana, S, Oates, S R, Troja, E, Breeveld, A A, Marshall, F E, Barthelmy, S D, Beardmore, A P, Burrows, D N, Cusumano, G, DAi, A, DAvanzo, P, DElia, V, De Pasquale, M, Even, W P, Fontes, C J, Forster, K, Garcia, J, Giommi, P, Grefenstette, B, Gronwall, C, Hartmann, D H, Heida, M, Hungerford, A L, Kasliwal, M M, Krimm, H A, Levan, A J, Malesani, D, Melandri, A, Miyasaka, H, Nousek, J A, OBrien, P T, Osborne, J P, Pagani, C, Page, K L, Palmer, D M, Perri, M, Pike, S, Racusin, J L, Rosswog, S, Siegel, M H, Sakamoto, T, Sbarufatti, B, Tagliaferri, G, Tanvir, N R, Tohuvavohu, A. Swift and NuSTAR observations of GW170817: Detection of a blue kilonova. SCIENCE[J]. 2017, 358(6370): 1565-1569, https://www.webofscience.com/wos/woscc/full-record/WOS:000418448000052.
[12] Xu, Yanjun, Balokovic, Mislav, Walton, Dominic J, Harrison, Fiona A, Garcia, Javier A, Koss, Michael J. Evidence for Relativistic Disk Reflection in the Seyfert 1h Galaxy/ULIRG IRAS 05189-2524 Observed by NuSTAR and XMM-Newton. ASTROPHYSICAL JOURNAL[J]. 2017, 837(1): https://www.webofscience.com/wos/woscc/full-record/WOS:000401170800006.
[13] Xu, Yanjun, Garcia, Javier A, Furst, Felix, Harrison, Fiona A, Walton, Dominic J, Tomsick, John A, Bachetti, Matteo, King, Ashley L, Madsen, Kristin K, Miller, Jon M, Grinberg, Victoria. Spectral and Timing Properties of IGR J17091-3624 in the Rising Hard State During Its 2016 Outburst. ASTROPHYSICAL JOURNAL[J]. 2017, 851(2): http://dx.doi.org/10.3847/1538-4357/aa9ab4.
[14] Zhu, X J, Wen, L, Xiong, J, Xu, Y, Wang, Y, Mohanty, S D, Hobbs, G, Manchester, R N. Detection and localization of continuous gravitational waves with pulsar timing arrays: the role of pulsar terms. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY[J]. 2016, 461(2): 1317-1327, https://www.webofscience.com/wos/woscc/full-record/WOS:000383273600012.
[15] LIGO Scientific Collaboration, Virgo Collaboration, GBM, Fermi, INTEGRAL, Collaboration, IceCube, Team, AstroSat Cadmium Zinc Telluride Imager, Collaboration, IPN, Collaboration, The Insight-Hxmt, Collaboration, ANTARES, Collaboration, The Swift, Team, AGILE, Team, The 1M2H, Collaboration, The Dark Energy Camera GW-EM, Collaboration, the DES, Collaboration, The DLT40, GRAWITA, :, TeAm, GRAvitational Wave Inaf, Collaboration, The Fermi Large Area Telescope, ATCA, :, Array, Australia Telescope Compact, ASKAP, :, Pathfinder, Australian SKA, Group, Las Cumbres Observatory, OzGrav, DWF, AST3, Collaborations, CAASTRO, Collaboration, The VINROUGE, Collaboration, MASTER, J-GEM, GROWTH, JAGWAR, NRAO, Caltech-, TTU-NRAO, Collaborations, NuSTAR, Pan-STARRS, Team, The MAXI, Consortium, TZAC, Collaboration, KU, Telescope, Nordic Optical, ePESSTO, GROND, University, Texas Tech, Group, SALT, TOROS, :, Collaboration, Transient Robotic Observatory of the South, Collaboration, The BOOTES, MWA, :, Array, Murchison Widefield, Collaboration, The CALET, Collaboration, IKI-GW Follow-up, Collaboration, H. E. S. S., Collaboration, LOFAR, LWA, :, Array, Long Wavelength, Collaboration, HAWC, Collaboration, The Pierre Auger, Collaboration, ALMA, Team, Euro VLBI, Collaboration, Pi of the Sky, University, The Chandra Team at McGill, DFN, :, Network, Desert Fireball, ATLAS, Survey, High Time Resolution Universe, RIMAS, RATIR, Africa/MeerKAT, SKA South. Multi-messenger Observations of a Binary Neutron Star Merger. http://arxiv.org/abs/1710.05833.