Research Output per year
Research Output
2020
Spectral energy distributions of candidate periodically variable quasars: Testing the binary black hole hypothesis
Guo, H., Liu, X., Tayyaba, Z. & Liao, W. T., Feb 1 2020, In : Monthly Notices of the Royal Astronomical Society. 492, 2, p. 2910-2923 14 p.Research output: Contribution to journal › Article
Understanding Broad Mg II Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-look Quasars
Guo, H., Shen, Y., He, Z., Wang, T., Liu, X., Wang, S., Sun, M., Yang, Q., Kong, M. & Sheng, Z., Jan 10 2020, In : Astrophysical Journal. 888, 2, 58.Research output: Contribution to journal › Article
Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA): Methodology and Initial Results with Gaia DR2
Hwang, H. C., Shen, Y., Zakamska, N. & Liu, X., Jan 10 2020, In : Astrophysical Journal. 888, 2, 73.Research output: Contribution to journal › Article
2019
Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-Ray Observations Unveil Obscured Double Nuclei
Hou, M., Liu, X., Guo, H., Li, Z., Shen, Y. & Green, P. J., Sep 1 2019, In : Astrophysical Journal. 882, 1, 41.Research output: Contribution to journal › Article
An Unusual Mid-infrared Flare in a Type 2 AGN: An Obscured Turning-on AGN or Tidal Disruption Event?
Yang, Q., Shen, Y., Liu, X., Wu, X. B., Jiang, L., Shangguan, J., Graham, M. J. & Yao, S., Nov 10 2019, In : Astrophysical Journal. 885, 2, 110.Research output: Contribution to journal › Article
A Trio of Massive Black Holes Caught in the Act of Merging
Liu, X., Hou, M., Li, Z., Nyland, K., Guo, H., Kong, M., Shen, Y., Wrobel, J. M. & Peng, S., Dec 10 2019, In : Astrophysical Journal. 887, 1, 90.Research output: Contribution to journal › Article
Constraining sub-parsec binary supermassive black holes in quasars with multi-epoch spectroscopy – III. Candidates from continued radial velocity tests
Guo, H., Liu, X., Shen, Y., Loeb, A., Monroe, T. & Prochaska, J. X., Jan 1 2019, In : Monthly Notices of the Royal Astronomical Society. 482, 3, p. 3288-3307 20 p.Research output: Contribution to journal › Article
Deblending and classifying astronomical sources with Mask R-CNN deep learning
Burke, C. J., Aleo, P. D., Chen, Y. C., Liu, X., Peterson, J. R., Sembroski, G. H. & Lin, J. Y. Y., Dec 1 2019, In : Monthly Notices of the Royal Astronomical Society. 490, 3, p. 3952-3965 14 p.Research output: Contribution to journal › Article
Discovery of an Mg II Changing-look Active Galactic Nucleus and Its Implications for a Unification Sequence of Changing-look Active Galactic Nuclei
Guo, H., Sun, M., Liu, X., Wang, T., Kong, M., Wang, S., Sheng, Z. & He, Z., Oct 1 2019, In : Astrophysical Journal Letters. 883, 2, L44.Research output: Contribution to journal › Article
Enabling real-time multi-messenger astrophysics discoveries with deep learning
Huerta, E. A., Allen, G., Andreoni, I., Antelis, J. M., Bachelet, E., Berriman, G. B., Bianco, F. B., Biswas, R., Carrasco kind, M., Chard, K., Cho, M., Cowperthwaite, P. S., Etienne, Z. B., Fishbach, M., Forster, F., George, D., Gibbs, T., Graham, M., Gropp, W., Gruendl, R. & 40 others, , Oct 1 2019, In : Nature Reviews Physics. 1, 10, p. 600-608 9 p.Research output: Contribution to journal › Article
Varstrometry for Off-nucleus and Dual Sub-Kpc AGN (VODKA): How Well Centered Are Low-z AGN?
Shen, Y., Hwang, H. C., Zakamska, N. & Liu, X., Nov 1 2019, In : Astrophysical Journal Letters. 885, 1, L4.Research output: Contribution to journal › Article
2018
A Candidate Tidal Disruption Event in a Quasar at z = 2.359 from Abundance Ratio Variability
Liu, X., Dittmann, A., Shen, Y. & Jiang, L., May 20 2018, In : The Astrophysical journal. 859, 1, p. 8Research output: Contribution to journal › Article
Hubble Space Telescope Wide Field Camera 3 Identifies an rp = 1 Kpc Dual Active Galactic Nucleus in the Minor Galaxy Merger SDSS J0924+0510 at z = 0.1495
Liu, X., Guo, H., Shen, Y., Greene, J. E. & Strauss, M. A., Jul 20 2018, In : The Astrophysical journal. 862, 1, p. 29Research output: Contribution to journal › Article
Pulsar timing constraints on the Fermi massive black hole binary blazar population
Holgado, A. M., Sesana, A., Sandrinelli, A., Covino, S., Treves, A., Liu, X. & Ricker, P. M., Nov 21 2018, In : Monthly Notices of the Royal Astronomical Society: Letters. 481, 1, p. L74-L78 5 p.Research output: Contribution to journal › Article
Very Long Baseline Array Imaging of Type-2 Seyferts with Double-peaked Narrow Emission Lines: Searches for Sub-kpc Dual AGNs and Jet-powered Outflows
Liu, X., Lazio, T. J. W., Shen, Y. & Strauss, M. A., Feb 20 2018, In : Astrophysical Journal. 854, 2, 169.Research output: Contribution to journal › Article
2017
PHL 6625: A Minor Merger-associated QSO Behind NGC 247
Tao, L., Feng, H., Shen, Y., Ho, L. C., Ge, J., Kaaret, P., Mao, S. & Liu, X., 2017, In : The Astrophysical journal. 841, 118Research output: Contribution to journal › Article
2016
A high fraction of double-peaked narrow emission lines in powerful active galactic nuclei
Lyu, Y. & Liu, X., Jan 1 2016, In : Monthly Notices of the Royal Astronomical Society. 463, 1, p. 1-14 14 p.Research output: Contribution to journal › Article
Chandra X-ray and hubble space telescope imaging of optically selected kiloparsec-scale binary active galactic nuclei. II. Host galaxy morphology and AGN activity
Shangguan, J., Liu, X., Ho, L. C., Shen, Y., Peng, C. Y., Greene, J. E. & Strauss, M. A., May 20 2016, In : Astrophysical Journal. 823, 1, 50.Research output: Contribution to journal › Article
2014
Constraining sub-parsec binary supermassive black holes in quasars with multi-epoch spectroscopy. II. the population with kinematically offset broad balmer emission lines
Liu, X., Shen, Y., Bian, F., Loeb, A. & Tremaine, S., Jul 10 2014, In : Astrophysical Journal. 789, 2, 140.Research output: Contribution to journal › Article
Gemini long-slit observations of luminous obscured quasars: Further evidence for an upper limit on the size of the narrow-line region
Hainline, K. N., Hickox, R. C., Greene, J. E., Myers, A. D., Zakamska, N. L., Liu, G. & Liu, X., May 20 2014, In : Astrophysical Journal. 787, 1, 65.Research output: Contribution to journal › Article
Relativistic redshifts in quasar broad lines
Tremaine, S., Shen, Y., Liu, X. & Loeb, A., Oct 10 2014, In : Astrophysical Journal. 794, 1, 49.Research output: Contribution to journal › Article
2013
Chandra X-ray and Hubble Space Telescope imaging of optically selected Kiloparsec-scale binary active galactic nuclei. I. Nature of the nuclear ionizing sources
Liu, X., Civano, F., Shen, Y., Green, P., Greene, J. E. & Strauss, M. A., Jan 10 2013, In : Astrophysical Journal. 762, 2, 110.Research output: Contribution to journal › Article
Constraining sub-parsec binary supermassive black holes in quasars with multi-epoch spectroscopy. I. the general quasar population
Shen, Y., Liu, X., Loeb, A. & Tremaine, S., Sep 20 2013, In : Astrophysical Journal. 775, 1, 49.Research output: Contribution to journal › Article
Observations of feedback from radio-quiet quasars - I. Extents and morphologies of ionized gas nebulae
Liu, G., Zakamska, N. L., Greene, J. E., Nesvadba, N. P. H. & Liu, X., May 2 2013, In : Monthly Notices of the Royal Astronomical Society. 430, 3, p. 2327-2345 19 p.Research output: Contribution to journal › Article
Observations of feedback from radio-quiet quasars - II. kinematics of ionized gas nebulae
Liu, G., Zakamska, N. L., Greene, J. E., Nesvadba, N. P. H. & Liu, X., Dec 1 2013, In : Monthly Notices of the Royal Astronomical Society. 436, 3, p. 2576-2597 22 p.Research output: Contribution to journal › Article
2012
Active galactic nucleus pairs from the Sloan Digital Sky Survey. II. Evidence for tidally enhanced star formation and black hole accretion
Liu, X., Shen, Y. & Strauss, M. A., Jan 20 2012, In : Astrophysical Journal. 745, 1, 94.Research output: Contribution to journal › Article
Comparing single-epoch virial black hole mass estimators for luminous quasars
Shen, Y. & Liu, X., Jul 10 2012, In : Astrophysical Journal. 753, 2, 125.Research output: Contribution to journal › Article
2011
A comparison of spectroscopic methods for detecting the starlight scattered by transiting hot Jupiters, with an application to Subaru data for HD 209458b and HD 189733b
Langford, S. V., Wyithe, J. S. B., Turner, E. L., Jenkins, E. B., Narita, N., Liu, X., Suto, Y. & Yamada, T., Jul 1 2011, In : Monthly Notices of the Royal Astronomical Society. 415, 1, p. 673-686 14 p.Research output: Contribution to journal › Article
Active galactic nucleus pairs from the Sloan Digital Sky Survey. I. the frequency on 5-100kpc scales
Liu, X., Shen, Y., Strauss, M. A. & Hao, L., Aug 20 2011, In : Astrophysical Journal. 737, 2, 101.Research output: Contribution to journal › Article
Cosmic train wreck by massive black holes: Discovery of a kiloparsec-scale triple active galactic nucleus
Liu, X., Shen, Y. & Strauss, M. A., Jul 20 2011, In : Astrophysical Journal Letters. 736, 1, L7.Research output: Contribution to journal › Article
Type 2 active galactic nuclei with double-peaked [O III] lines. II. single agns with complex narrow-line region kinematics are more common than binary AGNs
Shen, Y., Liu, X., Greene, J. E. & Strauss, M. A., Jul 1 2011, In : Astrophysical Journal. 735, 1, 48.Research output: Contribution to journal › Article
2010
Discovery of four kpc-scale binary active galactic nuclei
Liu, X., Greene, J. E., Shen, Y. & Strauss, M. A., Jan 1 2010, In : Astrophysical Journal Letters. 715, 1 PART 2, p. L30-L34Research output: Contribution to journal › Article
Type 2 active galactic nuclei with double-peaked [O III] Lines: Narrow-line region kinematics or merging supermassive black hole pairs?
Liu, X., Shen, Y., Strauss, M. A. & Greene, J. E., Jan 1 2010, In : Astrophysical Journal. 708, 1, p. 427-434 8 p.Research output: Contribution to journal › Article
2009
Host galaxies of luminous type 2 quasars AT z 0.5
Liu, X., Zakamska, N. L., Greene, J. E., Strauss, M. A., Krolik, J. H. & Heckman, T. M., Jan 1 2009, In : Astrophysical Journal. 702, 2, p. 1098-1117 20 p.Research output: Contribution to journal › Article
Host galaxies of obscured quasars: Infant starbursts caught in action
Liu, X., Zakamska, N. L., Greene, J. E., Strauss, M. A., Krolik, J. H. & Heckman, T. M., Aug 1 2009, In : Proceedings of the International Astronomical Union. 5, S267, p. 118 1 p.Research output: Contribution to journal › Article
The growth of black holes: Insights from obscured active galaxies
Greene, J. E., Zakamska, N. L., Liu, X., Barth, A. J. & Ho, L. C., Jan 1 2009, In : Astrophysical Journal. 702, 1, p. 441-459 19 p.Research output: Contribution to journal › Article
2008
Metallicities and physical conditions in star-forming galaxies at z ∼ 1.0-1.5
Liu, X., Shapley, A. E., Coil, A. L., Brinchmann, J. & Ma, C. P., May 10 2008, In : Astrophysical Journal. 678, 2, p. 758-779 22 p.Research output: Contribution to journal › Article
Theoretical radii of extrasolar giant planets: The cases of TrES-4, XO-3b, and HAT-P-1b
Liu, X., Burrows, A. & Ibgui, L., Nov 10 2008, In : Astrophysical Journal. 687, 2, p. 1191-1200 10 p.Research output: Contribution to journal › Article
2006
A cross-correlation analysis of WMAP and egret data in wavelet space
Liu, X. & Zhang, S. N., Jan 1 2006, In : Astrophysical Journal. 636, 1 II, p. L1-L4Research output: Contribution to journal › Article
2005
Non-gaussianity due to possible residual foreground signals in Wilkinson microwave anistropy probe first-year data using spherical wavelet approaches
Liu, X. & Zhang, S. N., Nov 10 2005, In : Astrophysical Journal. 633, 2 I, p. 542-551 10 p.Research output: Contribution to journal › Article
Structures in a class of magnetized scale-free discs
Shen, Y., Liu, X. & Lou, Y. Q., Feb 1 2005, In : Monthly Notices of the Royal Astronomical Society. 356, 4, p. 1333-1356 24 p.Research output: Contribution to journal › Article