Academia Sinica Institute of Astronomy & Astrophysics
中央研究院天文及天文物理研究所
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Three-dimensional cross power spectrum of the 21cm emission measured at the Green Bank Telescope and the optical density field traced by the WiggleZ redshift survey. Negative points are shown with reversed sign and a thin line. The solid line is the mean of simulations based on the empirical non-linear model of Blake et al. (2011) processed by the same pipeline. The overall amplitude is consistent with a measurement of Omega_HI~4*10^(-4) at z=0.8, similar to the value measured at z=0.
21cm brightness fluctuation at z=0.8 in cross-correlation
A cross-correlation measurement of 21-cm emission measured by the Green Bank Telescope, and the optical galaxies measured by the DEEP2 galaxy survey.
An intensity map of hydrogen 21-cm emission at redshift z ≈ 0.8
Average power spectrum in units of K 2 of all combinations of days, excluding December 11, as a function of the multipole moment l. Each point is shown with a 2σ upper limit derived from a bootstrap error analysis, which is in most cases smaller than the size of the point. The points are logarithmically spaced as described in the text, from left to right covering the ranges 377 < l < 578, 578 < l < 899 and 899 < l < 1414. Triangles are the power before subtracting foregrounds, diamonds are after 8 MHz mean subtraction, squares are after 2 MHz mean subtraction and circles are after 0.5 MHz subtraction. The curved solid line is the theoretical EoR signal from Jelic et al. (2008), and the dashed line is the theoretical EoR signal ´ with a cold absorbing IGM as described in the text.
The GMRT Epoch of Reionization experiment: a new upper limit on the neutral hydrogen power spectrum at z ≈ 8.6
張慈錦
訪問學者 (加州理工學院噴射推進實驗室)
張慈錦的相片
電子信箱: tzu-ching.chang_replace2@_jpl.nasa.gov

學經歷

  • JPL, Research Scientist (2017~ 迄今)
  • 助研究員 (2010~2016)
  • CITA-ASIAA Postdoctoral Fellow, Canadian Institute for Theoretical Astrophysics and ASIAA (2006~2010)
  • TAC Fellow, UC Berkeley (2003~2006)
  • Ph.D, Astrophysics, Columbia University (2003)
  • B.S., Physics, National Taiwan University (1997)

榮譽與獎勵

  • TWAS Young Affiliate (2012~2016)
  • Academia Sinica Distinguished Postdoctoral Fellowship (2007~2009)
  • TAC Fellowship, UC Berkeley (2003)

研究興趣

宇宙的再游離; 重力透鏡; 宇宙的大尺度結構

期刊論文(中研院就職期間發表)

  1. Wang W-H; Foucaud S; Hsieh B-C; Jian H-Y; Lin L; Lin Y-T; Coupon J; Hashimoto Y; Ouchi M; Shimasaku K; Ohyama Y; Umetsu K; Wang S-Y; Chang T-C, "MUSUBI (MegaCam Ultra-deep Survey: u*-band Imaging) Data for the COSMOS and SXDS Fields" , ApJS: 260(2), id.54 (15 pp), June, 2022 [SCI] ( ADS | Fulltext )
  2. Wolz L; Pourtsidou A; Masui KW; Chang T-C; Bautista JE; Müller E-M; Avila S; Bacon D; Percival WJ; Cunnington S; Anderson C; Chen X; Kneib J-P; Li Y-C; Liao Y-W; Pen U-L; Peterson JB; Rossi G; Schneider DP; Yadav J; Zhao G-B, "H I constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps" , MNRAS: 510(3), 3495–3511, Mar, 2022 [SCI] ( ADS | Fulltext )
  3. Sun G; Chang T-C; Uzgil BD; Bock JJ; Bradford CM; Butler V; Caze-Cortes T; Cheng Y-T; Cooray A; Crites AT; Hailey-Dunsheath S; Emerson N; Frez C; Hoscheit BL; Hunacek J; Keenan RP; Li CT; Madonia P; Marrone DP; Moncelsi L; Shiu C; Trumper I; Turner A; Weber A; Wei TS; Zemcov M, "Probing Cosmic Reionization and Molecular Gas Growth with TIME" , ApJ: 915(1), id.33 (24 pp), Jul, 2021 [SCI] ( ADS | Fulltext )
  4. Cheng Y-T; Chang T-C; Bock JJ, "Phase-space Spectral Line Deconfusion in Intensity Mapping" , ApJ: 901(2), id.142 (20pp.), Oct, 2020 [SCI] ( ADS | Fulltext )
  5. Cheng Y-T; de Putter R; Chang T-C, et al., "Optimally Mapping Large-scale Structures with Luminous Sources" , ApJ: 877(2), id. 86 (21 pp.), Jun, 2019 [SCI] ( ADS | Fulltext )
  6. Feng C; Cooray A; Bock J; Chang TC; et al., "Multi-component Decomposition of Cosmic Infrared Background Fluctuations" , ApJ: 875(2), id. 86 (13 pp.), Apr, 2019 [SCI] ( ADS | Fulltext )
  7. Anderson CJ; Luciw NJ; Li Y-C; Kuo CY; ...; Chang T-C; ...; Liao Y-W; Pen, U.-L.; et al., "Low-amplitude clustering in low-redshift 21-cm intensity maps cross-correlated with 2dF galaxy densities" , MNRAS: 476(3), 3382-3392, May, 2018 [SCI] ( ADS | Fulltext )
  8. Hunacek J; Bock J; Bradford CM; ...; Chang TC; ...; Li CT; et al., "Hafnium Films and Magnetic Shielding for TIME, A mm-Wavelength Spectrometer Array" , J Low Temp Phys: 193(5-6), 893-900, Dec, 2018 [SCI] ( ADS | Fulltext )
  9. Pullen AR; Serra P; Chang T-C; et al., "Search for C II Emission on Cosmological Scales at Redshift Z ˜ 2.6" , MNRAS: 478(2), 1911-1924, Aug, 2018 [SCI] ( ADS | Fulltext )
  10. Sun G; Moncelsi L; Viero MP; ...; Chang T-C; et al., "A Foreground Masking Strategy for [C II] Intensity Mapping Experiments Using Galaxies Selected by Stellar Mass and Redshift" , ApJ: 856(2), 107, April, 2018 [SCI] ( ADS | Fulltext )
  11. Suyu SH; Chang T-C; Courbin F; Okumura T, "Cosmological distance indicators" , Space Sci Rev: 214(5), id. 91 (34 pp.), Aug, 2018 [SCI] ( ADS | Fulltext )
  12. Wolz L; Blake C; Abdalla FB; ...; Chang T-C; et al., "Erasing the Milky Way: new cleaning technique applied to GBT intensity mapping data" , MNRAS: 464(4), 4938-4949, Feb, 2017 [SCI] ( ADS | Fulltext )
  13. Cheng Y-T; Chang T-C; Bock J; et al., "Spectral Line De-confusion in an Intensity Mapping Survey" , ApJ: 832(2), 165, Dec, 2016 [SCI] ( ADS | Fulltext )
  14. Cohn JD; White M; Chang T-C; et al., "Combining galaxy and 21-cm surveys" , MNRAS: 457(2), 2068-2077, April, 2016 [SCI] ( ADS | Fulltext )
  15. Hunacek J; Bock J; Bradford CM; ...; Chang TC; Cheng, YT; ...; Koch P; Li CT; et al., "Design and Fabrication of TES Detector Modules for the TIME-Pilot [CII] Intensity Mapping Experiment" , J Low Temp Phys: 184(3-4), 733-738, Aug, 2016 [SCI] ( ADS | Fulltext )
  16. Liao Y-W; Chang T-C; Kuo C-Y; et al., "Accurate Polarization Calibration at 800 MHz with the Green Bank Telescope" , ApJ: 833(2), 289, Dec, 2016 [SCI] ( ADS | Fulltext )
  17. Venumadhav T; Chang T-C; Doré O; Hirata CM, "A Practical Theorem on Using Interferometry to Measure the Global 21-cm Signal" , ApJ: 826(2), 116, Aug 1, 2016 [SCI] ( ADS | Fulltext )
  18. Keating GK; Bower GC; Marrone DP; ...; Chang T-C; et al., "First Results from COPSS: The CO Power Spectrum Survey" , ApJ: 814(2), 140, Dec, 2015 [SCI] ( ADS | Fulltext )
  19. Masui K; Lin HH; Sievers J; Anderson CJ; Chang TC; Chen XL;Ganguly A; Jarvis M; Kuo CY; Li YC; Liao YW; et al., "Dense magnetized plasma associated with a fast radio burst" , Nature: 528(7583), 523–525, Dec 24, 2015 [SCI] ( ADS | Fulltext )
  20. Rhodes J; Allen S; Benson BA; Chang T; et al., "Exploiting Cross Correlations and Joint Analyses" , Astroparticle Physics: 63, 42-54, Mar, 2015 [SCI] ( ADS | Fulltext )
  21. Switzer ER; Chang T-C; Masui KW; Pen U-L; Voytek TC, "Interpreting the Unresolved Intensity of Cosmologically Redshifted Line Radiation" , ApJ: 815(1), 51, Dec, 2015 [SCI] ( ADS | Fulltext )
  22. Krause E; Chang T-C; Dor'e O; Umetsu K, "The Weight of Emptiness: The Gravitational Lensing Signal of Stacked Voids" , ApJL: 762(2), L20, Jan, 2013 [SCI] ( ADS | Fulltext )
  23. Masui KW; Switzer ER; Banavar N; ...; Chang T-C; ...; Liao Y-W; al., "Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation" , ApJL: 763(1), L20, Jan 20, 2013 [SCI] ( ADS | Fulltext )
  24. Paciga G; Albert JG; Bandura K; Chang T-C; et al., "A simulation-calibrated limit on the H I power spectrum from the GMRT Epoch of Reionization experiment" , MNRAS: 433(1), 639-647, July, 2013 [SCI] ( ADS | Fulltext )
  25. Pober JC; Parsons AR; DeBoer DR; ...; Chang TC; et al., "The Baryon Acoustic Oscillation Broadband and Broad-beam Array: Design Overview and Sensitivity Forecasts" , AJ: 145 (3), 65, Mar, 2013 [SCI] ( ADS | Fulltext )
  26. Pullen AR; Chang TC; Dore O; Lidz A, "Cross-correlations as a Cosmological Carbon Monoxide Detector" , ApJ: 768(1), 15, May 1, 2013 [SCI] ( ADS | Fulltext )
  27. Switzer ER; Masui KW; Bandura K; ...; Chang T-C; ...; Liao Y-W; et al., "Determination of z ˜ 0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping autocorrelation" , MNRAS: 434(1), L46-L50, July, 2013 [SCI] ( ADS | Fulltext )
  28. Lidz A; Furlanetto SR; Oh SP; Aguirre J; Chang T-C; Dore O; Pritchard JR, "Intensity Mapping with Carbon Monoxide Emission Lines and the Redshifted 21 cm Line" , ApJ: 741(2), 70, Nov 10, 2011 [SCI] ( ADS | Fulltext )
  29. Paciga G; Chang T-C; Gupta Y; et al., "The GMRT Epoch of Reionization experiment: a new upper limit on the neutral hydrogen power spectrum at z≈ 8.6" , MNRAS: 413(2), 1174-1183, May, 2011 [SCI] ( ADS | Fulltext )
  30. Alvarez MA; Pen UL; Chang T-C, "Enhanced Detectability of Pre-reionization 21-cm Structure" , ApJ: 723(1), L17-L21, Nov 1, 2010 [SCI] ( ADS | Fulltext )
  31. Chang T-C; Pen UL; Bandura K; Peterson JB, "An intensity map of hydrogen 21-cm emission at redshift z approximate to 0.8" , Nature: 466(7305), 463-465, Jul 22, 2010 [SCI] ( ADS | Fulltext )
  32. Pen U-L; Staveley-Smith L; Peterson J; Chang T-C, "First Detection of Cosmic Structure in the 21-cm Intensity Field" , MNRAS: 394(1), L6-L10, Mar, 2009 [SCI] ( ADS | Fulltext )
  33. Pen UL; Chang T-C; Hirata CM; et al., "The GMRT EoR experiment: limits on polarized sky brightness at 150 MHz" , MNRAS: 399(1), 181-194, OCT 11, 2009 [SCI] ( ADS | Fulltext )
  34. Chang T-C; Pen U-L; Peterson JB; McDonald P, "Baryon Acoustic Oscillation Intensity Mapping of Dark Energy" , Phys Rev Lett: 100(9), Art. No. 091303, March 7, 2008 [SCI] ( ADS | Fulltext )
  35. Cohn JD; Chang T-C, "Source mergers and bubble growth during reionization" , MNRAS: 374(1), 72-94, Jan, 2007 [SCI] ( ADS | Fulltext )
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台北市10617羅斯福路四段1號 中央研究院/台灣大學天文數學館11樓