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21cm brightness fluctuation at z=0.8 in cross-correlation
An intensity map of hydrogen 21-cm emission at redshift z ≈ 0.8
The GMRT Epoch of Reionization experiment: a new upper limit on the neutral hydrogen power spectrum at z ≈ 8.6
Chang, Tzu-Ching
Assistant Research Fellow
photo of Chang, Tzu-Ching
Office: ASMAB 1420
TEL: +886-2-2366-5457
FAX: +886-2-2367-7849

Education and Positions

  • Assistant Research Fellow, ASIAA (2010 ~ present)
  • 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)

Honors & Awards

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

Research Interests

21-cm Cosmology; Cosmic Reionization; Gravitational Lensing; Large-scale Structure

Recent Journal Papers

  1. 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" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 433(1), 639-647, 2013-07 [SCI]
  2. 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" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 434(1), L46-L50, 2013-07 [SCI]
  3. Anthony Pullen, (Tzu-Ching Chang), Olivier Dore, Adam Lidz, "Cross-correlations as a carbon monoxide detector" , ASTROPHYSICAL JOURNAL: 768(1), 15, 2013-05 [SCI] (Fulltext)
  4. J. C. Pober, A. R. Parsons, D. R. DeBoer, P. McDonald, M. McQuinn, J. E. Aguirre, Z. Ali, R. F. Bradley, (T.-C. Chang), M. F. Morales, "The Baryon Acoustic Oscillation Broadband and Broad-beam Array: Design Overview and Sensitivity Forecasts" , ASTRONOMICAL JOURNAL: 145 (3), 65, 2013-03 [SCI] (Fulltext)
  5. K. W. Masui, E. R. Switzer, N. Banavar, K. C. Bandura, Blake, L. M. Calin, (T.-C. Chang), X. Chen, Y.-C. Li, Y.-W. Liao, "Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation" , Astrophysical Journal Letters: 763(1), L20, 2013-01 [SCI] (Fulltext)
  6. Elisabeth Krause, (Tzu-Ching Chang), Olivier Doré, Keiichi Umetsu, "The Weight of Emptiness: The Gravitational Lensing Signal of Stacked Voids" , Astrophysical Journal Letters: 762(2), L20, 2013-01 [SCI]
  7. Lidz A; Furlanetto SR; Oh SP; Aguirre J; Chang T-C;et al. , "Intensity Mapping with Carbon Monoxide Emission Lines and the Redshifted 21 cm Line" , ASTROPHYSICAL JOURNAL: 741(2), 70, 2011-11 [SCI] (Fulltext)
  8. 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" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 413(2), 1174-1183, 2011-05 [SCI] (Fulltext)
  9. Alvarez MA; Pen UL; Chang T-C, "Enhanced Detectability of Pre-reionization 21-cm Structure" , ASTROPHYSICAL JOURNAL: 723(1), L17-L21, 2010-11 [SCI] (Fulltext)
  10. Chang TC; Pen UL; Bandura K; Peterson JB, "An intensity map of hydrogen 21-cm emission at redshift" , NATURE: 466(7305), 463-465, 2010-07 [SCI] (Fulltext)
  11. Pen UL; Chang TC; Hirata CM; et al., "The GMRT EoR experiment: limits on polarized sky brightness at 150 MHz" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 399(1), 181-194, 2009-10 [SCI] (Fulltext)
  12. Pen U-L; Staveley-Smith L; Peterson J; Chang T-C, "First Detection of Cosmic Structure in the 21-cm Intensity Field" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 394(1), L6-L10, 2009-03 [SCI] (Fulltext)
  13. Chang T-C; Pen U-L; Peterson JB; McDonald P, "Baryon Oscillation Intensity Mapping of Dark Energy" , PHYSICAL REVIEW LETTERS: 100(9), Art. No. 091303, 2008-03 [SCI] (Fulltext)
  14. Cohn JD; Chang T-C, "Source mergers and bubble growth during reionization" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 374(1), 72-94, 2007-01 [SCI] (Fulltext)
TEL: 886-2-3365-2200 FAX: 886-2-2367-7849
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