Hui Tian
 

Astrophysicist
Harvard-Smithsonian Center for Astrophysics
60 Garden Street, MS-58
Cambridge, MA 02138 USA

Phone: (617)4967871
Email: hui.tian@cfa.harvard.edu

 

Research Projects

June 2013-now:
Instrument operation, calibrations, and science data analysis for the IRIS mission

August 2012-June 2013:
Pre-launch software testing, operation and calibration preparation for the IRIS mission

August 2010-August 2012:
Spectroscopic investigation of coronal waves, flows, jets, and CMEs using data from HINODE/EIS and SDO/AIA

January 2012-August 2012:
CoMP level-2 data generation and correction, Alfvén wave tracking, Dynamics and polarization of CMEs

October 2010-December 2011:
Observations of Alfvén waves and magnetic structures in the solar wind with WIND

September 2005-July 2010:
Spectroscopic observations of solar transition region and solar wind origin with SOHO/SUMER, HINODE/EIS, TRACE

January 2007-July 2010:
Reconnection observations in the solar wind and magnetosphere with WIND and Cluster

 

Education and Employment

August 2012-now:
Astrophysicist at Harvard-Smithsonian Center for Astrophysics

August 2010-August 2012:
ASP Postdoc Fellow at High Altitude Observatory, National Center for Atmospheric Research

September 2005-July 2010:
Ph.D. student at Peking University
Visiting Ph.D. student at Max-Planck-Institute for solar system research

 

Selected Presentations

Tian, H.: Prevalence of Micro-jets from the Network Structures of the Solar Transition Region, AGU 2014, San Francisco, CA, Dec 15-19, 2014

Tian, H.: Prevalence of Small-scale Jets from the Network Structures of the Solar Transition Region and Chromosphere, 2014 LWS / HINODE/ IRIS Workshop, Portland, OR, Nov 3-6, 2014 (invited)

Tian, H.: The solar transition region: From SUMER to IRIS, Retirement colloquium of Dr. Werner Curdt, Goettingen, Germany, May 15, 2014 (invited)

Tian, H.: Crossing the transition region, workshop From the Heliosphere into the Sun, Bad Honnef, Germany, Jan 31-Feb 3, 2012 (invited)

Tian, H.: The mass cycle between the chromosphere and the corona/solar wind, SDO-4 / IRIS / Hinode workshop, Monterey, CA, March 12-16, 2012(invited)

Tian, H.: Coronal outflows from active region boundaries and CME-induced dimming regions, Solar Wind 13, Big Island, Hawaii, June 18-22, 2012

Tian, H.: Spectroscopic observations of CMEs, workshop Solar in Sonoma-Tracing the connections in solar eruptive events, Petaluma, CA, Nov 27-Dec 2, 2012

 

Selected Publications

Tian, H., Li, G., Reeves, K. K., Raymond, J. C., Guo F., Liu, W., Chen, B., Murphy, N. A., Imaging and spectroscopic observations of magnetic reconnection and chromospheric evaporation in a solar flare, Astrophys. J. Lett., in press, 2014

Tian, H., DeLuca, E. E., Cranmer, S. R., et al., Prevalence of small-scale jets from the networks of the solar transition region and chromosphere, Science, 346, 1255711, 2014

Peter, H., Tian, H., Curdt, W., et al., Hot explosions in the cool atmosphere of the Sun, Science, 346, 1255726, 2014

Tian, H., Kleint, L., Peter, H., et al., Observations of Subarcsecond Bright Dots in the Transition Region above Sunspots with the Interface Region Imaging Spectrograph, Astrophys. J. Lett., 790, L29, 2014

Tian, H., DeLuca, E., Reeves, K. K., et al., High-resolution Observations of the Shock Wave Behavior for Sunspot Oscillations with the Interface Region Imaging Spectrograph, Astrophys. J., 786, 137, 2014

Tian, H., Tomczyk, S., McIntosh, S. W., Bethge, C., de Toma, G., Gibson, S., Observations of coronal mass ejections with the Coronal Multichannel Polarimeter, Sol. Phys., 288, 637, 2013

Tian, H., McIntosh, S. W., Wang, T.-J., Ofman, L., De Pontieu, B., Innes, D. E., Peter, H., Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: Spectroscopic signatures of Alfvénic waves and recurring upflows, Astrophys. J., 759, 144, 2012

Tian, H., McIntosh, S. W., Xia, L.-D., He, J.-S., Wang, X., What can we learn about solar coronal mass ejections, coronal dimmings, and Extreme-Ultraviolet jets through spectroscopic observations, Astrophys. J., 748, 106, 2012

Tian, H., McIntosh, S. W., De Pontieu, B., Martínez-Sykora, J., Sechler, M., Wang, X., Two components of the solar coronal emission revealed by Extreme-Ultraviolet spectroscopic observations, Astrophys. J., 738, 18, 2011

Tian, H., McIntosh, S. W., Habbal, R. S., He, J.-S., Observation of high-speed outflow on plume-like structures of the quiet sun and coronal holes with Solar Dynamics Observatory/Atmospheric Imaging Assembly, Astrophys. J., 736, 130, 2011

Tian, H., McIntosh, S. W., De Pontieu, B., The spectroscopic signature of quasi-periodic upflows in active region timeseries, Astrophys. J. Lett., 727, L37, 2011

Tian, H., Tu, C.-Y., Marsch, E., He, J.-S., Kamio, S., The Nascent Fast Solar Wind Observed by the EUV Imaging Spectrometer on Board Hinode, Astrophys. J., 709, L88, 2010

Tian, H., Yao, S., Zong, Q.-G., He, J.-S., & Qi, Y., Signatures of magnetic reconnection at boundaries of interplanetary small-scale magnetic flux ropes, Astrophys. J., 720, 454, 2010

Tian, H., Potts, H. E., Marsch, E., Attie, R., & He, J.-S., Horizontal supergranule-scale motions inferred from TRACE ultraviolet observations of the chromosphere, Astron. Astrophys., 519, A58, 2010

Tian, H., Teriaca, L., Curdt, W., Vial, J.-C., Hydrogen Lyα and Lyβ radiances and profiles in polar coronal holes, Astrophys. J. Lett., 703, L152, 2009

Tian, H., Curdt, W., Marsch, E., & Schühle, U. Hydrogen Lyman-α and Lyman-β spectral radiance profiles in the quiet Sun, Astron. Astrophys., 504, 239, 2009

Tian, H., Curdt, W., Teriaca, L., Landi, E., & Marsch, E., Solar transition region above sunspots, Astron. Astrophys., 505, 307, 2009

Tian, H., Marsch, E., Curdt, W., He, J.-S., Upflows in funnel-like legs of coronal magnetic loops, Astrophys. J., 704, 883, 2009

Tian, H., Curdt, W., Marsch, E., &He, J.-S., Cool and hot components of a coronal bright point, Astrophys. J. Lett., 681, L121, 2008

Tian, H., Marsch, E., Tu, C.-Y., Xia, L.-D., &He, J.-S., Sizes of transition-region structures in coronal holes and in the quiet Sun, Astron. Astrophys., 482, 267, 2008

Tian, H., Tu, C.-Y., Marsch, E., He, J.-S.,&Zhou, G.-Q., Signature of mass supply to quiet coronal loops, Astron. Astrophys., 478, 915, 2008

Tian, H., Xia, L.-D., He, J.-S., Tan, B., &Yao, S., The emission heights of transition region lines in an equatorial coronal hole and the surrounding quiet Sun, Chin. J. Aston. Astropys., Vol. 8, No. 6, 732, 2008

McIntosh, S. W., Tian, H., Sechler, M., De Pontieu, B., On the Doppler Velocity of Emission Line Profiles Formed in the "Coronal Contraflow" that is the Chromosphere-Corona Mass Cycle, Astrophys. J., 749, 60, 2012

Gosling, J. T., Tian, H., Phan, T., Pulsed Alfvén waves in the solar wind, Astrophys. J. Lett., 737, L35, 2011

Curdt, W., Tian, H., Spectroscopic evidence for helicity in explosive events, Astron. Astrophys., 532, L9, 2011

Marsch, E., Tian, H., Sun, J., Curdt, W., & Wiegelmann, T., Plasma flows guided by strong magnetic fields in the solar corona, Astrophys. J., 685, 1262, 2008

Curdt, W., Tian, H., Dwivedi, B.N., & Marsch, E., The redshifted network contrast of transition region emission, Astron. Astrophys., 491, L13, 2008

Curdt, W., Tian, H., Teriaca, L., Schühle, U., & Lemaire, P.,The Ly-α profile and center-to-limb variation of the quiet Sun, Astron. Astrophys., 492, L9, 2008

He, J.-S., Tu, C.-Y., Tian, H., et al., A magnetic null geometry reconstructed from Cluster spacecraft observations, J. Geophys. Res., 113, A05205, 2008

He, J.-S., Tu, C.-Y., Marsch, E., & Tian, H., Excitation of kink waves due to small-scale magnetic reconnection in the chromosphere? Astrophys. J. Lett., 705, L217, 2009

Fontenla, J. M., Curdt, W., Haberreiter, M., Harder, J., & Tian, H., Semi-empirical models of the solar atmosphere III. Set of NLTE models for FUV/EUV irradiance computation, Astrophys. J., 707, 482, 2009

 

Welcome to the homepage of Hui Tian. I am a researcher working in the fields of space and solar physics, with an emphasis on UV spectroscopy of the Sun. My research interest includes solar transition region dynamics, coronal heating, solar wind origin, magnetic reconnection in solar flares and solar wind, dynamics and magnetism of coronal mass ejections.

I am a member of the IRIS team. I am currently involved in the instrument operation, in-flight calibrations and science data analysis.

 


IRIS was launched on June 27 2013. It is now obtaining UV spectra and images of the solar transition region and chromosphere with very high resolution in space (0.33-0.4 arcsec) and time (1s).

The transition region and chromosphere is a complex interface region between the Sun's cool photosphere and extremely hot corona. In this region, all but a few percent of the non-radiative energy leaving the Sun is converted into heat and radiation. Here, magnetic field and plasma exert comparable forces, resulting in a dynamic region whose understanding remains a challenge.

Learn more ...

 

Movies

Dynamics of network jets observed with IRIS: Tian et al. 2014, Science, 346, 1255711

The prevalent network jets observed with IRIS: Tian et al. 2014, Science, 346, 1255711

The unprecedented details of coronal hole dynamics observed by AIA 171: Tian et al. 2011, ApJ, 736, 130

First-ever high-cadence large-FOV spectroscopy: CoMP observations of CMEs and Alfven waves: Tian et al. 2013, Sol. Phys., 288, 637

High-speed propagating disturbances at AR boundaries observed with AIA 193: Tian et al. 2011, ApJ, 738, 18

 

Useful Links

The Sun Today

Solar Monitor

SDO

Virtual Solar Observatory

SOHO LASCO CME Catalog

Space Weather Prediction Center

Wolbach Library

ADS

ApJ

ApJL

A&A

Sol. Phys.

RAA

MAST


 

 
 


Prevalent network jets from the solar wind source region: Tian et al. 2014, Science, 346, 1255711


High-speed outflows from dimming regions may provide additional momentum for CME acceleration: Tian et al. 2012, ApJ, 748, 106


Center to limb variation of AR outflows: Tian et al. 2012, ApJ, 748, 106


High-speed propagating disturbances observed by SDO/AIA: Tian et al. 2011, ApJ, 738, 18


Persistent Doppler shift oscillation indicative of coronal Alfven waves: Tian et al. 2012, ApJ, 759, 144


Periodic signals are not necessarily waves: Tian et al. 2011, ApJ, 727, L37


Two components of the coronal emission at AR boundaries: Tian et al. 2011, ApJ, 738, 18


HINODE/EIS observation of the coronal hole: Tian et al. 2010, ApJ, 709, L88


Different transition region structures in coronal holes and quiet Sun regions: Tian et al. 2008, A&A, 482, 267


Apparent horizontal flows inferred from both white light and UV continuum images: Tian et al. 2010, A&A, 519, A58


Nascent solar wind guided by expanding magnetic funnels: Tian et al. 2008, A&A, 478, 915


SOHO/SUMER observations of Ly-alpha and Ly-beta line profiles: Tian et al. 2009, ApJ, 703, L152