Lizhi Xie 谢利智

Astronomical Observatory of Trieste - INAF                            

Via Bazzoni, 2, Trieste, TS, Italy, 34135

Email: lzxie@oats.inaf.it

Education: 

2008.09 - 2014.11: Astrophysics, Ph. D. in Astrophysics, National Astronomical Observatories, Chinese Academic of Sciences

Supervisor: Dr. Liang Gao，Dr. Qi Guo

Thesis title: Formation and evolution of dark matter halos and galaxies

Experience:

2014.11 - Now: Postdoc in Astronomical Observatory of Trieste - INAF

Supervisor: Dr. Gabriella De Lucia

Brief Research Statement:

During my PhD, I have studied the assembly history of dark matter halos, the size evolution of massive elliptical galaxies, and the structure of cosmic voids. I use N-body dark matter simulations and semi-analytic models to analyse the evolution and formation of dark matter substructures and galaxies. As a post-doc, I have been working on improving a state of the art semianalytic-model(GAEA - Hirschman et al. 2016), focusing in particular on the adopted star formation law, galaxy disk, and black hole formation. I have implemented an explicit treatment of the partition of cold gas in atomic and molecular gas, as well as a star formation law based on the abundance of H2. I am currently exploring predictions of my model implementations, with a focus on size evolution of late-type galaxies and isotopes in ISM.

Research Interest:

Theoretical models of galaxy evolution and formation; Environment effects on galaxies; Evolution of size and density profiles of multi-phase gas disk.

Outreach:

2015 - Translate the book “The Science of Interstellar” by Prof. Kip Thorn to Chinese with 6 colleagues. ISBN: 9787213066856

2016 - Translate the book “Dark Matter and Dinosaurs” by Prof. Lisa Randall to Chinese with 5 colleagues. ISBN: 9787213077265

Publication: 11 papers since 2013, 4 as first author.

1. The Local Void: for or against ΛCDM?

    Xie, L., Gao, L., Guo, Q. 2014, MNRAS, 441, 933

2. The size evolution of elliptical galaxies

    Xie, L., Guo, Q., Cooper, A.~P., et al. 2015, MNRAS, 447, 636

3. Assembly history of subhalo populations in galactic and cluster sized dark haloe

    Xie, L., Gao, L. 2015, MARAS, 454, 1697

4. H2-based star formation law in semi-analytic models of galaxy formation

    Xie, L., De Lucia, G., Hirschmann, M., Fontanot, F., Zoldan, A., 2017, MNRAS, 469,968

5. A universe of ultra-diffuse galaxies: theoretical predictions from the LCDM simulation

    Rong, Y. , Guo, Qi., Gao, L., Liao, S., Xie, L., Puzia, T., Sun, S., Pan, J., 2017, MNRAS, 470, 423

6. The galaxy population in cold and warm dark matter cosmologies

    Wang, L., Gonzalez-Perez, V., Xie, L., et al., 2017, MNRAS, 468, 4579

7. HI-selected Galaxies in Hierarchical Models of Galaxy Formation and Evolution

    Zoldan, A., De Lucia, G., Xie, L., Fontanot, F., Hirschmann, M., 2017, MNRAS, 465, 2236

8. Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

    Li, R., Shan, H., Kneib, J.P.; Mo, H.; Rozo, E.; Leauthaud, A.; Moustakas, J.; Xie, L., et al., 2016, MNRAS, 458, 2573

9. Quiescent luminous red galaxies as cosmic chronometers: on the significance of mass and environmental dependence

    Liu, G., Lu, Y., Xie, L., Chen, X., Zhao, Y., 2016, A&A, 585, A52

10. Assembly bias of dwarf-sized dark matter haloes

    Li, R., Gao, L., Xie, L., Guo, Q., 2013, MNRAS, 435, 3592

11. Brightest Satellite Galaxy Alignment of Sloan Digital Sky Survey Galaxy Groups

    Li, Z., Wang, Y., Yang, X., Chen, X., Xie, L., Wang, X., 2013, APJ, 768, 20