Associate Professor Yuan-Sen Ting
Ph.D. (Harvard), AM (Harvard)
Associate Professor
ANU College of Science
Research interests
My research group is at the nexus of machine learning and large astronomical surveys. Our inquiries touch on numerous areas, encompassing stellar astrophysics, star formation, galactic evolution, black holes, reionization, and cosmology. A central facet of our methodology involves expanding the horizon of Bayesian statistics with contemporary deep learning methodology. This approach proves invaluable for analyzing vast survey datasets, drawing from sources like spectroscopy (SDSS-V, DESI, 4MOST), astrometry (Gaia), photometry (Euclid, Roman, CSST), and time-series data (LSST, TESS, PLATO). This synthesis often sheds light on some of the discipline's core questions.
In the realm of machine learning, beyond simulation-based inference with both flow-based and score-based models, we're also delving into the potential of Large Language Models. I jointly head the UniverseTBD collaboration, an initiative aimed at combing through the extensive corpus of astronomical literature. By fine-tuning existing foundational models, we aspire to uncover the mechanisms behind scientific breakthroughs. On another front, we're probing the statistical behaviors of neural networks to glean mathematical revelations pertinent to our astronomical research.
Homepage:
Publications
- Li, Y, Luo, A, Lu, Y et al. 2021, '591 High-velocity Stars in the Galactic Halo Selected from LAMOST DR7 and Gaia DR2', Astrophysical Journal Supplement Series, vol. 252, no. 1.
- Huang, Y, Yuan, H, Li, C et al. 2021, 'Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Recalibration of SMSS DR2', The Astrophysical Journal, vol. 907, no. 68, pp. 1-16.
- Xiang, M, Rix, H, Ting, Y et al. 2021, 'Data-driven spectroscopic estimates of absolute magnitude, distance, and binarity: Method and catalog of 16,002 O- And B-type stars from LAMOST', Astrophysical Journal Supplement Series, vol. 253, no. 1.
- Cotar, K, Zwitter, T, Traven, G et al. 2021, 'The GALAH survey: Characterization of emission-line stars with spectral modelling using autoencoders', Monthly Notices of the Royal Astronomical Society, vol. 500, no. 4, pp. 4849-4865.
- Zucker, D, Simpson, J, Martell, S et al. 2021, 'The GALAH Survey: No Chemical Evidence of an Extragalactic Origin for the Nyx Stream', Astrophysical Journal Letters, vol. 912, no. 2.
- O’Briain, T, Ting, Y, Fabbro, S et al. 2021, 'Cycle-starnet: Bridging the gap between theory and data by leveraging large data sets', The Astrophysical Journal, vol. 906, no. 2.
- Kos, J, Bland-Hawthorn, J, Buder, S et al. 2021, 'The GALAH survey: Chemical homogeneity of the Orion complex', Monthly Notices of the Royal Astronomical Society, vol. 506, no. 3, pp. 4232-4250.
- Munari, U, Traven, G, Masetti, N et al. 2021, 'The GALAH survey and symbiotic stars - I. Discovery and follow-up of 33 candidate accreting-only systems', Monthly Notices of the Royal Astronomical Society, vol. 505, no. 4, pp. 6121-6154.
- Sharma, S, Hayden, M, Bland-Hawthorn, J et al. 2021, 'Fundamental relations for the velocity dispersion of stars in the Milky Way', Monthly Notices of the Royal Astronomical Society, vol. 506, no. 2, pp. 1761-1776.
- Clark, J, Clerté, M, Hinkel, N et al. 2021, 'The GALAH Survey: Using galactic archaeology to refine our knowledge of TESS target stars', Monthly Notices of the Royal Astronomical Society, vol. 504, no. 4, pp. 4968-4989.
- Hawkins, K, Lucey, M, Ting, Y et al. 2020, 'Identical or fraternal twins? The chemical homogeneity of wide binaries from Gaia DR2', Monthly Notices of the Royal Astronomical Society, vol. 492, no. 1, pp. 1164-1179.
- Lin, J, Asplund, M, Ting, Y et al. 2020, 'The GALAH survey: temporal chemical enrichment of the galactic disc', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 2, pp. 2043-2056.
- Cheng, S, Ting, Y, Menard, B et al. 2020, 'A new approach to observational cosmology using the scattering transform', Monthly Notices of the Royal Astronomical Society, vol. 499, no. 4, pp. 5902-5914.
- Naidu, R, Conroy, C, Bonaca, A et al. 2020, 'Evidence from the H3 survey that the stellar halo is entirely comprised of substructure', The Astrophysical Journal, vol. 901, no. 1, pp. 1-32.
- Simpson, J, Martell, S, Da Costa, G et al. 2020, 'The GALAH Survey: Chemically tagging the Fimbulthul stream to the globular cluster ω Centauri', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 3, pp. 3374-3384.
- Traven, G, Feltzing, S, Merle, T et al. 2020, 'The GALAH survey: multiple stars and our Galaxy. I. A comprehensive method for deriving properties of FGK binary stars', Astronomy and Astrophysics, vol. 638, no. A145.
- Hayden, M, Bland-Hawthorn, J, Sharma, S et al. 2020, 'The GALAH survey: chemodynamics of the solar neighbourhood', Monthly Notices of the Royal Astronomical Society, vol. 493, no. 2, pp. 2952-2964.
- Zaritsky, D, Conroy, C, Naidu, R et al. 2020, 'Discovery of Magellanic Stellar Debris in the H3 Survey', Astrophysical Journal Letters, vol. 905, no. 1.
- Kumar, Y, Reddy, B, Campbell, S et al. 2020, 'Discovery of ubiquitous lithium production in low-mass stars', Nature Astronomy, vol. 4, pp. 1059-1063.
- Lucey, M, Ting, Y, Ramachandra, N et al. 2020, 'From the inner to outer Milky Way: a photometric sample of 2.6 million red clump stars', Monthly Notices of the Royal Astronomical Society, vol. 495, no. 3, pp. 3087-3103.
- Frankel, N, Sanders, J, Ting, Y et al. 2020, 'Keeping It Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk', The Astrophysical Journal, vol. 896, no. 1, pp. -.
- Cargile, P, Conroy, C, Johnson, B et al. 2020, 'MINESweeper: Spectrophotometric Modeling of Stars in the Gaia Era', The Astrophysical Journal, vol. 900, no. 1, pp. -.
- Bonaca, A, Conroy, C, Cargile, P et al. 2020, 'Timing the Early Assembly of the Milky Way with the H3 Survey', Astrophysical Journal Letters, vol. 897, no. 1, pp. 1-7.
- Gao, X, Lind, K, Amarsi, A et al. 2020, 'The GALAH survey: A new constraint on cosmological lithium and Galactic lithium evolution from warm dwarf stars', Monthly Notices of the Royal Astronomical Society: Letters, vol. 497, no. 1, pp. L30-L34.
- Sandford, N, Weisz, D & Ting, Y 2020, 'Forecasting Chemical Abundance Precision for Extragalactic Stellar Archaeology', The Astrophysical Journal, vol. 249, no. 24.
- Xiang, M, Rix, H, Ting, Y et al. 2020, 'Chemically Peculiar A and F Stars with Enhanced s-process and Iron-peak Elements: Stellar Radiative Acceleration at Work', The Astrophysical Journal, vol. 898, no. 1, pp. -.
- Johnson, B, Conroy, C, Naidu, R et al. 2020, 'A Diffuse Metal-poor Component of the Sagittarius Stream Revealed by the H3 Survey', The Astrophysical Journal, vol. 900, no. 2, pp. -.
- Lancaster, L, Greene, J, Ting, Y et al. 2020, 'A Mystery in Chamaeleon: Serendipitous Discovery of a Galactic Symbiotic Nova', The Astronomical Journal, vol. 160, no. 3, pp. 1-14.
- Kovalev, M, Bergemann, M, Ting, Y et al. 2019, 'Non-LTE chemical abundances in Galactic open and globular clusters', Astronomy and Astrophysics, vol. 628, no. A54.
- Cotar, K, Zwitter, T, Traven, G et al. 2019, 'The GALAH survey: unresolved triple Sun-like stars discovered by the Gaia mission', Monthly Notices of the Royal Astronomical Society, vol. 487, no. 2, pp. 2474-2490.
- Sharma, S, Stello, D, Bland-Hawthorn, J et al. 2019, 'The K2-HERMES Survey: age and metallicity of the thick disc', Monthly Notices of the Royal Astronomical Society, vol. 490, no. 4, pp. 5335-5352.
- Simpson, J, Martell, S, Da Costa, G et al. 2019, 'The GALAH survey: co-orbiting stars and chemical tagging', Monthly Notices of the Royal Astronomical Society, vol. 482, no. 4, pp. 5302-5315.
- Buder, S, Lind, K, Ness, M et al. 2019, 'The GALAH survey: An abundance, age, and kinematic inventory of the solar neighbourhood made with TGAS', Astronomy and Astrophysics, vol. 624, no. A19.
- Kamdar, H, Conroy, C, Ting, Y et al. 2019, 'A Dynamical Model for Clustered Star Formation in the Galactic Disk', The Astrophysical Journal, vol. 884, no. 2.
- Ting, Y, Conroy, C, Rix, H et al. 2019, 'The Payne: Self-consistent ab initio Fitting of Stellar Spectra', The Astrophysical Journal, vol. 879, no. 69, pp. 1-22.
- Xiang, M, Ting, Y, Rix, H et al. 2019, 'Abundance Estimates for 16 Elements in 6 Million Stars from LAMOST DR5 LowResolution Spectra', Astrophysical Journal Supplement Series, vol. 245, no. 2.
- Frankel, N, Sanders, J, Rix, H et al. 2019, 'The Inside-out Growth of the Galactic Disk', The Astrophysical Journal, vol. 884, no. 2.
- Kamdar, H, Conroy, C, Ting, Y et al. 2019, 'Stars that Move Together Were Born Together', Astrophysical Journal Letters, vol. 884, no. 2.
- Nataf, D, Wyse, R, Schiavon, R et al. 2019, 'The Relationship between Globular Cluster Mass, Metallicity, and Light-element Abundance Variations', The Astronomical Journal, vol. 158, no. 1.
- Ting, Y & Walter-Rix, H 2019, 'The Vertical Motion History of Disk Stars throughout the Galaxy', The Astrophysical Journal, vol. 878, no. 1.
- Khanna, S, Sharma, S, Tepper-Garcia, T et al. 2019, 'The GALAH survey and Gaia DR2: Linking ridges, arches, and vertical waves in the kinematics of the Milky Way', Monthly Notices of the Royal Astronomical Society, vol. 489, no. 4, pp. 4962-4979.
- Bland-Hawthorn, J, Sharma, S, Tepper-Garcia, T et al. 2019, 'The GALAH survey and Gaia DR2: dissecting the stellar disc's phase space by age, action, chemistry, and location', Monthly Notices of the Royal Astronomical Society, vol. 486, no. 1.
- Khanna, S, Sharma, S, Bland-Hawthorn, J et al. 2019, 'The GALAH survey: velocity fluctuations in the Milky Way using Red Clump giants', Monthly Notices of the Royal Astronomical Society, vol. 482, no. 3, pp. 4215-4232.
- Hawkins, K, Ting, Y & Walter-Rix, H 2018, 'Photospheric Diagnostics of Core Helium Burning in Giant Stars', The Astrophysical Journal, vol. 853, no. 1, pp. 6pp.
- Krumholz, M & Ting, Y 2018, 'Metallicity fluctuation statistics in the interstellar medium and young stars - I. Variance and correlation', Monthly Notices of the Royal Astronomical Society, vol. 475, no. 2, pp. 2236-2252pp.
- El-Badry, K, Ting, Y, Rix, H et al. 2018, 'Discovery and characterization of 3000+ main-sequence binaries from APOGEE spectra', Monthly Notices of the Royal Astronomical Society, vol. 476, no. 1, pp. 528-553.
- Ting, Y, Hawkins, K & Rix, H 2018, 'A Large and Pristine Sample of Standard Candles across the Milky Way: ~100,000 Red Clump Stars with 3% Contamination', Astrophysical Journal Letters, vol. 858, no. 7, pp. 7pp.
- Ting, Y, Conroy, C, Rix, H et al. 2018, 'Measuring Oxygen Abundances from Stellar Spectra without Oxygen Lines', The Astrophysical Journal, vol. 860, no. 159, pp. 7pp.
- Lin, J, Dotter, A, Ting, Y et al. 2018, 'Stellar ages and masses in the solar neighbourhood: Bayesian analysis using spectroscopy and Gaia DR1 parallaxes', Monthly Notices of the Royal Astronomical Society, vol. 477, no. 3, pp. 2966-2975.
- Duong, L, Freeman, K, Asplund, M et al. 2018, 'The GALAH survey: Properties of the Galactic disc(s) in the solar neighbourhood', Monthly Notices of the Royal Astronomical Society, vol. 476, no. 4, pp. 5216-5232pp.
- Ting, Y, Hawkins, K & Rix, H 2018, 'Erratum: A Large and Pristine Sample of Standard Candles across the Milky Way: similar to 100,000 Red Clump Stars with 3% Contamination', Astrophysical Journal Letters, vol. 864, no. 2, p. 1.
- Kos, J, Bland-Hawthorn, J, Freeman, K et al. 2018, 'The GALAH survey: chemical tagging of star clusters and new members in the Pleiades', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 4, pp. 4612-4633.
- El-Badry, K, Rix, H, Ting, Y et al. 2018, 'Signatures of unresolved binaries in stellar spectra: implications for spectral fitting', Monthly Notices of the Royal Astronomical Society, vol. 473, no. 4, pp. 5043-5049pp.
- Ness, M, Ting, Y, Rix, H et al. 2017, 'Masses and Ages for 230,000 LAMOST Giants, via Their Carbon and Nitrogen Abundances', The Astrophysical Journal, vol. 841, no. 1, pp. -.
- Ho, A, Rix, H, Ness, M et al. 2017, 'Masses and Ages for 230,000 LAMOST Giants, via Their Carbon and Nitrogen Abundances', The Astrophysical Journal, vol. 841, no. 1, pp. -.
- Ting, Y, Conroy, C, Rix, H et al. 2017, 'Prospects for Measuring Abundances of >20 Elements with Low-resolution Stellar Spectra', The Astrophysical Journal, vol. 843, no. 1, pp. 32 (26pp).
- Ting, Y, Rix, H, Conroy, C et al. 2017, 'Measuring 14 Elemental Abundances with R = 1800 LAMOST Spectra', Astrophysical Journal Letters, vol. 849, no. 1, pp. 6pp.
- Shabala, S, Deller, A, Kaviraj, S et al. 2016, 'Delayed triggering of radio Active Galactic Nuclei in gas-rich minor mergers in the local Universe', Monthly Notices of the Royal Astronomical Society, vol. 464, no. 4, pp. 4706-4720pp.
- Ting, Y, Conroy, C & Rix, H 2016, 'Accelerated fitting of Stellar spectra', The Astrophysical Journal, vol. 826, no. 1, pp. -.
- Ting, Y, Conroy, C & Rix, H 2016, 'APOGEE CHEMICAL TAGGING CONSTRAINT ON THE MAXIMUM STAR CLUSTER MASS IN THE alpha-ENHANCED GALACTIC DISK', The Astrophysical Journal, vol. 816, no. 1, pp. -.
- Ting, Y, Rix, H, Conroy, C et al. 2016, 'CONSTRUCTING POLYNOMIAL SPECTRAL MODELS for STARS', Astrophysical Journal Letters, vol. 826, no. 2, pp. -.
- Ting, Y, Conroy, C & Goodman, A 2015, 'PROSPECTS for CHEMICALLY TAGGING STARS in the GALAXY', The Astrophysical Journal, vol. 807, no. 1, pp. -.
- Davis, T, Rowlands, K, Allison, J et al. 2015, 'Molecular and atomic gas in dust lane early-type galaxies - I. Low star formation efficiencies in minor merger remnants', Monthly Notices of the Royal Astronomical Society, vol. 449, no. 4, pp. 3503-3516.
- De Silva, G, Freeman, K, Bland-Hawthorn, J et al. 2015, 'The GALAH survey: Scientific motivation', Monthly Notices of the Royal Astronomical Society, vol. 449, no. 3, pp. 2604-2617.
- Kaviraj, S, Rowlands, K, Alpaslan, M et al. 2013, 'A Herschel-ATLAS study of dusty spheroids: Probing the minor-merger process in the local Universe', Monthly Notices of the Royal Astronomical Society, vol. 435, no. 2, pp. 1463-1468.
- Ting, Y, Rix, H, Bovy, J et al. 2013, 'Constraining the Galactic potential via action-based distribution functions for mono-abundance stellar populations', Monthly Notices of the Royal Astronomical Society, vol. 434, no. 1, pp. 652-660.
- Kaviraj, S, Ting, Y, Bureau, M et al. 2012, 'Galaxy Zoo: Dust and molecular gas in early-type galaxies with prominent dust lanes', Monthly Notices of the Royal Astronomical Society, vol. 423, no. 1, pp. 49-58.
- Ting, Y, Freeman, K, Kobayashi, C et al. 2012, 'Principal component analysis on chemical abundances spaces', Monthly Notices of the Royal Astronomical Society, vol. 421, no. 2, pp. 1231-1255.
- Ting, Y, De Silva, G, Freeman, K et al. 2012, 'High-resolution elemental abundance analysis of the open cluster IC 4756', Monthly Notices of the Royal Astronomical Society, vol. 427, no. 1, pp. 882-892.
- Shabala, S, Ting, Y, Kaviraj, S et al. 2012, 'Galaxy Zoo: Dust lane early-type galaxies are tracers of recent, gas-rich minor mergers', Monthly Notices of the Royal Astronomical Society, vol. 423, no. 1, pp. 59-67.
Projects and Grants
Grants information is drawn from ARIES. To add or update Projects or Grants information please contact your College Research Office.
- A New Era of Galactic Archaeology with Large Surveys and Machine Learning (Primary Investigator)
