Hey, hola.
I am Justus Neumann
I am an observational astronomer researching the evolution of galaxies. Currently, I am a postdoc in the Galaxy and Cosmology department of the Max-Planck Institute for Astronomie (MPIA) in Heidelberg, Germany, working in the Extragalactic Star Formation group led by Dr. Eva Schinnerer.
Science
Through my research, I explore how galaxy structures, such as bars and spirals, shape the distribution of stars and gas and drive the chemical evolution in galaxies. By exploring state-of-the-art IFU observations, I investigate the intricate processes driving star formation and morphological evolution. My work sheds light on the links between bar dynamics and stellar populations, contributing to our understanding of galaxy evolution across cosmic time.
Latest publications
Total publications: 63
All refereed publications:
Justus Neumann – ADS Publication Library
Azimuthal Variations of Stellar Populations in Barred Galaxies
We investigate the azimuthal variations of stellar populations in a sample of 1,000 barred galaxies from the MaNGA survey. We find that bars are of higher stellar mass density and are more metal-rich than the inner discs at the same radii. The differences increase with total stellar mass of the galaxy and distance below the star-forming main sequence. Stellar ages show a variety of bar to inter-bar contrasts, with no consistent trend.
Verwilghen, E. Emsellem, F. Renaud et al. inc. J. Neumann, Simulating nearby disc galaxies on the main star formation sequence II. The gas structure transition in low and high stellar mass discs, A&A, 700, A3, Aug 2025
Ramambason, M. Chevance, J. Kim et al. inc. J. Neumann, Duration and properties of the embedded phase of star formation in 37 nearby galaxies from PHANGS-JWST, A&A, in press, 2025 (arXiv:2507.01508)
Maraston, M. Limongi, J. Neumann et al., Stellar population modelling of neutron stars and black holes: spatially resolved graveyards in MaNGA/SDSS-IV galaxies, MNRAS, 540, 2359-2376, July 2025
Kolcu, M.C. Sormani, W. Maciejewski et al. inc. J. Neumann, Extreme cloud collisions in nearby barred galaxies, MNRAS, tmp, 1035, July 2025
L.A. Silva-Lima, D.A. Gadotti, L.P. Martins, et al. inc. J. Neumann, Optimizing the analysis of emission lines in galaxies: the case of the MUSE TIMER galaxy NGC 613, MNRAS, 540, 2787-2809, July 2025
Winkel, K. Jahnke, J.A. Fernández-Ontiveros et al. inc. J. Neumann, Gravitational Torques from a Lopsided Young Stellar Component Sustain High Black Hole Accretion in NGC 4593, A&A, in press, 2025 (arXiv:2506.19902)
de Sá-Freitas, D.A. Gadotti, F. Fragkoudi, et al. inc. J. Neumann, Bar ages derived for the first time in nearby galaxies: Insights into secular evolution from the TIMER sample, A&A, 698, 18, June 2025
Chandar, A.T. Barnes, D.A. Thilker et al. inc. J. Neumann, The PHANGS-HST-Hα Survey: Warm Ionized Gas Physics at High Angular Resolution in Nearby Galaxies with the Hubble Space Telescope, AJ, 169, 150, March 2025
Neumann, D. Thomas, C. Maraston et al., Azimuthal variations of stellar populations in barred galaxies, MNRAS, 534, 2438-2457, Nov 2024
C. Eibensteiner, J. Sun, F. Belgien et al. inc. J. Neumann, PHANGS-MeerKAT and MHONGOOSE HI observations of nearby spiral galaxies: Physical drivers of the molecular gas fraction, R_mol, A&A, 691, 163, Nov 2024