I am interested in a variety of topics in star formation. Primarily, 

• The formation of massive stars and massive star clusters.
• How stellar feedback — the injection of energy and momentum from young stars into the interstellar medium — limits star formation and affects the dynamics of HII regions.
• Star cluster disruption and its dependence on total stellar mass.
• How stellar feedback drives turbulence in the interstellar medium and may trigger future star formation.

The goal of my research is to understand which stellar feedback processes dominate the star formation process for massive stars and massive star clusters, and to determine how feedback from the most massive stars in these clusters can limit star formation and may lead to the cluster’s ultimate disruption. I develop new numerical methods and perform simulations using the three-dimensional radiation-magnetohydrodynamics (RMHD) adaptive mesh refinement code ORION2 and the STARFORGE framework, based on the mesh-less GIZMO RMHD code, to work on these problems.

Link to my google scholar page

Link to my ADS Library

Referred publications

1. “A Massive Star is Born: How Stellar Feedback from Stellar Winds, Radiation Pressure, and Collimated Outflows Limits Accretion onto Massive Stars”, Rosen, A.L., submitted to The Astrophysical Journal
2. “Cluster assembly and the origin of mass segregation in the STARFORGE simulations”, Guszejnov, D., Markey, C., Offner, S.S.R., Grudic, M.Y, Faucher-Giguere, C., Rosen, A.L., Hopkins, P.F., submitted to Monthly Notices of the Royal Astronomical Society
3. “The dynamics and outcome of star formation with jets, radiation, winds, and supernovae in concert”, Grudic, M.Y., Guszejnov, D., Offner, S.S.R, Rosen, A.L., Raju, A.N., Faucher-Giguere, C., Hopkins, P.F., 2022, Monthly Notices of the Royal Astronomical Society, 512, 216
4. “Less wrong: a more realistic initial condition for simulations of turbulent molecular clouds”, Lane, H.B., Grudic, M.Y., Guszejnov, D., Offner, S.S.R, Faucher-Giguere, C., Rosen, A.L., 2022, Monthly Notices of the Royal Astronomical Society, 510, 4767
5. “ORION2: A magnetohydrodynamics code for star formation”, Li, P.S., Cunningham, A.J., Gaches, B.L., Klein, R.I., Krumholz, M.R., Lee, A.T, McKee, C.F., Offner, S.S.R., Rosen, A.L., Skinner, M.A.; 2022, Journal of Open Source Software
6. “The Effects of Magnetic Fields and Outflow Feedback on the Shape and Evolution of the Density PDF in Turbulent Star-Forming Clouds”, Appel, S.M., Burkhart, B., Semenov, V.A., Federrath, C., Rosen, A.L., 2022, The Astrophysical Journal, 927, 75
7. “Blowing Bubbles around Intermediate-Mass Stars: Feedback from Main-sequence Winds is not Enough”, Rosen, A.L., Offner, S.S.R., Foley, M.M., Lopez, L.A., submitted to The Astrophysical Journal
8. “Dust in the Wind with Resonant Drag Instabilities: I. The Dynamics of Dust-Driven Outflows in GMCs and HII Regions”, Hopkins, P.F., Rosen, A.L., Squire, J., Panopoulou, G.V., Soliman, N.H., Seligman, D., Steinwandel, U.P., submitted to Monthly Notices of the Royal Astronomical Society
9. “Observations of the Ag(3×1) Phase on Ge(111)”, Mullet, C.H., Rosen, A.L.,  Chiang, S., Journal of Vacuum Science & Technology A, 39, Issue 5
10. “Evolution of Stellar Feedback in Hii Regions”, Olivier, G.M., Lopez, L.A., Rosen, A.L., Nayak, O., Reiter, M., Krumholz, M.R., Bolatto, A.D., Astrophysical Journal, 908, 68
11. “Continuity of Accretion from Clumps to Class 0 High-Mass Protostars”, Avison A., Fuller, G.A., Peretto, N. Duarte-Cabrel, A., Rosen, A.L., Traficante, A., Pineda, J.E., Güsten, R., & Cunningham, N., Astronomy & Astrophysics, 645, A142
12. “Winds in Star Clusters Drive Kolmogorov Turbulence“, Gallegos-Garcia, M., Burkhart, B., Rosen, A.L., Naiman, J.P., Ramirez-Ruiz, E., 2020, Astrophysical Journal Letters, 899, 30
13. “The Role of Outflows, Radiation Pressure, and Magnetic Fields in Massive Star Formation“, Rosen, A.L. and Krumholz, M.R., 2020, Astronomical Journal, 168, 78
14. “Zooming in on Individual Star Formation: Low- and High-mass Stars”, Rosen, A.L., Offner, S.S.R., Sadavoy, S.I, Vasquez-Semadani, E., Ginsburg, A., 2020, Space Science Reviews
15. “Formation and Evolution of Disks Around Young Stellar Objects”, Zhao, B, Tomida, K, Hennebelle, P., Tobin, J.J., Maury, A., Hirota, T., Sanchez-Monge, A., Kuiper, R., Rosen, A., Bhandare, A., Padovani, M., Lee, Y.,  2020, Space Science Reviews, 216, 43
16. “Circumbinary Disks: Accretion and Torque as a Function of Mass Ratio and Disk”, Duffell, P.C., D’Orazio, D., Derdzinski, A., Haiman, Z., MacFayden, A., Rosen, A.L., & Zrake, J., 2019, Astrophysical Journal, 901, 25
17. “Massive Star Formation via the Collapse of Subvirial and Virialized Turbulent Massive Cores”, Rosen, A.L., Li, P.S., Zhang, Q., Burkhart, B, 2019, The Astrophysical Journal, 887, 108, NASA ADS
18. unyt: Handle, manipulate, and convert data with units in Python, Goldbaum, N.J., ZuHone, J.A., Turk, M.J., Kowalik, K., Rosen, A.L, 2018, Journal of Open Source Software, 3, 28, 809, NASA ADS
19. “Hybrid Adaptive Ray-Moment Method (HARM2): A Highly Parallel Method for Radiation Hydrodynamics on Adaptive Grids”, Rosen, A.L., Krumholz, M.R., Oishi, J.S., Lee, A.T., & Klein, R.I., 2017,  Journal of Computational Physics,  NASA ADS
20. “An Unstable Truth: How Massive Stars get their Mass”, Rosen, A.L., Krumholz, M.R., McKee, C.F., & Klein, R.I., 2016, Monthly Notices of the Royal Astronomical Society, 463, 2553, NASA ADS
21. “Gone with the Wind: Where is the Missing Wind Energy from Massive Star Clusters?”, Rosen, A.L., Lopez, L.A., Krumholz, M.R., & Ramirez-Ruiz, E., 2014, Monthly Notices of the Royal Astronomical Society, 442, 2701, NASA ADS
22. “What Sets the Initial Rotation Rates of Massive Stars?”, Rosen, A.L., Krumholz, M.R., & Ramirez-Ruiz, E., 2012, The Astrophysical Journal, 745, 145, NASA ADS