Curriculum Vitae

I study how massive stars and stellar clusters assemble their mass – from parsec-scale gas flows to accretion onto individual protostellar cores – and how these flows interact with stellar feedback.

I study how the biggest, brightest stars and the star clusters around them keep growing – tracing the gas as it falls in from far outside the cluster all the way down onto the stars themselves, and seeing how that changes once the stars switch on and start blasting the surrounding gas with light.

I study how really, really big stars are born. They start as huge clouds of gas, and the gas slowly falls together to build the star, like water swirling down a drain. I want to know what happens to that gas once the star turns on and starts shining really brightly.

Download full CV (PDF)
Portrait of Lennart Böhm.

Positions

2026 – 2027

Predoctoral Fellow

Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA

Supported by a DAAD Research Grant

A one-year research stay in the US, funded by a German academic exchange grant, working alongside the Center for Astrophysics team.

I get to go work with scientists in America for a year, and a special grant from Germany pays for it!

2024 – present

PhD Researcher

European Southern Observatory, Garching

Expected completion April 2028

Doing my PhD research at one of the world’s leading astronomy organisations, expected to finish in 2028.

I'm doing my big science project (it's called a PhD!) at a place where lots of astronomers work together, and I should finish around 2028.

2023

Master student / intern, Menten group (Millimetre and Submillimetre Astronomy)

Max Planck Institute for Radio Astronomy, Bonn

A research internship during my Master’s, working with a radio-astronomy research group.

I got to try out being a real scientist for a while, working with a team that studies space using giant radio dishes.

2018 – 2024

University Teaching Assistant

University of Bonn

Scientific programming in Python, astrophysics labs and lectures

Helped teach university students computer programming and astrophysics, alongside my own studies.

I helped teach other students how to use computers for science and how space works.

Education

2025 – present

PhD Candidate

Ludwig-Maximilians-Universität München (LMU Munich)

Working dissertation title: Multi-scale ACcretion aNd Ionising Feedback in a Young cluster (MACNIFY)

Officially enrolled as a PhD student at a university in Munich, while doing the actual day-to-day research at ESO.

I'm signed up at a university in Munich to get my big science diploma, even though I do most of my actual work somewhere else.

2022 – 2024

M.Sc. Astrophysics, with honours

Rheinische Friedrich-Wilhelms-Universität Bonn

Thesis: Investigating chlorine chemistry through observations of HCl in star-forming regions

Earned my Master’s degree studying the universe, graduating with honours for a thesis on chlorine chemistry in space.

I got a big diploma for studying space, and I did extra well on my final project about a chemical called chlorine in space clouds.

2017 – 2021

B.Sc. Physics

Rheinische Friedrich-Wilhelms-Universität Bonn

Thesis: Origin and evolution of counter-rotating stars in simulated galaxies

My undergraduate degree in physics, with a final project on stars that orbit the "wrong way" in simulated galaxies.

My first science diploma was in physics. For my final project, I studied pretend galaxies on a computer where some stars spin backwards!

2016 – 2017

Business Administration studies

Universität zu Köln

Left after one year to pursue physics

Started out studying business, then switched to physics after a year once I realised where my real interest was.

I first tried studying business, but I missed science too much, so I switched to physics instead!

PI-led observing programs

FacilityProposalTime awarded
ALMA

2025.1.01454.S (2025) – From filaments to cores: tracing multi-scale accretion in W33 Main

Using a powerful telescope array in Chile to zoom in on gas falling onto individual forming stars.

Using giant telescopes in the desert to watch gas fall right onto baby stars.

~10 h
SMA

2025B-S036 (2025) – Magnetic fields driving or resisting OB cluster formation in the hub-filament system W33 Main

Checking whether invisible magnetic fields are helping or hindering a young star cluster’s growth.

Finding out if invisible magnetic forces are helping or stopping a star cluster from growing.

1 night
APEX

M9517C_114 (2024) – Constraining the HCl absorption towards the nearby galaxy NGC 4945

Measuring a specific gas’s fingerprint in the dense centre of a nearby galaxy.

Looking for a special gas clue in the middle of a galaxy far, far away.

~18 h
APEX

M9521C_114 (2024) – Mapping the extent of HCl emission in the explosive outflow of IRAS 12326−6245

Mapping exactly where that same gas shows up in the aftermath of a rare stellar collision.

Finding out exactly where that gas clue appears after a dramatic star crash.

~6 h

Selected talks & awards

A selection only – the complete list of conferences, schools, and seminars is in the downloadable CV.

Jan 2027

DAAD Research Grant for Doctoral Researchers

Germany

Nov 2026

IAU Symposium 412: Hub-Filament Structures in Star Formation

Mysuru, India – Contributed talk, supported by an IAU Travel Grant

Oct 2026

SAO Predoctoral Fellowship

Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA, USA

May 2026

Poster Award, The Olympian Symposium 2026

Paralia Katerini, Greece

Dec 2025

Seminar talk, Jodrell Bank Centre for Astrophysics / UK ALMA Regional Centre

University of Manchester, United Kingdom

Sept 2025

Stellar Origins 2025

Vienna, Austria – Contributed talk

Nov 2024

Fractionation of Isotopes in Space II

Arcetri, Florence, Italy – Contributed talk

Outreach & service

2026

Stellar Nursery — browser game

Play it: a short game about how massive stars actually gain their mass

Built from the same literature behind my research, compressed into something playable

A small browser game that turns the real mechanisms behind massive star formation into something playable — the same science as the research above, just with a score attached.

A game I made about how giant stars are born — you get to be the star and decide how to keep pulling in gas!

2026 – present

Volunteer tutor

Lern-Fair e.V.

One-to-one tutoring for school students

Free one-to-one tutoring for school students who need some extra support.

I help kids with their homework for free, one-on-one.

2022 – present

Student representative

ESO, IMPRS-Astro, previously AIfA Bonn

Represents fellow PhD students’ interests and concerns to the institutes and graduate school.

I'm like a class president for the other student scientists, speaking up for them.

2024 – present

Local organising committee member

Multiple ESO workshops and conferences

Helps plan and run scientific workshops and conferences.

I help organise big meetings where scientists from all over come to share what they’ve found.

Sep 2019

Science fair host

Highlights der Physik 2019, University of Bonn

Hosted a public physics exhibit at Germany’s largest science outreach festival.

I helped run a fun physics show for the public, with cool experiments and demonstrations.

Beyond the lab

Outside astronomy, I'm usually cycling, hiking, or running – and always up for trivia, especially anything to do with music, movies, and cinema history.

I also volunteer as a tutor with Lern-Fair e.V.

Lennart Böhm on a high-altitude mountain viewing platform, snow-covered peaks in the background.
Lennart Böhm at the start line of a road cycling race, wearing a helmet and team jersey.