CH
C. Hawcroft
astro-ph.SRastro-ph.GAastro-ph.HEastro-ph.IMastro-ph.COastro-ph.EPphysics.gen-ph
On Valency
published · living versionsW_5s3a88bk·v1 · currentpublished
Is HR 6819 a triple system containing a black hole? – An alternative explanation
with J. Bodensteiner, T. Shenar, L. Mahy, M. Fabry +8
1 version
Preprints & journals
33 papers in the corpus · 2019–2026The Treasury of Extremely Metal-Poor O Stars2609.20928v1 · O. Grace Telford, Christiana Erba, Kristen B. W. McQuinn et al.2026 · 0 citationsarXiv
Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory2608.11294v1 · Courtney D. Dressing, Danica Adams, Evelyne Alecian et al.2026 · 0 citationsarXiv
Multiplicity of Massive Stars at Low Metallicity: Early Results from the BLOeM Campaign2607.27395v1 · T. Shenar, J. Bodensteiner, M. Abdul-Masih et al.2026 · 0 citationsThe Messenger (ESO), Vol. 196, pp. 15-19 (2026)
SpecFANN: Spectral Fitting via Artificial Neural Networks I. A deep learning based fastwind emulator and fitting suite2607.17348v1 · M. Abdul-Masih, C. Hawcroft, T. Lechien et al.2026 · 0 citationsarXiv
Stellar winds of O-type stars traced by high ionization fine-structure emission lines with JWST/MIRI2606.23456v1 · Calum Hawcroft, David R. Law, Linda J. Smith et al.2026 · 0 citationsarXiv
X-Shooting ULLYSES: Massive stars at low metallicity XV. On the metallicity dependence of B-supergiant mass-loss rates2604.21452v2 · O. Verhamme, J.O. Sundqvist, A. de Koter et al.2026 · 1 citationA&A 710, A166 (2026)
MXDFz4.4: A LyC emitter 250Myr after the epoch of reionization and a first test of Ly-alpha morphology as a tracer of LyC escape at high redshift2603.04517v2 · Ilias Goovaerts, Marc Rafelski, Alexander Beckett et al.2026 · 0 citationsarXiv
Echoes of the First Stars: Massive Star Evolution in Extremely Metal-Poor Environments with the Habitable Worlds Observatory2511.03715v1 · Peter Senchyna, Calum Hawcroft, Miriam Garcia et al.2025 · 0 citationsarXiv
Mass loading of outflows from evolving Young Massive Clusters2510.06100v1 · C. J. K. Larkin, C. Hawcroft, J. Mackey et al.2025 · 3 citationsA&A 703, L14 (2025)
A high fraction of close massive binary stars at low metallicity2509.12488v1 · H. Sana, T. Shenar, J. Bodensteiner et al.2025 · 26 citationsNature Astronomy (2025)
pySTARBURST99: The Next Generation of STARBURST992505.24841v1 · Calum Hawcroft, Claus Leitherer, Oskar Arangure et al.2025 · 12 citationsarXiv
X-Shooting ULLYSES: massive stars at low metallicity: XII. The clumped winds of O-type (super)giants in the Large Magellanic Cloud2503.14687v1 · Sarah A. Brands, Frank Backs, Alex de Koter et al.2025 · 8 citationsA&A 697, A54 (2025)
X-Shooting ULLYSES: Massive Stars at Low Metallicity: XI. Pipeline-determined Physical Properties of Magellanic Cloud OB Stars2501.17931v1 · J.M. Bestenlehner, P.A. Crowther, C. Hawcroft et al.2025 · 8 citationsA&A 695, A198 (2025)
X-Shooting ULLYSES: Massive stars at low metallicity VI. Atmosphere and mass-loss properties of O-type giants in the Small Magellanic Cloud2411.06884v1 · Frank Backs, S. A. Brands, A. de Koter et al.2024 · 0 citationsarXiv
JWST/MIRI detection of [Ne V], [Ne VI], and [O IV] wind emission in the O9V star 10 Lacertae2410.05469v3 · David R. Law, Calum Hawcroft, Linda J. Smith et al.2024 · 8 citationsarXiv
X-Shooting ULLYSES: Massive stars at low metallicity VII. Stellar and wind properties of B supergiants in the Small Magellanic Cloud2407.14216v1 · M. Bernini-Peron, A.A.C. Sander, V. Ramachandran et al.2024 · 0 citationsarXiv
Binarity at LOw Metallicity (BLOeM): a spectroscopic VLT monitoring survey of massive stars in the SMC2407.14593v3 · T. Shenar, J. Bodensteiner, H. Sana et al.2024 · 37 citationsA&A 690, A289 (2024)
Empirical mass-loss rates and clumping properties of O-type stars in the LMC2407.06775v1 · C. Hawcroft, L. Mahy, H. Sana et al.2024 · 16 citationsA&A 690, A126 (2024)
Spectroscopic characterisation of gravitationally lensed stars at high redshifts2404.10817v2 · Emma Lundqvist, Erik Zackrisson, Calum Hawcroft et al.2024 · 4 citationsA&A 690, A291 (2024)
X-Shooting ULLYSES: Massive Stars at low metallicity II. DR1: Advanced optical data products for the Magellanic Clouds2402.16987v1 · H. Sana, F. Tramper, M. Abdul-Masih et al.2024 · 22 citationsA&A 688, A104 (2024)
X-Shooting ULLYSES: massive stars at low metallicity. I. Project Description2305.06376v3 · Jorick S. Vink, A. Mehner, P.A. Crowther et al.2023 · 63 citationsA&A 675, A154 (2023)
X-Shooting ULLYSES: Massive stars at low metallicity. III. Terminal wind speeds of ULLYSES massive stars2303.12165v2 · C. Hawcroft, H. Sana, L. Mahy et al.2023 · 44 citationsA&A 688, A105 (2024)
The Nature of Unseen Companions in Massive Single-Line Spectroscopic Binaries2209.06287v1 · Hugues Sana, Michael Abdul-Masih, Gareth Banyard et al.2022 · 0 citationsarXiv
An X-ray quiet black hole born with a negligible kick in a massive binary within the Large Magellanic Cloud2207.07675v1 · Tomer Shenar, Hugues Sana, Laurent Mahy et al.2022 · 100 citationsarXiv
Identifying quiescent compact objects in massive Galactic single-lined spectroscopic binaries2207.07752v1 · L. Mahy, H. Sana, T. Shenar et al.2022 · 82 citationsarXiv
HR 6819 is a binary system with no black hole -- revisiting the source with infrared interferometry and optical integral field spectroscopy2203.01359v1 · A. J. Frost, J. Bodensteiner, Th. Rivinius et al.2022 · 32 citationsA&A, Volume 659, March 2022, L3, 12, Letters to the Editor
The R136 star cluster dissected with Hubble Space Telescope/STIS. III. The most massive stars and their clumped winds2202.11080v1 · Sarah A. Brands, Alex de Koter, Joachim M. Bestenlehner et al.2022 · 121 citationsA&A 663, A36 (2022)
Empirical mass-loss rates and clumping properties of Galactic early-type O supergiants2108.08340v1 · C. Hawcroft, H. Sana, L. Mahy et al.2021 · 51 citationsA&A 655, A67 (2021)
Resolving the dynamical mass tension of the massive binary 9 Sagittarii2105.09968v1 · M. Fabry, C. Hawcroft, A. J. Frost et al.2021 · 14 citationsA&A 651, A119 (2021)
Characterization of the variability in the O+B eclipsing binary HD 1652462102.08391v1 · Cole Johnston, Nicolas Aimar, Michael Abdul-Masih et al.2021 · 18 citationsarXiv
Is HR 6819 a triple system containing a black hole? -- An alternative explanation2006.10770v1 · J. Bodensteiner, T. Shenar, L. Mahy et al.2020 · 109 citationsA&A 641, A43 (2020)on Valency
The 'hidden' companion in LB-1 unveiled by spectral disentangling2004.12882v2 · T. Shenar, J. Bodensteiner, M. Abdul-Masih et al.2020 · 132 citationsA&A 639, L6 (2020)
On the signature of a 70-solar-mass black hole in LB-1.32350474 · Abdul-Masih, Michael, Banyard, Gareth, Bodensteiner, Julia et al.2021 · 73 citationsNature. 2020;580(7805):E11-E15
Career total: at least 66 works. 33 are in this corpus.
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