WH
Willem Hoogendam
astro-ph.HEastro-ph.SRastro-ph.GAastro-ph.EPastro-ph.COastro-ph.IM
On Valency
published · living versionsW_qhhkepcy·v1 · currentpublished
Early panchromatic spectra reveal helium in the thermonuclear supernova 2024kce
with Abigail Polin, Dillon Hasenour, Sahana Kumar, Jing Lu +24
1 version
W_etsugq2h·v1published
W_u6phneua·v1published
W_cgfrx5za·v1published
Preprints & journals
67 papers in the corpus · 2020–2026Constraints on the Progenitor of SN 2023bee from its Nebular-Phase Spectra2610.25674v1 · Sophie von Coelln, Qinan Wang, Matthew R. Siebert et al.2026 · 0 citationsarXivon Valency
Flashing with colours: Photometric indicators of an early interaction in type II supernovae2610.23852v1 · A. Mendez-Llorca, G. Folatelli, C.P. Gutierrez et al.2026 · 0 citationsarXiv
The nearby Type II supernova 2024ggi beyond 600 days: circumstellar interaction and dust formation2610.17140v1 · L. Ferrari, G. Folatelli, C. P. Guti'errez et al.2026 · 0 citationsarXiv
Extreme Stellar Death and Galaxy Feedback at z = 2: A Rest-frame Ultraviolet Characterization of the Strongly Lensed Superluminous Supernova 2025wny2610.08903v1 · Willem B. Hoogendam, David O. Jones, Christopher J. Storfer et al.2026 · 0 citationsarXiv
SN2025aico: An Interesting Case Of Ni Mixing, Ejecta Asymmetries, and Dust Formation in a Type IIb Supernova2609.26935v1 · Grace Davis, Kyle Medler, Chris Ashall et al.2026 · 0 citationsarXiv
Nebular Spectra of the Extremely Metal-Poor SN II 2023ufx Over a Year After Explosion: A Massive Progenitor and Unique Circumstellar Environment2609.04307v1 · Evan Jennerjahn, Michael A. Tucker, Christopher S. Kochanek et al.2026 · 0 citationsarXiv
The host galaxies of 2003fg-like type Ia supernovae2608.26281v1 · Llu'is Galbany, Chris Ashall, Jing Lu et al.2026 · 0 citationsarXiv
A Two-month, Galaxy-targeted NIR Follow-up of the Sub-solar-mass Gravitational Wave Candidate S251112cm: Probing Electromagnetic Counterpart Scenarios2608.22775v1 · Gregory S. H. Paek, Felipe Olivares E., Willem B. Hoogendam2026 · 0 citationsarXiv
Panchromatic JWST Observations and Models of the Dim Type Iax Supernova 2024vjm at 200 days2608.15040v1 · E Baron, J. M. DerKacy, C. Ashall et al.2026 · 0 citationsarXiv
JWST Spectroscopy of Type Ia Supernova 2025rbs from Maximum Light to the Nebular Phase2608.10451v1 · Lindsey A. Kwok, St'ephane Blondin, Adam A. Miller et al.2026 · 0 citationsarXiv
ATLAS22kjn (AT 2022fpx): A Coronal Line Emitter with an Early Light Curve Bump and Mid-Infrared Dust Echo2608.11300v1 · Athena C. Engholm, Jason T. Hinkle, Benjamin J. Shappee et al.2026 · 0 citationsarXiv
AT2021yky: A Fast-Rising Optical Transient with Evolving Broad Hydrogen Emission Consistent with an Ambiguous Nuclear Transient2608.06462v1 · Paarmita Pandey, Jason T. Hinkle, Christopher Kochanek et al.2026 · 0 citationsarXiv
SN 2025aico: Early observations of a faint Type IIb supernova with a low-mass envelope2607.10671v1 · J.-W. Zhao, A. Pastorello, B. Kumar et al.2026 · 0 citationsarXiv
The type Ia supernova 2023vjh: a peculiar 1991bg-like SN with unusually faint light curves2607.08821v1 · M. Kopsacheili, L. Galbany, G. Folatelli et al.2026 · 0 citationsarXiv
JWST Medium-Resolution Infrared Spectroscopy of SN 2022acko: Tracing Molecule Formation in the Nebular Phase2606.31176v1 · K. Medler, T. Mera, C. Ashall et al.2026 · 0 citationsarXiv
Can Asteroseismic Structure Inversions Be Performed in Structure-Dependent Coordinates?2606.25243v1 · J. M. Joel Ong, Sarbani Basu, Willem Hoogendam et al.2026 · 0 citationsarXiv
Discovery and Analysis of a Type II Supernova Candidate at z = 3.19 from JWST's COSMOS-Web Survey2605.24088v1 · Valeria Aparicio, David O. Jones, Willem B. Hoogendam et al.2026 · 0 citationsarXiv
SCAT Data Release 1: 1812 optical spectra of 1331 transients2604.23794v3 · Michael A. Tucker, Mark E. Huber, Benjamin J. Shappee et al.2026 · 0 citationsarXiv
Probing the 3D Structures of Supernovae through IR Signatures of CO and SiO2604.18339v2 · T. Mera, P. Hoeflich, C. R. Burns et al.2026 · 0 citationsarXiv
Supernova 2025wny: High-angular resolution Keck/NIRC2 observations and preliminary lens modeling2604.02418v1 · Christopher J. Storfer, Kenneth C. Wong, Ana Acebron et al.2026 · 0 citationsarXiv
ASAS-SN Rates IV: Constraints on the Kilonova Rate2603.26871v1 · Dhvanil D. Desai, Benjamin J. Shappee, Christopher S. Kochanek et al.2026 · 0 citationsarXiv
Contemporaneous Optical and Near-Infrared Observations of the Interstellar Comet 3I/ATLAS Pre- and Post-Perihelion2602.23586v1 · Kyle Medler, Willem B. Hoogendam, Christopher Ashall et al.2026 · 0 citationsarXiv
AT 2024ahzi: A Type IIP Supernova Discovered by the LSST Commissioning Camera2603.00262v1 · Kaylee de Soto, V. Ashley Villar, Jared A. Goldberg et al.2026 · 0 citationsarXiv
The Enigmatic Type Icn Supernova 2024abvb Located ~22 kpc from Its Host Galaxy2602.16227v1 · J. Shi, K. Auchettl, W. B. Hoogendam et al.2026 · 0 citationsarXiv
Pre-perihelion Emergence of the CN Gas Coma in 3I/ATLAS Temporally and Spatially Resolved by the 7-Dimensional Telescope2602.12930v1 · Gregory S. H. Paek, Myungshin Im, Mankeun Jeong et al.2026 · 2 citationsarXiv
BlastBerries: How Supernovae Affect Lyman Continuum Escape Fractions and Ionizing Photon Production in Local Analogs of High-Redshift Galaxies2602.11261v1 · Miranda Y. Kong, David O. Jones, Nicole E. Drakos et al.2026 · 0 citationsarXiv
Filling The Pockets: The Spherical Nature of 3D Deflagration in Thermonuclear Supernovae2602.11341v2 · S. Shiber, P. Hoeflich, T. Mera et al.2026 · 0 citationsarXiv
Supernova Rates and Luminosity Functions from ASAS-SN III: Over a Decade of Type Ia SNe and Their Subtypes2602.00223v1 · Dhvanil D. Desai, Benjamin J. Shappee, Christopher S. Kochanek et al.2026 · 0 citationsarXiv
Post-Perihelion Integral Field Spectroscopy of the Interstellar Comet 3I/ATLAS2601.16983v1 · Willem B. Hoogendam, David O. Jones, Bin Yang et al.2026 · 0 citationsarXiv
The hydrogen-free circumstellar interaction in the Type Ib supernova 2021efd: A clue to the mechanism of the helium-layer stripping2512.11447v1 · N. Pyykkinen, T. Nagao, H. Kuncarayakti et al.2025 · 2 citationsarXiv
University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months from Discovery2512.09020v2 · W. B. Hoogendam, D. Kuesters, B. J. Shappee et al.2025 · 1 citationarXiv
The broad-lined type Ic supernova 2020lao experienced an energetic explosion with no central-engine signatures2512.03716v2 · M. D. Stritzinger (Aarhus), T. J. Moriya, S. Bose et al.2025 · 0 citationsA&A 708, A305 (2026)
JCMT Constraints on the Early-Time HCN and CO Emission and HCN Temporal Evolution of 3I/ATLAS2512.02106v3 · Jason T. Hinkle, Bin Yang, Karen J. Meech et al.2025 · 0 citationsarXiv
Normal or transitional? The evolution and properties of two type Ia supernovae in the Virgo cluster2512.00555v1 · L. Izzo, C. Gall, N. Khetan et al.2025 · 1 citationarXiv
Characterization of type Ibn SNe2511.12362v1 · D. Farias, C. Gall, V. A. Villar et al.2025 · 4 citationsA&A 708, A270 (2026)
The Type Ia Supernova 2021hem: A 2003fg-like Event in an Apparently Hostless Environment2511.07529v2 · Subhash Bose, M.D. Stritzinger, A. Malmgaard et al.2025 · 2 citationsarXiv
Spectral Diversity in Type Ibn Supernovae and the Large Host Offset of SN2024acyl2511.03926v2 · Yize Dong, V. Ashley Villar, Anya Nugent et al.2025 · 0 citationsarXiv
Spatial Profiles of 3I/ATLAS CN and Ni Outgassing from Keck/KCWI Integral Field Spectroscopy2510.11779v3 · W. B. Hoogendam, B. J. Shappee, J. J. Wray et al.2025 · 4 citationsarXiv
JWST Observations of SN 2024ggi II: NIRSpec Spectroscopy and CO Modeling at 285 and 385 Days Past the Explosion2510.09600v4 · T. Mera, C. Ashall, P. Hoeflich et al.2025 · 0 citationsarXiv
Unraveling the Nature of the Nuclear Transient AT2020adpi2509.03593v3 · Paarmita Pandey, Jason Hinkle, Christopher Kochanek et al.2025 · 0 citationsarXiv
The New Status Qvo? SN 2021qvo is Another 2003fg-like Type Ia Supernova with a Rising Light-Curve Bump2508.13263v4 · I. A. Abreu Paniagua, W. B. Hoogendam, D. O. Jones et al.2025 · 1 citationThe Astrophysical Journal, Volume 997, 2026, Number 2on Valency
The nebular phase of SN 2024ggi: a low-mass progenitor with no signs of interaction2507.22794v2 · L. Ferrari, G. Folatelli, K. Ertini et al.2025 · 5 citationsA&A 703, A12 (2025)
JWST Observations of SN 2023ixf II: The Panchromatic Evolution Between 250 and 720 Days After the Explosion2507.19727v1 · K. Medler, C. Ashall, P. Hoeflich et al.2025 · 10 citationsarXiv
JWST Observations of SN 2024ggi I: Interpretation and Model Comparison of the Type II Supernova 2024ggi at 55 days Past Explosion2507.18753v2 · E. Baron, C. Ashall, J. M. DerKacy et al.2025 · 6 citationsarXiv
JWST Observations of SN 2023ixf I: Completing the Early Multi-Wavelength Picture with Plateau-phase Spectroscopy2507.18785v2 · J. M. DerKacy, C. Ashall, E. Baron et al.2025 · 0 citationsarXiv
Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS2507.02757v3 · Darryl Z. Seligman, Marco Micheli, Davide Farnocchia et al.2025 · 83 citationsarXiv
ASASSN-24fw: An 8-month long, 4.1 mag, optically achromatic and polarized dimming event2507.03080v2 · R. For'es-Toribio, B. JoHantgen, C. S. Kochanek et al.2025 · 3 citationsarXiv
The most energetic transients: Tidal disruptions of high-mass stars.40465727 · Hinkle, Jason T, Shappee, Benjamin J, Auchettl, Katie et al.2026 · 9 citationsScience advances. 2025;11(23):eadt0074
The Hawaii Infrared Supernova Study (HISS): Spectroscopic Data Release 12505.18507v1 · K. Medler, C. Ashall, M. Shahbandeh et al.2025 · 4 citationsarXiv
Early and Extensive Ultraviolet Through Near Infrared Observations of the Intermediate-Luminosity Type Iax Supernovae 2024pxl2505.04610v3 · W. B. Hoogendam, C. Ashall, D. O. Jones et al.2025 · 15 citationsarXivon Valency
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