AS
Albert Sneppen
astro-ph.GAastro-ph.HEastro-ph.COastro-ph.SRastro-ph.IMgr-qcnucl-thphysics.ao-phphysics.atom-ph
On Valency
published · living versionsW_bkebnq87·v1 · currentpublished
UV spectra of little red dots: Broad-line N/C, gas recycling and black hole masses
with Darach Watson, Lucy R. Ivey, Kasper E. Heintz, Alex J. Cameron +6
1 version
Preprints & journals
43 papers in the corpus · 2021–2026Luminous Red Novae as shock-powered transients I: Electron-scattering wings and deviations from Case B2607.15390v1 · Albert Sneppen, Kenta Hotokezaka, Christopher M. Irwin2026 · 0 citationsarXiv
The metallicities of little red dot host galaxies: LRDs are metal poor, but not pristine2606.31515v1 · G.P. Nikopoulos, D. Watson, C.L. Pollock et al.2026 · 0 citationsarXiv
The nature of `little blue dots'2606.12509v2 · Albert Sneppen, Darach Watson, James H. Matthews et al.2026 · 0 citationsarXiv
Quenching of X-ray emission in little red dots by both Compton-thick gas and high accretion rates2605.15263v2 · Albert Sneppen, Darach Watson, James H. Matthews et al.2026 · 0 citationsarXiv
Paschen Jumps in Little Red Dots: Evidence for Nebular Continua2604.09399v1 · Albert Sneppen, James H. Matthews, Darach Watson et al.2026 · 0 citationsarXiv
Strontium and helium in the kilonova AT2017gfo: Origin of the 1{\mu}m feature constrained via NLTE calculations2604.05812v1 · Aayush Arya, Rasmus Damgaard, Albert Sneppen et al.2026 · 1 citationarXiv
A hot, nebular-dominated galaxy interacting with a pristine PopIII system uncovered by JWST2603.13471v2 · Henriette Reumert, Kasper E. Heintz, Clara L. Pollock et al.2026 · 0 citationsarXiv
Inside the cocoon: a comprehensive explanation of the spectra of Little Red Dots2601.18864v1 · A. Sneppen, D. Watson, J. H. Matthews et al.2026 · 0 citationsarXiv
Little red dots as young supermassive black holes in dense ionized cocoons.41535486 · Rusakov, V, Watson, D, Nikopoulos, G P et al.2026 · 77 citationsNature. 2026;649(8097):574-579
Spectroscopic characterization of a remarkable temporally varying, triple-lensed quasar at z=2.672512.10811v3 · Charlie Lind-Thomsen, Kasper E. Heintz, Albert Sneppen et al.2025 · 0 citationsarXiv
Electron impact excitation of Te IV and V and Level Resolved R-matrix Photoionization of Te I - IV with application to modelling of AT2017gfo2510.17357v1 · Leo P. Mulholland, Catherine A. Ramsbottom, Connor P. Ballance et al.2025 · 5 citationsarXiv
Light Travel Time Effects in Kilonova Models2510.09261v2 · F. McNeill, S. A. Sim, C. E. Collins et al.2025 · 2 citationsarXiv
Evidence for inefficient dust production in a massive, metal-rich galaxy at uncovered by JWST and ALMA2510.07936v2 · Kasper E. Heintz, Darach Watson, Francesco Valentino et al.2025 · 1 citationarXiv
Evidence of violation of Case B recombination in Little Red Dots2510.06362v1 · G. P. Nikopoulos, D. Watson, A. Sneppen et al.2025 · 6 citationsA&A 710, A136 (2026)
JWST Spectroscopy of GRB 250702B: An Extremely Rare and Exceptionally Energetic Burst in a Dusty, Massive Galaxy at 2509.22778v1 · Benjamin P. Gompertz, Andrew J. Levan, Tanmoy Laskar et al.2025 · 4 citationsarXiv
JWST reveals a supernova following a gamma-ray burst at z 7.32507.18784v1 · A. J. Levan, B. Schneider, E. Le Floc'h et al.2025 · 5 citationsA&A 704, L8 (2025)
The day-long, repeating GRB 250702BDE / EP250702a: A unique extragalactic transient2507.14286v1 · Andrew J. Levan, Antonio Martin-Carrillo, Tanmoy Laskar et al.2025 · 17 citationsarXiv
The optical constants and grain sizes of interstellar dust measured directly using the dust scattered x-ray halo of GRB 221009A2506.12125v1 · Albert Sneppen, Darach Watson2025 · 0 citationsA&A 701, A65 (2025)
A power spectral study of PHANGS galaxies with JWST MIRI: On the spatial scales of dust and PAHs2504.01060v1 · Charlie Lind-Thomsen, Albert Sneppen, Charles L. Steinhardt2025 · 5 citationsarXiv
Helium as an Indicator of the Neutron-Star Merger Remnant Lifetime and its Potential for Equation of State Constraints2411.03427v2 · Albert Sneppen, Oliver Just, Andreas Bauswein et al.2024 · 8 citationsarXiv
Helium features are inconsistent with the spectral evolution of the kilonova AT2017gfo2407.12907v2 · Albert Sneppen, Rasmus Damgaard, Darach Watson et al.2024 · 8 citationsA&A 692, A134 (2024)
A massive, neutral gas reservoir permeating a galaxy proto-cluster after the reionization era2407.06287v1 · Kasper E. Heintz, Jake S. Bennett, Pascal A. Oesch et al.2024 · 3 citationsarXiv
Emergence hour-by-hour of -process features in the kilonova AT2017gfo2404.08730v2 · Albert Sneppen, Darach Watson, Rasmus Damgaard et al.2024 · 19 citationsA&A 690, A398 (2024)
The JWST-PRIMAL Legacy Survey. A JWST/NIRSpec reference sample for the physical properties and Lyman- absorption and emission of galaxies at 2404.02211v1 · K. E. Heintz, G. B. Brammer, D. Watson et al.2024 · 115 citationsA&A 693, A60 (2025)
Kilonova evolution -- the rapid emergence of spectral features2312.02258v2 · Albert Sneppen, Darach Watson, James H. Gillanders et al.2023 · 8 citationsA&A 688, A95 (2024)
Efficient survey design for finding high-redshift galaxies with JWST2310.15284v1 · Luka Vujeva, Charles L. Steinhardt, Christian Kragh Jespersen et al.2023 · 9 citationsarXiv
Towards inferring the geometry of kilonovae2309.05579v2 · Christine E. Collins, Luke J. Shingles, Andreas Bauswein et al.2023 · 15 citationsarXiv
Discovery of a 760 nm P Cygni line in AT2017gfo: Identification of yttrium in the kilonova photosphere2306.14942v1 · Albert Sneppen, Darach Watson2023 · 45 citationsA&A 675, A194 (2023)
Measuring the Hubble constant with kilonovae using the Expanding Photosphere Method2306.12468v2 · Albert Sneppen, Darach Watson, Dovi Poznanski et al.2023 · 20 citationsA&A 678, A14 (2023)
A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function2306.12474v1 · Vadim Rusakov, Charles L. Steinhardt, Albert Sneppen2023 · 7 citationsarXiv
On the Blackbody Spectrum of Kilonovae2306.05452v2 · Albert Sneppen2023 · 10 citationsarXiv
The Highest-Redshift Balmer Breaks as a Test of CDM2305.15459v1 · Charles L. Steinhardt, Albert Sneppen, Thorbj\orn Clausen et al.2023 · 16 citationsarXiv
Spherical symmetry in the kilonova AT2017gfo/GW170817.36792736 · Sneppen, Albert, Watson, Darach, Bauswein, Andreas et al.2023 · 58 citationsNature. 2023;614(7948):436-439
The Earliest Stage of Galactic Star Formation2301.01774v2 · Charles L. Steinhardt, Vadim Rusakov, Thomas H. Clark et al.2023 · 4 citationsarXiv
COSMOS2020: The Galaxy Stellar Mass Function: the assembly and star formation cessation of galaxies at 2212.02512v2 · J. R. Weaver, I. Davidzon, S. Toft et al.2022 · 196 citationsA&A 677, A184 (2023)
Templates for Fitting Photometry of Ultra-High-Redshift Galaxies2208.07879v2 · Charles L. Steinhardt, Vasily Kokorev, Vadim Rusakov et al.2022 · 89 citationsarXiv
Implications of a Temperature Dependent IMF III: Mass Growth and Quiescence2206.01750v1 · Charles L. Steinhardt, Albert Sneppen, Hagan Hensley et al.2022 · 14 citationsarXiv
Implications of a Temperature Dependent IMF II: An Updated View of the Star-Forming Main Sequence2205.14161v1 · Charles L. Steinhardt, Albert Sneppen, Basel Mostafa et al.2022 · 22 citationsarXiv
Implications of a Temperature Dependent IMF I: Photometric Template Fitting2205.11536v1 · Albert Sneppen, Charles L. Steinhardt, Hagan Hensley et al.2022 · 33 citationsarXiv
The Power Spectrum of Climate Change2205.07908v1 · Albert Sneppen2022 · 5 citationsPublished in European Physical Journal Plus, 2022
COSMOS2020: A panchromatic view of the Universe to from two complementary catalogs2110.13923v1 · J. R. Weaver, O. B. Kauffmann, O. Ilbert et al.2021 · 481 citationsarXiv
Author Correction: Divergent reflections around the photon sphere of a black hole.34462523 · Sneppen, Albert2021 · 1 citationScientific reports. 2021;11(1):17654
Divergent reflections around the photon sphere of a black hole.34244573 · Sneppen, Albert2021 · 6 citationsScientific reports. 2021;11(1):14247
Career total: 61 works. 43 are in this corpus.
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