HF
Helmut Feuchtgruber
astro-ph.IMastro-ph.GAastro-ph.EPastro-ph.SRastro-phgr-qcastro-ph.COastro-ph.HEPlanetsExtraterrestrial Environment
On Valency
published · living versionsW_jc8878c3·v1 · currentpublished
Improving constraints on the extended mass distribution in the Galactic Center with stellar orbits
with The GRAVITY Collaboration, Karim Abd El Dayem, Roberto Abuter, Nicolas Aimar +64
1 version
W_zsbj3yqg·v1published
Preprints & journals
73 papers in the corpus · 1997–2026Dual and lensed AGN at sub-arcsecond separations uncovered by ERIS2610.27086v1 · M. V. Zanchettin, F. Mannucci, Q. D'Amato et al.2026 · 0 citationsarXiv
A first look at the protoplanet WISPIT 2 b with VLTI/GRAVITY+2610.21629v1 · K. Abd El Dayem, R. Abuter, N. Aimar et al.2026 · 0 citationsarXiv
Searching for Nearby Supermassive Black Hole Binaries with GRAVITY2610.14174v1 · K. Abd El Dayem, N. Aimar, A. Berdeu et al.2026 · 0 citationsarXiv
Improving constraints on the Yukawa correction at the Galactic Center with multiple stellar orbits2609.07693v2 · K. Abd El Dayem, N. Aimar, A. Berdeu et al.2026 · 0 citationsarXiv
Discovery of a star sensitive to the spin of Sagittarius A.42618794 · Abd El Dayem, K, Abuter, R, Aimar, N et al.2026 · 4 citationsNature. 2026;657(8131):359-363
GRAVITY+: reducing non-common-path aberrations for sub-10 {\mu}as astrometric accuracy2608.05751v1 · Quentin Fournier, Guillaume Bourdarot, Frank Eisenhauer et al.2026 · 0 citationsarXiv
Discovery of a star sensitive to the spin of Sgr A*2607.12664v1 · K. Abd El Dayem, R. Abuter, N. Aimar et al.2026 · 1 citationarXivon Valency
Using VLTI/GRAVITY+ to determine the identity of a third planet candidate in the PDS 70 system2606.26249v2 · David Trevascus, Wolfgang Brandner, Olga Balsalobre-Ruza et al.2026 · 1 citationarXiv
Direct Imaging Discovery of Giant Exoplanet Pictoris d: A Decade-Long Game of Hide-and-Seek2606.23801v2 · Ben J. Sutlieff, Markus J. Bonse, Valentin Christiaens et al.2026 · 3 citationsApJL 1006 L10 (2026)
The VLT/ERIS grating vector Apodizing Phase Plate coronagraph2603.24469v1 · M. A. Kenworthy, F. A. Dannert, J. Hayoz et al.2026 · 1 citationarXiv
The GRAVITY young stellar object survey -- XV. The star-disk interaction region of the T Tauri star DO Tau2603.22444v1 · K. Perraut, J. Bouvier, H. Nowacki et al.2026 · 0 citationsarXiv
Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B2511.20091v1 · Q. Kral, J. Wang, J. Kammerer et al.2025 · 8 citationsarXiv
The gas streamer G1-2-3 in the Galactic Center2510.00897v1 · S. Gillessen, F. Eisenhauer, J. Cuadra et al.2025 · 3 citationsarXiv
First Light for the GRAVITY+ Adaptive Optics: Extreme Adaptive Optics for the Very Large Telescope Interferometer2509.21431v2 · GRAVITY+ Collaboration: F. Allouche, C. Bailet, M. Benisty et al.2025 · 10 citationsarXiv
Spatially resolved broad line region in a quasar at z=4: Dynamical black hole mass and prominent outflow2509.13911v2 · GRAVITY+ Collaboration, K. Abd El Dayem, N. Aimar et al.2025 · 15 citationsarXiv
GRAVITY+ adaptive optics (GPAO) tests in Europe2506.03721v1 · Florentin Millour (LAGRANGE), Guillaume Bourdarot (MPE), Jean-Baptiste Le Bouquin (IPAG) et al.2025 · 1 citationOptical and Infrared Interferometry and Imaging IX, Jun 2024, Yokohama, France. pp.72
Observations of the temporal evolution of Saturn's stratosphere following the Great Storm of 2010-2011 I. Temporal evolution of the water abundance in Saturn's hot vortex of 2011-20132505.02595v1 · Camille Lefour, Thibault Cavali'e, Helmut Feuchtgruber et al.2025 · 0 citationsarXiv
Exploring the presence of a fifth force at the Galactic Center2504.02908v4 · K. Abd El Dayem, R. Abuter, N. Aimar et al.2025 · 9 citationsA&A 698, L15 (2025)
Spectroscopic AGN survey at 2 with NTT/SOFI for GRAVITY+ observations2503.02942v1 · D. J. D. Santos, T. Shimizu, R. Davies et al.2025 · 8 citationsA&A 696, A30 (2025)
High-contrast spectroscopy with the new VLT/ERIS instrument: Molecular maps and radial velocity of the gas giant AF Lep b2502.19961v2 · Jean Hayoz, Markus Johannes Bonse, Felix Dannert et al.2025 · 5 citationsA&A 698, A87 (2025)
Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. II. Measuring Geometric Distances and Black Hole Masses of Four Nearby Quasars2502.18856v2 · Yan-Rong Li, Jinyi Shangguan, Jian-Min Wang et al.2025 · 7 citationsarXiv
The cool brown dwarf Gliese 229 B is a close binary.39415016 · Xuan, Jerry W, Mérand, A, Thompson, W et al.2024 · 30 citationsNature. 2024;634(8036):1070-1074
First Resolution of Microlensed Images of a Binary-Lens Event2409.13015v3 · Zexuan Wu, Subo Dong, A. M'erand et al.2024 · 7 citationsAstrophys. j. 977 (2024) 229
Improving constraints on the extended mass distribution in the Galactic Center with stellar orbits2409.12261v1 · Karim Abd El Dayem, Roberto Abuter, Nicolas Aimar et al.2024 · 49 citationsA&A 692, A242 (2024)on Valency
GRAVITY+ Wavefront Sensors: High-Contrast, Laser Guide Star, Adaptive Optics systems for the VLTI2409.08438v1 · G.Bourdarot, F.Eisenhauer, S.Yaz\icı et al.2024 · 2 citationsSPIE Proceedings, Yokohama 2024
The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N2408.02374v1 · H. Nowacki, K. Perraut, L. Labadie et al.2024 · 4 citationsA&A 690, A123 (2024)
VLTI/GRAVITY Interferometric Measurements of Innermost Dust Structure Sizes around AGNs2407.13458v1 · A. Amorim, G. Bourdarot, W. Brandner et al.2024 · 24 citationsA&A 690, A76 (2024)
GATOS: missing molecular gas in the outflow of NGC5728 revealed by JWST2406.17072v1 · R. Davies, T. Shimizu, M. Pereira-Santaella et al.2024 · 41 citationsA&A 689, A263 (2024)
Abundances of trace constituents in Jupiter's atmosphere inferred from Herschel/PACS observations2406.02179v1 · Cyril Gapp, Miriam Rengel, Paul Hartogh et al.2024 · 6 citationsarXiv
Astrometric detection of a Neptune-mass candidate planet in the nearest M-dwarf binary system GJ65 with VLTI/GRAVITY2404.08746v1 · R.Abuter, A.Amorim, M.Benisty et al.2024 · 6 citationsarXiv
Upgrading the GRAVITY fringe tracker for GRAVITY+: Tracking the white light fringe in the non-observable Optical Path Length state-space2402.03594v1 · M. Nowak, S. Lacour, R. Abuter et al.2024 · 1 citationarXiv
The GRAVITY young stellar object survey XIII. Tracing the time-variable asymmetric disk structure in the inner AU of the Herbig star HD989222401.17764v1 · V. Ganci, L. Labadie, K. Perraut et al.2024 · 0 citationsarXiv
A dynamical measure of the black hole mass in a quasar 11 billion years ago.38286342 · Abuter, R, Allouche, F, Amorim, A et al.2024 · 69 citationsNature. 2024;627(8003):281-285
Broad-line region geometry from multiple emission lines in a single-epoch spectrum2401.12396v1 · L. Kuhn, J. Shangguan, R. Davies et al.2024 · 10 citationsarXiv
The size-luminosity relation of local active galactic nuclei from interferometric observations of the broad-line region2401.07676v1 · A. Amorim, G. Bourdarot, W. Brandner et al.2024 · 62 citationsarXiv
Polarization analysis of the VLTI and GRAVITY2311.03472v1 · F. Widmann, X. Haubois N. Schuhler, O. Pfuhl et al.2023 · 13 citationsarXiv
First VLTI/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity2310.00148v2 · S. Blunt, W. O. Balmer, J. J. Wang et al.2023 · 17 citationsarXiv
Polarimetry and Astrometry of NIR Flares as Event Horizon Scale, Dynamical Probes for the Mass of Sgr A*2307.11821v2 · R. Abuter, N. Aimar, P. Amaro Seoane et al.2023 · 97 citationsA&A 677, L10 (2023)
GMP-selected dual and lensed AGNs: selection function and classification based on near-IR colors and resolved spectra from VLT/ERIS, KECK/OSIRIS, and LBT/LUCI2305.07396v2 · F. Mannucci, M. Scialpi, A. Ciurlo et al.2023 · 22 citationsarXiv
The Enhanced Resolution Imager and Spectrograph for the VLT2304.02343v2 · R. Davies, O. Absil, G. Agapito et al.2023 · 46 citationsarXiv
The GRAVITY+ Project: Towards All-sky, Faint-Science, High-Contrast Near-Infrared Interferometry at the VLTI2301.08071v1 · GRAVITY+ Collaboration: Roberto Abuter, Patricio Alarcon, Fatme Allouche et al.2023 · 26 citationsarXiv
First on-sky results of ERIS at VLT2301.01580v1 · Kateryna Kravchenko, Yigit Dallilar, Olivier Absil et al.2023 · 1 citationarXiv
GRAVITY+ Wide: Towards hundreds of z 2 AGN2209.11602v1 · A. Drescher, M. Fabricius, T. Shimizu et al.2022 · 0 citationsarXiv
GRAVITY faint: reducing noise sources in GRAVITY with a fast metrology attenuation system2209.05593v1 · F. Widmann, S. Gillessen, T. Ott et al.2022 · 2 citationsarXiv
Direct discovery of the inner exoplanet in the HD206893 system. Evidence for deuterium burning in a planetary-mass companion2208.04867v5 · S. Hinkley (Exeter), S. Lacour (LESIA), G.-D. Marleau et al.2022 · 82 citationsarXiv
First Light for GRAVITY Wide: Large Separation Fringe Tracking for the Very Large Telescope Interferometer2206.00684v2 · GRAVITY+ Collaboration: R. Abuter, F. Allouche, A. Amorim et al.2022 · 37 citationsA&A 665, A75 (2022)
ERIS: revitalising an adaptive optics instrument for the VLT1807.05089v1 · Richard Davies, Simone Esposito, Hans Martin Schmid et al.2018 · 28 citationsarXiv
Complex spectral line profiles resulting from cryogenic deformation of the SINFONI/SPIFFI diffraction gratings1707.08923v1 · E. M. George, D. Graff, M. Hartl et al.2017 · 5 citationsJ. Astron. Telesc. Instrum. Syst. 3(3), 035002 (2017)
Making SPIFFI SPIFFIER: Upgrade of the SPIFFI instrument for use in ERIS and performance analysis from re-commissioning1608.02457v2 · E. M. George, D. Graff, H. Feuchtgruber et al.2016 · 24 citationsProc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99080G (August 3, 2016)
Far-infrared photometric observations of the outer planets and satellites with Herschel-PACS1602.05785v1 · T. G. Muller, Z. Balog, M. Nielbock et al.2016 · 16 citationsA&A 588, A109 (2016)
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