AK
Andreas Kaufer
astro-ph.GAastro-phastro-ph.IMastro-ph.SRgr-qcastro-ph.HEastro-ph.EPastro-ph.COphysics.class-ph
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
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Preprints & journals
64 papers in the corpus · 1999–2026Improving 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
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
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
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)
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
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
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
Using the motion of S2 to constrain vector clouds around SgrA*2312.02653v2 · A. Foschi, R. Abuter, K. Abd El Dayem et al.2023 · 13 citationsarXiv
Polarization analysis of the VLTI and GRAVITY2311.03472v1 · F. Widmann, X. Haubois N. Schuhler, O. Pfuhl et al.2023 · 13 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)
Using the motion of S2 to constrain scalar clouds around SgrA*2306.17215v4 · A. Foschi, R. Abuter, N. Aimar et al.2023 · 37 citationsarXiv
Where intermediate-mass black holes could hide in the Galactic Centre: A full parameter study with the S2 orbit2303.04067v2 · O. Straub, M. Baubock, R. Abuter et al.2023 · 31 citationsA&A 672, A63 (2023)
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 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)
CRIRES high-resolution near-infrared spectroscopy of diffuse interstellar band profiles. Detection of 12 new DIBs in the YJ band and the introduction of a combined ISM sight line and stellar analysis approach2203.12562v3 · A. Ebenbichler, A. Postel, N. Przybilla et al.2022 · 24 citationsA&A 662, A81 (2022)
Deep Images of the Galactic Center with GRAVITY2112.07477v1 · R. Abuter, N. Aimar, A. Amorim et al.2021 · 37 citationsA&A 657, A82 (2022)on Valency
The mass distribution in the Galactic Centre from interferometric astrometry of multiple stellar orbits2112.07478v1 · R. Abuter, N. Aimar, A. Amorim et al.2021 · 287 citationsA&A, 2021,on Valency
Constraining particle acceleration in Sgr A* with simultaneous GRAVITY, Spitzer, NuSTAR and Chandra observations2107.01096v1 · R. Abuter, A. Amorim, M. Baubock et al.2021 · 67 citationsA&A 654, A22 (2021)
MOLsphere and pulsations of the Galactic Center's red supergiant GCIRS 7 from VLTI/GRAVITY2105.09832v1 · G. Rodr'iguez-Coira, T. Paumard, G. Perrin et al.2021 · 4 citationsA&A 651, A37 (2021)
High contrast imaging at 10 microns, a search for exoplanets around: Eps Indi A, Eps Eri, Tau Ceti, Sirius A and Sirius B2104.13032v1 · P. Pathak, D. J. M. Petit dit de la Roche, M. Kasper et al.2021 · 30 citationsA&A 652, A121 (2021)
Improved GRAVITY astrometric accuracy from modeling of optical aberrations2101.12098v1 · R. Abuter, A. Amorim, M. Baubock et al.2021 · 195 citationsA&A 647, A59 (2021)
Detection of faint stars near SgrA* with GRAVITY2011.03058v2 · R. Abuter, A. Amorim, M. Baubock et al.2020 · 35 citationsA&A 645, A127 (2021)on Valency
Dynamically important magnetic fields near the event horizon of Sgr A*2009.01859v2 · A. Jim'enez-Rosales, J. Dexter, F. Widmann et al.2020 · 73 citationsarXiv
The Flux Distribution of Sgr A*2004.07185v2 · R. Abuter, A. Amorim, M Bauboeck et al.2020 · 64 citationsA&A 638, A2 (2020)
Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole2004.07187v1 · R. Abuter, A. Amorim, M. Bauboeck et al.2020 · 567 citationsarXivon Valency
The chemical evolution of the dwarf Spheroidal galaxy Sextans1911.08627v2 · R. Theler, P. Jablonka, R. Lucchesi et al.2019 · 32 citationsarXiv
VLT/FLAMES high-resolution chemical abundances in Sculptor: a textbook dwarf spheroidal galaxy1812.01486v2 · Vanessa Hill, 'Asa Sk'ulad'ottir, Eline Tolstoy et al.2018 · 127 citationsA&A 626, A15 (2019)
Multiple Star Systems in the Orion Nebula1809.10376v1 · Martina Karl, Oliver Pfuhl, Frank Eisenhauer et al.2018 · 41 citationsA&A 620, A116 (2018)
GRAVITY chromatic imaging of Eta Car's core1808.02141v1 · J. Sanchez-Bermudez, G. Weigelt, J. M. Bestenlehner et al.2018 · 8 citationsarXiv
Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole1807.09409v1 · R. Abuter, A. Amorim, N. Anugu et al.2018 · 943 citationsA&A 615, L15 (2018)on Valency
First Light for GRAVITY: Phase Referencing Optical Interferometry for the Very Large Telescope Interferometer1705.02345v1 · R. Abuter, M. Accardo, A. Amorim et al.2017 · 586 citationsA&A 602, A94 (2017)
VLT/FLAMES spectroscopy of red giant branch stars in the Fornax dwarf spheroidal galaxy1409.7703v1 · B. Lemasle, T. de Boer, V. Hill et al.2014 · 98 citationsA&A 572, A88 (2014)
The variable stellar wind of Rigel probed at high spatial and spectral resolution1405.0907v1 · O. Chesneau, A. Kaufer, O. Stahl et al.2014 · 10 citationsarXiv
Nucleosynthesis and the Inhomogeneous Chemical Evolution of the Carina Dwarf Galaxy1204.0787v2 · Kim Venn, Matthew Shetrone, Mike Irwin et al.2012 · 167 citationsarXiv
NGC 1866: a milestone for understanding the chemical evolution of stellar populations in the LMC1012.1476v1 · A. Mucciarelli, S. Cristallo, E. Brocato et al.2010 · 59 citationsarXiv
High spatial resolution monitoring of the activity of BA supergiant winds1010.6228v1 · Olivier Chesneau (FIZEAU), Luc Dessart (OAMP), A. Kaufer (ESO) et al.2010 · 0 citationsarXiv
Extremely metal-poor stars in classical dwarf spheroidal galaxies: Fornax, Sculptor and Sextans1008.3721v2 · M. Tafelmeyer, P. Jablonka, V. Hill et al.2010 · 162 citationsarXiv
A high resolution VLT/FLAMES study of individual stars in the centre of the Fornax dwarf spheroidal galaxy1007.1007v1 · B. Letarte, V. Hill, E. Tolstoy et al.2010 · 228 citationsLetarte et al. (2010) A&A 523, 17
Chemical Composition of Extremely Metal-Poor Stars in the Sextans Dwarf Spheroidal Galaxy0904.4307v1 · W. Aoki, N. Arimoto, K. Sadakane et al.2009 · 122 citationsarXiv
New insights into the nature of the SMC WR/LBV binary HD 59800711.4858v1 · C. Foellmi, G. Koenigsberger, L. Georgiev et al.2007 · 12 citationsRev.Mex.Astron.Astrofis.44:3-27,2008
A Spectroscopic Study of Mass Outflows in the Interacting Binary RY Scuti0706.3206v1 · E. D. Grundstrom, D. R. Gies, T. C. Hillwig et al.2007 · 53 citationsAstrophys.J.667:505-519,2007
Rapid-Response Mode VLT/UVES spectroscopy of GRB060418: Conclusive evidence for UV pumping from the time evolution of FeII and NiII excited- and metastable-level populationsastro-ph/0611690v3 · P.M. Vreeswijk, C. Ledoux, A. Smette et al.2006 · 109 citationsAstron.Astrophys.468:83-96,2007
A new view of the dwarf spheroidal satellites of the Milky Way from VLT/FLAMES: Where are the very metal poor stars?astro-ph/0611420v1 · Amina Helmi, M.J. Irwin, E. Tolstoy et al.2006 · 214 citationsAstrophys.J.651:L121-L124,2006
The DART imaging and CaT survey of the Fornax Dwarf Spheroidal Galaxyastro-ph/0608370v1 · G. Battaglia, E. Tolstoy, A. Helmi et al.2006 · 313 citationsAstron.Astrophys. 459 (2006) 423
Three intervening galaxy absorbers towards GRB060418: faint and dusty?astro-ph/0607483v2 · Sara L. Ellison, Paul Vreeswijk, Cedric Ledoux et al.2006 · 47 citationsMon.Not.Roy.Astron.Soc.Lett. 372 (2006) L38-L42
The VLT-FLAMES Survey of Massive Stars: Stellar parameters and rotational velocities in NGC3293, NGC4755 and NGC6611astro-ph/0606409v1 · P.L. Dufton, S.J. Smartt (QUB), J.K. Lee (QUB) et al.2006 · 127 citationsarXiv
Multi-periodic photospheric pulsations and connected wind structures in HD64760astro-ph/0510511v1 · A. Kaufer, O. Stahl, R.K. Prinja et al.2005 · 43 citationsarXiv
The VLT-FLAMES Survey of Massive Stars: Observations in the Galactic Clusters NGC 3293, NGC 4755 and NGC 6611astro-ph/0503655v2 · C. J. Evans, S. J. Smartt, J.-K. Lee et al.2005 · 196 citationsarXiv
The cool atmospheres of the binary brown dwarf eps Indi Bastro-ph/0503297v2 · M.F. Sterzik, E. Pantin, M. Hartung et al.2005 · 9 citationsarXiv
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