Polarization in the GG Tau Ring—Confronting Dust Self-scattering, Dust Mechanical and Magnetic Alignment, Spirals, and Dust Grain Drift

Autor: Ya-Wen Tang, Anne Dutrey, Patrick M. Koch, Stephane Guilloteau, Hsi-Wei Yen, Emmanuel di Folco, Eric Pantin, Takayuki Muto, Akimasa Kataoka, Robert Brauer

Publikováno v: The Astrophysical Journal Letters, Vol 947, Iss 1, p L5 (2023)

We report Atacama Large Millimeter/submillimeter Array (ALMA) polarization observations at 3 and 0.9 mm toward the GG Tau A system. In the ring, the percentage is relatively homogeneous at 3 mm, being 1.2%, while it exhibits a clear radial variation

Externí odkaz: https://doaj.org/article/208bd350511346fdbb8d242f292ee0b4

Discovery of Molecular Line Polarization in the Disk of TW Hya

Autor: Edwin A. Bergin, Anne Dutrey, Richard Teague, Thomas Henning, Wouter Vlemmings, Stephane Guilloteau, Dmitry Semenov, Rolf Kuiper, Charles L. H. Hull, Ian W. Stephens

We report observations of polarized line and continuum emission from the disk of TW~Hya using the Atacama Large Millimeter/submillimeter Array. We target three emission lines, $^{12}$CO (3-2), $^{13}$CO (3-2) and CS (7-6), to search for linear polari

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9e9fa3d0d7b606ed5efa686d642d7b8
http://arxiv.org/abs/2109.09247

Astronomy An ALMA/NOEMA study of gas dissipation and dust evolution in the 5 Myr-old HD 141569A hybrid disc

Autor: E. Chapillon, J. C. Augereau, Anthony Boccaletti, Stephane Guilloteau, Anne Dutrey, Vincent Piétu, J. Péricaud, E. Di Folco

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, pp.A94. ⟨10.1051/0004-6361/201732243⟩

Context.The study of gas-rich debris discs is fundamental to characterising the transition between protoplanetary discs and debris discs.Aims.We determine the physical parameters of the brightest gas-rich debris disc orbiting HD 141569A.Methods.We an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5031f1861abd29619dfc1a815de8e148
https://hal.sorbonne-universite.fr/hal-02553367/document

Rotational relaxation of HCO+ and DCO+ by collision with H2

Autor: Stephane Guilloteau, Otoniel Denis-Alpizar, Anne Dutrey, Thierry Stoecklin

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 497 (4), pp.4276-4281. ⟨10.1093/mnras/staa2308⟩

International audience; The HCO+ and DCO+ molecules are commonly used as tracers in the interstellar medium. Therefore, accurate rotational rate coefficients of these systems with He and H2 are crucial in non-local thermal equilibrium models. We dete

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3696a7f5d965af1dc6ef0b2047203a97
https://hal-cnrs.archives-ouvertes.fr/hal-03044185

Masses and Implications for Ages of Low-Mass Pre-Main Sequence Stars in Taurus and Ophiuchus

Autor: Gail Schaefer, Vincent Piétu, E. Chapillon, Nicolas Grosso, Stephane Guilloteau, E. Di Folco, Anne Dutrey, Tracy L. Beck, Lisa Prato, Gregory A. Feiden, Michal Simon

Publikováno v: The Astrophysical Journal
The Astrophysical Journal, 2019, 884 (1), pp.id. 42. ⟨10.3847/1538-4357/ab3e3b⟩
The Astrophysical Journal, American Astronomical Society, 2019, 884 (1), pp.id. 42. ⟨10.3847/1538-4357/ab3e3b⟩

The accuracy of masses of pre-main sequence (PMS) stars derived from their locations on the Hertzsprung-Russell Diagram (HRD) can be tested by comparison with accurate and precise masses determined independently. We present 29 single stars in the Tau

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7783a5e1f4cf1ac24e2117a211ef12e8
http://hdl.handle.net/20.500.12278/95338