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Akademický článek

JWST/NIRSpec Observations of Brown Dwarfs in the Orion Nebula Cluster

Autor: K. L. Luhman, C. Alves de Oliveira, I. Baraffe, G. Chabrier, E. Manjavacas, R. J. Parker, P. Tremblin

Publikováno v: The Astrophysical Journal, Vol 975, Iss 2, p 162 (2024)

We have used the multiobject mode of the Near-Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST) to obtain low-resolution 1–5 μ m spectra of 22 brown dwarf candidates in the Orion Nebula Cluster, which were selected wit

Externí odkaz: https://doaj.org/article/19c7c1e5fffd42d090fa5eedd9bbc94e

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Akademický článek

A JWST Survey for Planetary Mass Brown Dwarfs in IC 348

Autor: K. L. Luhman, C. Alves de Oliveira, I. Baraffe, G. Chabrier, T. R. Geballe, R. J. Parker, Y. J. Pendleton, P. Tremblin

Publikováno v: The Astronomical Journal, Vol 167, Iss 1, p 19 (2023)

We have obtained images of the center of the star-forming cluster IC 348 with the James Webb Space Telescope and have identified brown dwarf candidates based on their photometry and point-like flux profiles. Low-resolution spectroscopy has been perfo

Externí odkaz: https://doaj.org/article/4fd417aaee32400cad49500915545d37

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Akademický článek

JWST/NIRSpec Observations of the Coldest Known Brown Dwarf

Autor: K. L. Luhman, P. Tremblin, C. Alves de Oliveira, S. M. Birkmann, I. Baraffe, G. Chabrier, E. Manjavacas, R. J. Parker, J. Valenti

Publikováno v: The Astronomical Journal, Vol 167, Iss 1, p 5 (2023)

We present 1–5 μ m spectroscopy of the coldest known brown dwarf, WISE J085510.83−071442.5 (WISE 0855), performed with the Near-Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST). NIRSpec has dramatically improved the

Externí odkaz: https://doaj.org/article/41fa8a9f379445f0aa96c3d71df376d9

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Akademický článek

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Akademický článek

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Statistical properties and correlation length in star-forming molecular clouds: I. Formalism and application to observations

Autor: E. Jaupart, G. Chabrier

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 663, ⟨10.1051/0004-6361/202141084⟩

The proper characterization of the general statistical behavior of these fluctuations, from a limited sample of observations or simulations, is of prime importance to understand the process of star formation. In this article, we use the ergodic theor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04d8f8e0b5b437e8b3334a047a33d3f1
http://arxiv.org/abs/2205.12571

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Statistical properties and correlation length in star-forming molecular clouds: II. Gravitational potential and virial parameter

Autor: E. Jaupart, G. Chabrier

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 663, ⟨10.1051/0004-6361/202141087⟩

In the first article of this series, we have used the ergodic theory to assess the validity of a statistical approach to characterize various properties of star-forming molecular clouds (MCs) from a limited number of observations or simulations. This

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c5a1b74e142f81d286561b76796a179

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Non-ideal self-gravity and cosmology: the importance of correlations in the dynamics of the large-scale structures of the Universe

Autor: P. Tremblin, G. Chabrier, T. Padioleau, S. Daley-Yates

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2022, 659, pp.A108. ⟨10.1051/0004-6361/202142103⟩
Astronomy and Astrophysics-A&A, 2022, 659, pp.A108. ⟨10.1051/0004-6361/202142103⟩

Inspired by the statistical mechanics of an ensemble of interacting particles (BBGKY hierarchy), we propose to account for small-scale inhomogeneities in self-gravitating astrophysical fluids by deriving a non-ideal Virial theorem and non-ideal Navie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f3f4e98616bf6088b11f72c725ce8fc
https://hal.science/hal-03364347

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