Results 41 to 50 of about 114 (114)

Planets, Planetary Nebulae, and Intermediate Luminosity Optical Transients (ILOTs)

Galaxies, 2018
I review some aspects related to the influence of planets on the evolution of stars before and beyond the main sequence. Some processes include the tidal destruction of a planet on to a very young main sequence star, on to a low-mass main sequence star ...
Noam Soker
doaj   +1 more source

Chemical Links between a Young M-type T Tauri Star and Its Substellar Companion: Spectral Analysis and C/O Measurement of DH Tau A

The Astrophysical Journal
The chemical abundance measurements of host stars and their substellar companions provide a powerful tool to trace the formation mechanism of the planetary systems.
Neda Hejazi, Jerry W. Xuan, David R. Coria, Erica Sawczynec, Ian J. M. Crossfield, Paul I. Cristofari, Zhoujian Zhang, Maleah Rhem   +7 more
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Orbital Inclination of Astrometric Binaries and the Dearth of Face-on Orbits in Gaia DR3 Solutions

The Astrophysical Journal Letters
The orbital solutions for astrometric (unresolved) binary stars provided in the Gaia mission DR3 reveal an obvious deficit of face-on orbits with line-of-sight inclinations close to 0 or π .
Valeri V. Makarov
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JWST-TST High Contrast: Achieving Direct Spectroscopy of Faint Substellar Companions Next to Bright Stars with the NIRSpec Integral Field Unit

The Astronomical Journal
The JWST NIRSpec integral field unit (IFU) presents a unique opportunity to observe directly imaged exoplanets from 3 to 5 μ m at moderate spectral resolution ( R ∼ 2700) and thereby better constrain the composition, disequilibrium chemistry, and cloud ...
Jean-Baptiste Ruffio, Marshall D. Perrin, Kielan K. W. Hoch, Jens Kammerer, Quinn M. Konopacky, Laurent Pueyo, Alex Madurowicz, Emily Rickman, Christopher A. Theissen, Shubh Agrawal, Alexandra Z. Greenbaum, Brittany E. Miles, Travis S. Barman, William O. Balmer, Jorge Llop-Sayson, Julien H. Girard, Isabel Rebollido, Rémi Soummer, Natalie H. Allen, Jay Anderson, Charles A. Beichman, Andrea Bellini, Geoffrey Bryden, Néstor Espinoza, Ana Glidden, Jingcheng Huang, Nikole K. Lewis, Mattia Libralato, Dana R. Louie, Sangmo Tony Sohn, Sara Seager, Roeland P. van der Marel, Hannah R. Wakeford, Laura L. Watkins, Marie Ygouf, C. Matt Mountain   +35 more
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JWST-TST High Contrast: Spectroscopic Characterization of the Benchmark Brown Dwarf HD 19467 B with the NIRSpec Integral Field Spectrograph

The Astronomical Journal
We present the atmospheric characterization of the substellar companion HD 19467 B as part of the pioneering James Webb Space Telescope Guaranteed Time Observer program to obtain moderate resolution spectra ( R ∼ 2700, 3–5 μ m) of a high-contrast ...
Kielan K. W. Hoch, Christopher A. Theissen, Travis S. Barman, Marshall D. Perrin, Jean-Baptiste Ruffio, Emily Rickman, Quinn M. Konopacky, Elena Manjavacas, William O. Balmer, Laurent Pueyo, Jens Kammerer, Roeland P. van der Marel, Nikole K. Lewis, Julien H. Girard, Sara Seager, Mark Clampin, C. Matt Mountain   +16 more
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The First High-contrast Images of Near High-mass X-Ray Binaries with Keck/NIRC2

The Astrophysical Journal
Although the study of X-ray binaries has led to major breakthroughs in high-energy astrophysics, their circumbinary environment at scales of ∼100–10,000 au has not been thoroughly investigated. In this paper, we undertake a novel and exploratory study by
M. Prasow-Émond, J. Hlavacek-Larrondo, K. Fogarty, É. Artigau, D. Mawet, P. Gandhi, J. F. Steiner, J. Rameau, D. Lafrenière, A. Fabian, D. J. Walton, R. Doyon, B. B. Ren   +12 more
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SaNDi-SHoP: Searching for Satellites’N’Disks with a Star-Hopping Program

Astronomy & Astrophysics
Aims. We searched for satellites and circumplanetary or circumsubstellar disks around directly imaged substellar companions, exploring their immediate environment to constrain the conditions for satellites and disk formation. Methods.
Lazzoni C., Zurlo A., Desidera S., Bernardi A., Pérez S., Mesa D., Barbato D., Nogueira P. H., Dasgupta A.   +8 more
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An Oasis in the Brown Dwarf Desert: Confirmation of Two Low-mass Transiting Brown Dwarfs Discovered by TESS

The Astronomical Journal
As the intermediate-mass siblings of stars and planets, brown dwarfs (BDs) are vital to study for a better understanding of how objects change across the planet-to-star mass range.
Elina Yuchen Zhang, Theron W. Carmichael, Daniel Huber, Keivan G. Stassun, Akihiko Fukui, Norio Narita, Felipe Murgas, Enric Palle, David W. Latham, Michael L. Calkins, Sara Seager, Joshua N. Winn, Michael Vezie, Rebekah Hounsell, Hugh P. Osborn, Douglas A. Caldwell, Jon M. Jenkins   +16 more
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Pulsation in TESS Objects of Interest

The Astrophysical Journal
We report the discovery of three Transiting Exoplanet Survey Satellite Objects of Interest (TOI) with signatures of pulsation, observed in more than one sector.
R. L. Gomes, B. L. Canto Martins, D. O. Fontinele, L. A. Almeida, R. Alves Freire, A. C. Brito, R. G. S. B. de Amorim, C. E. Ferreira Lopes, D. Hazarika, E. Janot-Pacheco, I. C. Leão, Y. S. Messias, R. A. A. Souza, J. R. De Medeiros   +13 more
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Jupiter-like planets might be common in a low-density environment. [PDF]

Nat Commun, 2023
Gratton R, Mesa D, Bonavita M, Zurlo A, Marino S, Kervella P, Desidera S, D'Orazi V, Rigliaco E.   +8 more
europepmc   +1 more source