Results 1 to 10 of about 297,432 (219)
The Astrophysical Journal, 2023 The thermal history of the intergalactic medium is full of extremely useful data in the field of astrophysics and cosmology. In other words, by examining this environment in different redshifts, the effects of cosmology and astrophysics can be observed ...
S. Mobina Hosseini +3 more
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The Astronomical Journal, 2023 We report VLA B-configuration observations of the H i 21 cm line on the close disk galaxy pair NGC 5595 and NGC 5597. At the angular resolution of the observations, ∼7.″1 × 4.″2, while most of the H i 21 cm in NGC 5595 and NGC 5597 has the same extent as
J. Antonio Garcia-Barreto +1 more
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Estimating the Oblateness of Dark Matter Halos Using Neutral Hydrogen Velocity Dispersion
The Astrophysical Journal Letters, 2023 We derive the oblateness parameter q of the dark matter halo of a sample of gas-rich, face-on disk galaxies. We have assumed that the halos are triaxial in shape but their axes in the disk plane ( a and b ) are equal, so that q = c / a measures the halo ...
Mousumi Das +4 more
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Probing the Cold Neutral Medium through H I Emission Morphology with the Scattering Transform
The Astrophysical Journal, 2023 Neutral hydrogen (H I ) emission exhibits complex morphology that encodes rich information about the physics of the interstellar medium. We apply the scattering transform (ST) to characterize the H I emission structure via a set of compact and ...
Minjie Lei, S. E. Clark
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Deep H i Mapping of Stephan’s Quintet and Its Neighborhood
The Astrophysical Journal, 2023 We carried out deep mapping observations of the atomic hydrogen (H i ) 21 cm line emission in a field centered on the famous galaxy group Stephan's Quintet (SQ), using the Five-hundred-meter Aperture Spherical Telescope (FAST) equipped with a 19-beam ...
Cheng Cheng +10 more
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WALLABY Pilot Survey: H i in the Host Galaxy of a Fast Radio Burst
The Astrophysical Journal, 2023 We report on the commensal ASKAP detection of a fast radio burst (FRB), FRB 20211127I, and the detection of neutral hydrogen (H i ) emission in the FRB host galaxy, WALLABY J131913–185018 (hereafter W13–18).
M. Glowacki +19 more
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The Astrophysical Journal Letters, 2023 Outflows and winds launched from young stars play a crucial role in the evolution of protostars and the early stages of planet formation. However, the specific details of the mechanism behind these phenomena, including how they affect the protoplanetary ...
D. Harsono +8 more
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Analyses of Multiple Balmer Emission Lines from Accreting Brown Dwarfs and Very Low Mass Stars
The Astronomical JournalA planetary growth rate, i.e., the mass accretion rate, is a fundamental parameter in planet formation, as it determines a planet's final mass. Planetary mass accretion rates have been estimated using hydrogen lines, based on the models originally ...
Jun Hashimoto, Yuhiko Aoyama
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Limits on the 21 cm Power Spectrum at z = 6.5–7.0 from Murchison Widefield Array Observations
The Astrophysical JournalThis paper presents the spherically averaged 21 cm power spectrum derived from Epoch of Reionization (EoR) observations conducted with the Murchison Widefield Array (MWA). The analysis uses EoR0-field data, centered at (R.A. = 0 h , decl.
C. D. Nunhokee +31 more
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Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment
The Astrophysical Journal, 2023 We present a detection of 21 cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment.
The CHIME Collaboration +32 more
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