An Hα Impression of Lyα Galaxies at z ≃ 6 with Deep JWST/NIRCam Imaging [PDF]
The Astrophysical Journal Letters, 2023 We present a study of seven spectroscopically confirmed (Ly α -emitting) galaxies at redshift z ≃ 6 using the JWST/NIRCam imaging data. These galaxies, with a wide range of Ly α luminosities, were recently observed in a series of NIRCam broad and medium ...
Yuanhang Ning +5 more
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On the Sizes of Ionized Bubbles Around Galaxies During the Reionization Epoch. The Spectral Shapes of the Lyα Emission from Galaxies [PDF]
The Astrophysical Journal Letters, 2023 We develop a new method to determine the distance between a high-redshift galaxy and a foreground screen of atomic hydrogen. In a partially neutral universe, and assuming spherical symmetry, this equates to the radius of an ionized “bubble” ( R _B ...
Matthew J. Hayes, Claudia Scarlata
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The Astrophysical Journal Supplement SeriesWe present the statistical properties of Ly α emission in 586 galaxies at z = 4.5–14.2, observed by multiple JWST/NIRSpec spectroscopy projects, including the JADES, GLASS, CEERS, and GO/DDT programs.
Yuta Kageura +8 more
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CH+(1-0) in a z~2.8 galaxy group: Probe of multi-phasic turbulent gas reservoirs [PDF]
EPJ Web of Conferences, 2022 Starburst galaxies at redshifts z~2 to 4 are among the most intensely star-forming galaxies in the universe. The way they accrete their gas to form stars at such high rates is still a controversial issue.
Vidal-García Alba +13 more
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The polarization of scattered Lyα radiation around high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 The high-redshift Universe contains luminous Lya emitting sources such as galaxies and quasars. The emitted Lyα radiation is often scattered by surrounding neutral hydrogen atoms. We show that the scattered Lyα radiation obtains a high level of polarization for a wide range of likely environments of high-redshift galaxies.
Mark Dijkstra, Abraham Loeb
openaire +1 more source
Lyα Galaxies in the Epoch of Reionization (LAGER): Spectroscopic Confirmation of Two Redshift ∼7.0 Galaxies [PDF]
Astrophysical Journal, 2019 We spectroscopically confirmed two narrowband-selected redshift 7.0 Lyα galaxies and studied their rest-frame UV spectra. The Lyα and other UV nebular lines are very useful to confirm the galactic redshifts and diagnose the different mechanisms driving ...
Huan Yang +9 more
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A comparison of metal and Ly-α absorption in galactic haloes [PDF]
Serbian Astronomical Journal, 1998 The metallicity structure of galactic haloes is one of the major unknowns in modern galactic astrophysics and observational cosmology. Hereby we outline a very simple method for obtaining at least a crude picture of gas abundances, based on ...
Ćirković M.M.
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On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation [PDF]
Serbian Astronomical Journal, 1998 In this work we expand the previous discussion of the plausibility of hypothesis of origin of the Lyα forest absorption systems in haloes of normal galaxies in connection with the HubbleDeepField (HDF) data.
Ćirković M.M., Samurović S.
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JWST/NIRSpec Spectroscopy of z = 7 − 9 Star Forming Galaxies with CEERS: New Insight into Bright Lyα Emitters in Ionized Bubbles [PDF]
Monthly notices of the Royal Astronomical Society, 2023 We describe new JWST/NIRSpec observations of galaxies at z ≳ 7 taken from the CEERS survey. Previous observations of this area have revealed associations of Lyα emitters at redshifts (z = 7.5, 7.7, 8.7) where the intergalactic medium (IGM) is thought ...
M. Tang +11 more
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Directly imaging damped Lyα galaxies at z > 2 – II. Imaging and spectroscopic observations of 32 quasar fields [PDF]
, 2014 Damped Lyα absorbers (DLAs) are a well-studied class of absorption line systems, and yet the properties of their host galaxies remain largely unknown.
M. Fumagalli +10 more
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