2023年3月21日 · Mid-infrared observations are powerful in identifying heavily obscured Active Galactic Nuclei (AGN) which have weak emission in other wavelengths. Data from the Mid-Infrared Instrument (MIRI) onboard JWST provides an …

2024年7月11日 · JWST has discovered a large population of Active Galactic Nuclei (AGN) at high redshift. Many of these newly discovered AGN have broad permitted lines (typically H$\alpha$), but are extremely weak in the X-rays.

2023年10月27日 · Galaxies with strong Na I D absorption are distinguished by enhanced emission line ratios consistent with AGN ionization. We conservatively measure mass outflow rates of 3 - 100 M_\odot yr ^ {-1}; comparable to or exceeding ionized gas outflow rates measured for galaxies at similar stellar mass and redshift.

2024年5月16日 · After one year of operations, one of the most surprising findings in the field of extragalactic astronomy produced by the JWST (Gardner et al. 2023; Rigby et al. 2023) is the unexpectedly high abundance of active galactic nuclei (AGN) during the first billion years of cosmic history (z ≳ 5.5; Greene et al. 2023; Harikane et al. 2023; Kocevski ...

2024年10月16日 · JWST has discovered a large population of active galactic nuclei (AGN) at high redshift, which are weak in the X-rays.

Stellar and AGN Feedback Probed with Outflows in JWST Galaxies at z=3-9: Implications of More Spherical Galactic Fountains, Xu et al., 2023, arXiv, arXiv:2310.06614; A JWST/NIRCam study of key contributors to reionization: the star-forming and ionizing properties of UV-faint z 7-8 galaxies, Endsley et al., 2023, MNRAS, 524, 2312

2025年3月17日 · Specifically, we measured the fluxes in the HST and JWST filters from within 0.3 arcsec of the galaxy centre, where most of the AGN emission was expected according to the PSFs.

2023年6月12日 · Mid-infrared (mid-IR) observations are powerful in identifying heavily obscured active galactic nuclei (AGN) that have weak emission in other wavelengths. Data from the Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope provides an excellent opportunity to perform such studies.

1 天前 · JWST MIRI’s coverage allows us to find obscured and low-luminosity AGN, as the mid-IR is largely insensitive to obscuration. We are selecting AGN in MEGA program by utilizing the existing 3-5 μ 𝜇 \mu italic_μ m coverage from CEERS to observe stellar minimum in addition to the MEGA MIRI coverage to observe dust emission longwards of 6 μ ...

1 天前 · Notably, unlike any other z > 10 galaxies confirmed by the JWST 3,4,5,6,22,23,24, the PRISM spectrum also reveals a bright emission line detected at high signal-to-noise ratio (SNR = 6.4) and ...