Results 1 to 10 of about 3,423,233 (292)

Dust-obscured Galaxies with Broken Power-law Spectral Energy Distributions Discovered by UNIONS

The Astrophysical Journal
We report on the spectral energy distributions (SEDs) of infrared (IR)-bright dust-obscured galaxies (DOGs) with ( i − [22]) _AB ≥ 7.0. Using photometry from the deep and wide Ultraviolet Near-Infrared Optical Northern Survey, combined with near-IR (NIR)
Taketo Yoshida, Tohru Nagao, Yoshiki Toba, Akatoki Noboriguchi, Kohei Ichikawa, Hendrik Hildebrandt, Naomichi Yutani, Kenneth C. Chambers, Ryo Iwamoto, Seira Kobayashi, Masamune Oguri, Ken Osato, Kohei Shibata, Yuxing Zhong   +13 more
doaj   +1 more source

Stars as triggers of interstellar gas entrainment in relativistic jets

Astronomy & Astrophysics
Context. Low-power extragalactic jets are known to be decelerated and dissipate large amounts of energy within their host galaxies. However, the exact process by which this occurs is still elusive. Aims. The aim of this work is to probe the role of stars
Longo B., Perucho M., Martí J. M., Bosch-Ramon V., Hoche Y.   +4 more
doaj   +1 more source

A Census of Photometrically Selected Little Red Dots at 4 < z < 9 in JWST Blank Fields

The Astrophysical Journal
Observations with the James Webb Space Telescope (JWST) have uncovered numerous faint active galactic nuclei (AGN) at z ∼ 5 and beyond. These objects are key to our understanding of the formation of supermassive black holes (SMBHs), their coevolution ...
Vasily Kokorev, Karina I. Caputi, Jenny E. Greene, Pratika Dayal, Maxime Trebitsch, Sam E. Cutler, Seiji Fujimoto, Ivo Labbé, Tim B. Miller, Edoardo Iani, Rafael Navarro-Carrera, Pierluigi Rinaldi   +11 more
doaj   +1 more source

Discovery of a soft X-ray lag in the tidal disruption event AT2021ehb

Astronomy & Astrophysics
In this Letter, we report the detection of soft X-ray time lags – i.e., variability in the softer photons lagging behind that in the harder photons – in seven XMM–Newton observations of the tidal disruption event (TDE) candidate AT2021ehb.
Zhang Wenjie
doaj   +1 more source

The shortest detected intra-day variability of active galactic nuclei in the TESS survey

Astronomy & Astrophysics
Context. Active galactic nuclei (AGNs) are known to be variable in almost all wavelengths and timescales. The shortest AGN variability timescale can be used to probe the smallest scale structures within AGNs. Aims. We aim to measure the shortest detected
Yuk Heechan, Dai Xinyu, Kovacevic Natalie   +2 more
doaj   +1 more source

Observational Evidence for a Correlation between the Magnetic Field of Jets and Star Formation Rate in Host Galaxies

The Astrophysical Journal
Accretion supermassive black holes in the center of active galaxies usually produce “jet”-collimated bipolar outflows of relativistic particles. Magnetic fields near the black hole event horizon may play a crucial role in the formation of jets/outflows ...
Yongyun Chen, Qiusheng Gu, Junhui Fan, Xiaotong Guo, Xiaoling Yu, Nan Ding, Dingrong Xiong   +6 more
doaj   +1 more source

Towards a consistent framework of determining the active galactic nucleus contribution fraction and host galaxy properties

Astronomy & Astrophysics
Decomposing the contributions of active galactic nuclei (AGNs) from their host galaxies is essential for identifying AGN-dominated galaxies and accurately deriving key physical properties of both supermassive black holes (SMBHs) and their host galaxies ...
Chen Mi, Wang Lingyu, Margalef-Bentabol Berta, Małek Katarzyna, Laloux Brivael, La Marca Antonio   +5 more
doaj   +1 more source

Systematic Research of Low-redshift Optically Selected SDSS Type 2 AGNs but with Apparent Long-term Optical Variabilities from Catalina Sky Survey. I. Data Sample and Basic Results

The Astrophysical Journal Supplement Series, 2023
The main objective of this article, the first in a dedicated series, is to report basic results on systematic research of low-redshift optically selected SDSS Type 2 active galactic nuclei (AGNs) but with apparent optical variabilities.
XueGuang Zhang
doaj   +1 more source

Ultra-thick warm absorbers: Enlarging the parameter space of AGN ionised outflows

Astronomy & Astrophysics
Context. The analysis of X-ray absorption features in active galactic nuclei (AGN) provides a wealth of information about the physical properties of the matter surrounding supermassive black holes (SMBHs).
Middei R., Piconcelli E., Nardini E., Marinucci A., Laurenti M., Luminari A., Trindade Falcão A., Tortosa A., Perri M., Puccetti S., Król D. Ł., Borrelli L.   +11 more
doaj   +1 more source

The MURALES survey

Astronomy & Astrophysics
We present the results of VLT/MUSE integral-field spectroscopy of the radio galaxy 3C 313 at z = 0.459, combined with HST and Chandra images. The high-resolution optical and X-ray images show the presence of two sources separated by 0.​​″63 (3.7 kpc ...
Balmaverde Barbara, Guglielminotti Canun Alessio, Capetti Alessandro, Massaro Francesco   +3 more
doaj   +1 more source