The images cut out of 18 newly discovered quasars are in the SDSS footprint but are not included in the SDSS DR16Q catalog. Credit: arxiv (2025). DOI: 10.48550 / Arxiv.2508.06028
Astronomers from the National University of Seoul, South Korea and elsewhere report the detection of 62 new luminous quasars as part of the complete and brilliant quasar survey (Allbricqs). The discovery was detailed in a research document published on August 8 arxiv pre -printed server.
The quasars, or quasi-studs (QSO) objects, are active galactic nuclei (AGN) in active galaxies centers, supplied by supermassive black holes (SMBHS). They have very high bolometric luminosities (on a quattuordecillion erg / s), emitting an electromagnetic radiation observable on radio, infrared, visible, ultraviolet and wave rays.
The Allbricqs survey aims to identify optically brilliant quasars previously not detected. He finds quasar candidates more efficiently than previous methods using data from the catalog of the large -field infrared survey (WISE) and precise parallaxes and appropriate movement measures of Gaia Data Liver 3 (DR3).
To date, 156 quasars confirmed by spectroscopy have been identified as part of the Allbricqs project, and now a team of astronomers, led by Yunyi Choi of the National University of Seoul, announced new discoveries of Quasar.
“Here, we report 62 new quasars Allbricqs covering various types, which include typical emission line quasars and quasars of the brightest wide iron absorption line discovered to date,” wrote researchers in the article.
First, the Choi team identified 75 quasar candidates in the northern hemisphere. Subsequently, they confirmed the quasar status of 62 sources through spectroscopic observations using three ground telescopes in South Korea and China.
The new Quasars have red offsets between 0.09 and 2.48, while their bolometric luminosities are in the range of 1 to 1,000 erg / s of Quattuordecillion. Consequently, the quasars reported in the document are mainly brilliant with regard to the general QSO population.
One of the quasars detected by the new study, namely J0919 + 3557, was classified by recent observations such as a galaxy with a gap around 0.18. However, the Choi team refined its lag around 2.36 and reclassified it as a low online quasar – a subclass of quasars characterized by unusually low high ionization lines.
Astronomers have pointed out that among their discoveries are rare and notable objects, including a large -ironing absorption line in low ionization (Felobal). The new Felobal, who received the designation J1356 + 3840, turns out to be the brightest quasar of this type to date.
Summing the results, the authors of the article noted that their sample of new quasars will serve as a precious resource for quasar physics, black holes growth, feedback process and property galaxy properties.
“These confirmed quasars allbricqs provide a precious resource for future research on the evolution of Quasar, black holes, their environments and their host galaxies through multiple wavelengths,” concluded scientists.
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More information:
Yunyi Choi et al, allbricqs: the discovery of luminous quasars in the northern hemisphere, arxiv (2025). DOI: 10.48550 / Arxiv.2508.06028
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