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Thursday, January 30, 2025

Astronomers Discover 19 New Quasars Using DESI Legacy Surveys Data


A major discovery has been made within the area of astronomy, with 19 new quasars, together with strongly-lensed, twin, and projected varieties, recognized by way of evaluation of information from the DESI Legacy Surveys photometry catalog. This breakthrough highlights the potential of quasar observations in furthering our understanding of the universe. These objects, recognized for his or her excessive luminosity and powered by supermassive black holes, have lengthy been pivotal for analysis into astrophysics and cosmology. Observations have been carried out on the Palomar Observatory in California.

Findings of the DESI Legacy Surveys

According to the study led by Zizhao He of the Purple Mountain Observatory, the investigation confirmed two strongly-lensed quasars, six twin quasars, and 11 projected quasars. Observations have been carried out on October 15–16, 2023, utilizing the P200/DBSP instrument. The research famous that the lensed quasars, designated J0746+1344 and J2121-0826, have been noticed at redshifts of three.1 and a pair of.39, respectively. J0746+1344 displayed a novel configuration, with the lensing galaxy positioned beside the brightest picture—an anomaly in comparison with typical observations.

Dual and Projected Quasars

As reported by phys.org, the six twin quasars recognized confirmed redshifts starting from 0.59 to three.28, with separations between their parts various from 50,300 to 73,500 mild years. Among these, J1929+6009 stood out as a result of a remarkably small redshift distinction of lower than 0.0001 and a projected separation of 62,800 mild years.

The 11 projected quasars demonstrated separations spanning 35,700 to 123,400 mild years. One such system, J0422+0047, was beforehand considered a gravitationally-lensed quasar system, although additional evaluation indicated an opportunity alignment of projected quasars with an intervening galaxy, complicating its classification.

Implications of the Discovery

This analysis underscores the significance of superior observational methods in uncovering distinctive cosmic phenomena. By analysing the behaviour, redshifts, and configurations of those quasars, astronomers intention to develop their data of the universe’s construction and the dynamics of supermassive black holes.

 



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