Description
Recent cosmological simulations predict that the coevolution of SMBHs and galaxies predominantly occurs through secular processes in the epochs between mergers. To test this hypothesis, Simmons, Smethurst & Lintott (2017) isolated galaxy merger-free coevolution by observing a sample of 101 disk-dominated "bulgeless" AGN from SDSS, which are assumed to be merger-free since z~2. They showed that secular processes can grow SMBHs up to 10^9 solar masses and lie on typical scaling relations, despite their limited sample size.
Here we present a first look at disk-dominated "bulgeless" AGN in DESI DR1, which should provide up to an order of magnitude increase in sample size. Preliminary work with the DESI EDR has confirmed the result of Simmons, Smethurst & Lintott (2017), once again providing mounting evidence that galaxy SMBH scaling relations are not reliant on a merger dominated growth history.
