Are active galaxies different at large-scale than their non-active twin galaxies?

del Moral-Castro, I.; Ramos Almeida, C.; García-Lorenzo, B.
Bibliographical reference

Highlights of Spanish Astrophysics XI

Advertised on:
5
2023
Number of authors
3
IAC number of authors
3
Citations
0
Refereed citations
0
Description
In this contribution, we will show our results from a sample of 20 pairs of nearby seemingly isolated twin galaxies differing in nuclear activity. Firstly, we present a comparison of the parameter of the spin ($\lambda_{R}$), measured in a region dominated by the galaxy disc. This parameter allows us to assess the rotational support of a galaxy taking advantage of IFU data. Secondly, we will also present our most recent results on the stellar content of the sample. For this, we used full spectral fitting of the optical spectra recovering the star formation history (SFH) of our galaxies. The idea that every massive galaxy goes through a few short active phases during its life is becoming popular. In this scenario, we should not expect to find large-scale differences between the twins either in dynamics or stellar population properties over longer-timescales than the current AGN episode. However, the results presented here indicate that some galaxies are more likely to go through active phases than others, at least in the redshift (0.005 $<$ z $<$ 0.03) and mass ranges (10$^{10}$ $<$ M$\odot$ $<$ 10$^{11}$ M$\odot$) considered in this work.