2018/10/19 by Patricia Martins de Novais, de Novais, Patricia Martins, L. Sodré +1
Engineering · #CCD and CMOS Imaging Sensors #Space Technology and Applications #Thin-Film Transistor Technologies
paper · pdf · doi:10.48550/arxiv.1810.08340
We have determined the H\α emission line radial profiles for a sample\nof 86 face-on galaxies observed in the CALIFA survey and analyzed with the\nPipe3D pipeline. From a visual analysis we propose a two step classification of\nthese profiles. Initially, they were divided in two classes with respect to the\nmaximum of the H\α emission: C (for central) profiles have the maximum\nline emission at the galaxy center, whereas EX (for extended) profiles have the\nmaximum H\α emission outside the galaxy center. After, we divided the C\ngalaxies in two classes, CE and CL (where E and L stands here for 'early' and\n'late'), through the value of cr, the concentration index in the r-band. We\nanalyzed the profile class dependence of several galaxy parameters, as well as\nexamined the nature of line emission through the BPT diagram. We notice that\nalmost 75% of the sample is in the C class. Elliptical and S0 galaxies dominate\nthe CE class, with spiral galaxies being found mostly in the CL and EX classes.\nWe also notice that spirals in each of these classes have different properties,\nwith CL objects seeming less evolved than those in the EX class.\n