Star formation in CALIFA survey perturbed galaxies - I. Effects of tidal interactions
Por:
Morales-Vargas, A., Torres-Papaqui, J. P., Rosales-Ortega, F. F., Sanchez, S. F., Chow-Martinez, M., Ortega-Minakata, R. A., Trejo-Alonso, J. J., Robleto-Orus, A. C., Romero-Cruz, F. J., Neri-Larios, D. M., CALIFA Survey Collaboration
Publicada:
1 dic 2020
Resumen:
We explore the effects of tidal interactions on star formation (SF) by
analysing a sample of CALIFA survey galaxies. The sample consists of
tidally and non-tidally perturbed galaxies whose star-forming regions
are paired at the closest stellar mass surface densities, even between
the same galaxy types. The regions are then compared, both on the
resolved star-formation main sequence (SFMS) plane and in annular
property profiles. Star-forming regions in tidally perturbed galaxies
exhibit flatter SFMS slopes compared to star-forming regions in
non-tidally perturbed galaxies. Despite the fact that the annular
profiles show star-forming regions in tidally perturbed galaxies as
being mostly older, their SF properties are never reduced against those
of non-tidally perturbed galaxies. Star-forming regions in non-tidally
perturbed galaxies are better candidates for SF suppression (quenching).
The lowered SF with increasing stellar mass density in tidally perturbed
galaxies may suggest a lower dependence of SF on stellar mass. Though
the SFMS slopes, either flatter or steeper, are found independent of
stellar mass density, the effect of global stellar mass cannot be
ignored when distinguishing between galaxy types. Since a phenomenon or
property other than local/global stellar mass may be taking part in the
modulation of SF, the integrated SF properties are related to the tidal
perturbation parameter. We find weak, but detectable, positive
correlations for perturbed galaxies suggesting that tidal perturbations
induced by close companions increase the gas accretion rates of these
objects.
Filiaciones:
Morales-Vargas, A.:
(Corresponding Author), Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico
Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico
Torres-Papaqui, J. P.:
Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico
Rosales-Ortega, F. F.:
Inst Nacl Astrofis Opt & Electr, Luis Enrique Erro 1, Tonantzintla 72840, Mexico
Sanchez, S. F.:
Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, DF, Mexico
Chow-Martinez, M.:
Univ Nacl Autonoma Nicaragua, Rotonda Univ Rigoberto Lopez Perez, Inst Geol & Geofis, 150 Metros Est, Managua 663, Nicaragua
Ortega-Minakata, R. A.:
UNAM, Inst Radioastron & Astrofis IRyA, Apartado Postal 72-3, Morelia 58089, Michoacan, Mexico
Trejo-Alonso, J. J.:
Univ Autonoma Queretaro, Ctr Univ, Fac Ingn, Cerro Campanas S-N, Santiago De Queretaro 76010, Mexico
Robleto-Orus, A. C.:
Univ Guanajuato, Dept Astron, Apartado Postal 144, Guanajuato 36000, Mexico
Romero-Cruz, F. J.:
Inst Tecnol Super Guanajuato, Guanajuato 36262, Mexico
Neri-Larios, D. M.:
Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia
Green Submitted
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