24 citations · 73 across the 8 of their papers we have counts for
8 papers
On the ages of the stellar populations of galaxies at -7
Eric E. Martínez-García
Recent studies have reported a non evolution of galaxy ages at redshifts higher than 2.5, as well as galaxies older than the Universe. In this work, a sample of galaxies fr…
Colour jumps across the spiral arms of Hubble Ultra Deep Field galaxies
Eric E. Martínez-García, Rosa A. González-Lópezlira, Ivânio Puerari
We have measured, at various wavelengths, the spiral arm pitch angles of a sample of distant spiral galaxies from the Hubble Space Telescope eXtreme Deep Field (XDF). According to…
Mass content of UGC 6446 and UGC 7524 through HI rotation curves: deriving the stellar discs from stellar population synthesis models
P. Repetto, Eric E. Martinez-Garcia, M. Rosado +1
In this work we study the mass distribution of two irregular galaxies, UGC 6446 and UGC 7524, by means of HI rotation curves derived from high resolution HI velocity fields obtaine…
The inclination of the dwarf irregular galaxy Holmberg II
F. J. Sanchez-Salcedo, A. M. Hidalgo-Gamez, E. E. Martinez-Garcia
We provide constraints on the inclination angle of the H\,{\sc i} disk of the dwarf irregular galaxy Holmberg II (Ho II) from stability analysis of the outer gaseous disk. We point…
Reviewing the observational evidence against long-lived spiral arms in galaxies
Eric E. Martinez-Garcia, Ivanio Puerari
We review Foyle et al. (2011) previous results, by applying a Fourier intensity phases method to a nine object sample of galaxies. It was found that two of the objects (NGC 628 and…
Signatures of long-lived spiral patterns
Eric E. Martinez-Garcia, Rosa A. Gonzalez-lopezlira
Azimuthal age/color gradients across spiral arms are a signature of long-lived spirals. From a sample of 19 normal (or weakly barred) spirals where we have previously found azimuth…
Slowly rotating gas-rich galaxies in modified Newtonian dynamics (MOND)
F. J. Sanchez-Salcedo, A. M. Hidalgo-Gamez, Eric E. Martinez-Garcia
We have carried out a search for gas-rich dwarf galaxies that have lower rotation velocities in their outskirts than MOdified Newtonian Dynamics (MOND) predicts, so that the amplit…
Effects of Non-Circular Motions on Azimuthal Color Gradients
Eric E. Martinez-Garcia, Rosa A. Gonzalez-Lopezlira, Gilberto C. Gomez
Assuming that density waves trigger star formation, and that young stars preserve the velocity components of the molecular gas where they are born, we analyze the effects that non-…