36 citations · 187 across the 21 of their papers we have counts for
21 papers
Medium-resolution spectroscopic study of the intermediate-mass pre-main sequence binary Ori E
Rafael Costero, Juan Echevarría, Yilen Gómez Maqueo Chew +2
Ori E is a very young and relatively massive pre-main sequence (PMS) spectroscopic and eclipsing binary with nearly identical components. We analyze Échelle spectra of the sy…
Virial masses of late type galaxies from the SDSS DR16
A. Nigoche-Netro, E. de la Fuente, R. J. Diaz +6
Motivated by the challenges of calculating the dynamical masses of late-type galaxies (LTGs) and the enormous amount of data from the Sloan Digital Sky Survey (SDSS), we calculate…
Échelle Spectroscopy of the Chemically Peculiar Star Ori F
Rafael Costero, Christine Allen, Alex Ruelas-Mayorga +4
We analyse Échelle spectra of Ori F obtained by us on six nights unevenly distributed along six years; we identify several hundred spectral lines and measure, for the first t…
New radial velocity observations of AH Her: evidence for material outside the tidal radius
J. Echevarría, J. V. Hernández Santisteban, O. Segura Montero +7
Spectroscopic observations of AH Herculis during a deep quiescent state are put forward. We found the object in a rare long minima, allowing us to derive accurately the semi-amplit…
The Importance of Historical Measures for Dynamical Models of the Evolution of Trapezium-type Multiple Systems
Christine Allen, Leonardo J. Sanchez, Alex Ruelas-Mayorga +1
As an illustration of the value of historical measures we present some examples of the dynamical evolution of multiple systems resembling the Orion Trapezium. We constructed models…
The quantity of dark matter in early-type galaxies and its relation to the environment
A. Nigoche-Netro, G. Ramos-Larios, P. Lagos +5
We study the behavior of the dynamical and stellar mass inside the effective radius of early-type galaxies (ETGs) as a function of environment considering Newtonian dynamics, diffe…
Extensive Photometry of V1838 Aql during the 2013 Superoutburst
J. Echevarría, E. de Miguel, J. V. Hernández Santisteban +15
We present an in-depth photometric study of the 2013 superoutburst of the recently discovered cataclysmic variable V1838 Aql and subsequent photometry near its quiescent state. A c…
From outburst to quiescence: spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebula
J. V. Hernández Santisteban, J. Echevarría, S. Zharikov +15
We analyse new optical spectroscopic, direct-image and X-ray observations of the recently discovered a high proper motion cataclysmic variable V1838 Aql. The data were obtained dur…
The Dynamical Evolution of Multiple Systems of Trapezium Type
Christine Allen, Alex Ruelas-Mayorga, Leonardo J. Sánchez +1
We have selected archival observational data for several O and B trapezia in the Milky Way. For each of the main components of the trapezia we obtained transverse velocities from t…
Stellar longitudinal magnetic field determination through multi-Zeeman signatures
J. C. Ramírez Vélez, M. J. Stift, S. G. Navarro +3
Context. A lot of effort has been put into the detection and determination of stellar magnetic fields using the spectral signal obtained from the combination of hundreds or thousan…
Variation Of The Tully-Fisher Relation As A Function Of The Magnitude Interval Of A Sample Of Galaxies
A. Ruelas-Mayorga, L. J. Sánchez, M. Trujillo-Lara +4
In this paper we carry out a preliminary study of the dependence of the Tully-Fisher Relation (TFR) with the width and intensity level of the absolute magnitude interval of a limit…
Dark matter inside early-type galaxies as function of mass and redshift
A. Nigoche-Netro, G. Ramos-Larios, P. Lagos +6
We study the behaviour of the dynamical and stellar mass inside the effective radius (re) of early-type galaxies (ETGs). We use several samples of ETGs -ranging from 19 000 to 98 0…
CCD photometry of the Globular Cluster NGC 6093
A. Ruelas-Mayorga, L. J. Sanchez, C. A. Bernal-Herrera +3
In this paper we present photometric CCD observations of the globular cluster NGC 6093 (M80) in filters B, V , R and I. We produce the colour-magnitude diagrams for this object and…
How much dark matter is there inside early-type galaxies?
A. Nigoche-Netro, A. Ruelas-Mayorga, P. Lagos +5
We study the luminous mass as a function of the dynamical mass inside the effective radius (r_e) of early-type galaxies (ETGs) to search for differences between these masses. We as…
Kinematics of the Orion Trapezium Based on Diffracto-Astrometry and Historical Data
J. Olivares, L. J. Sánchez, A. Ruelas-Mayorga +3
Using the novel Diffracto-Astrometry technique, we analyze 44 Hubble Space Telescope Wide Field Planetary Camera 2 images of the Orion Trapezium (OT) taken over a span of 12 yr (19…
Astroclimate at San Pedro Mártir I: 2004-2008 Seeing Statistics from the TMT Site Testing Data
L. J. Sánchez, I. Cruz-González, J. Echevarría +6
We present comprehensive seeing statistics for the San Pedro Mártir site derived from the Thirty Meter Telescope site selection data. The observations were obtained between 2004 an…
Diffracto-Astrometry measurements: accuracy of the measuring algorithm
A. Ruelas-Mayorga, L. J. Sanchez, J. Olivares +4
We present a theoretical analysis of the measuring algorithm we use when applying the Diffracto-Astrometry technique to Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2)…
The intrinsic dispersion of the Faber-Jackson relation for early-type galaxies as function of the mass and redshift
A. Nigoche-Netro, J. A. L. Aguerri, P. Lagos +4
Aims. Recently it has been reported that the intrinsic dispersion at constant magnitude of the structural relations from early-type galaxies is a useful tool to study the universal…
The Faber-Jackson relation for early-type galaxies: Dependence on the magnitude range
A. Nigoche-Netro, J. A. L. Aguerri, P. Lagos +3
We take a sample of early-type galaxies from the Sloan Digital Sky Survey (SDSS-DR7, 90 000 galaxies) spanning a range of approximately 7 in both and filters a…
The Fundamental Plane for early-type galaxies. Dependence on the magnitude range
A. Nigoche-Netro, A. Ruelas-Mayorga, A. Franco Balderas
Studying 3 samples of early-type galaxies, which include approximately 8800 galaxies and cover a relatively ample magnitude range ( ), we find that the coeffici…
The Kormendy Relation for early-type galaxies. Dependence on the magnitude range
A. Nigoche-Netro, A. Ruelas-Mayorga, A. Franco-Balderas
Previous studies indicate that faint and bright early-type galaxies (ETGs) present different coefficients and dispersion for their Kormendy relation (KR). A recently published pape…