L. J. Sánchez

New Spectroscopy of the Intermediate Polar Dw Cnc

A. Ruelas-Mayorga, J. Echevarría, I. Mora Zamora, M Torres Paniagua et autres

We present new spectroscopy of the intermediate polar DW Cnc. We focus our analysis on several emission lines of H and He I. In particular, we obtain the value of the semi-amplitude K1 from the radial velocities of such lines, which varies …

mx, gb (code pays fourni par la source)

Photometric observations of stars in stellar trapezia

Alex R Ruelas-Mayorga, L. J. Sánchez, Alexis R Páez-Amador, Omar I Segura-Montero et autres

Abstract Photometric CCD observations of the brightest stars in several stellar trapezia (ADS 719, ADS 1869, ADS 13292, and ADS 13374) are presented. In order to measure the U, B, V, R, and I magnitudes of the stars in trapezia we utilise …

mx (code pays fourni par la source)

Medium-resolution spectroscopic study of the intermediate-mass pre-main sequence binary θ1 Ori E

R. Costero, J. Echevarría, A. Ruelas-Mayorga, L. J. Sánchez

ABSTRACT $\theta ^1$ Ori E is a very young and relatively massive pre-main sequence (PMS) spectroscopic and eclipsing binary with nearly identical components. We analyse Échelle spectra of the system obtained over fifteen years and report 91 radial velocities measured from cross-correlating …

mx (code pays fourni par la source)

A new radial velocity study of the well-known dwarf nova SS Cygni: a low-mass binary system

I Mora Zamora, J. Echevarría, L. J. Sánchez, S H Ramírez

ABSTRACT We present new high-dispersion spectroscopic observations of the cataclysmic variable SS Cygni at the end of an outburst (decline) and during the first days at quiescence. We determined the orbital parameters of the white dwarf (WD) and the red dwarf (RD) …

mx, gb (code pays fourni par la source)

Transformations between the Gaia GBP, G, and GRP and the Johnson–Cousins photometric system

A. Ruelas-Mayorga, E. Macías-Estrada, L. J. Sánchez, A. Páez-Amador et autres

ABSTRACT We used the Gaia $G_{\rm BP}$, G, and $G_{\rm RP}$ magnitudes of a set of Landolt standard stars to obtain a set of transformations to the Johnson–Cousins U, B, V, R, and I photometric system. The interval of validity for these …

mx (code pays fourni par la source)

Volume Pile Estimation in Irregular Terrains via Drones: A Case Study in the Metal Industry

L. J. Sánchez, Víctor Chapela, Kristel Murillo, Riccardo Cespi

This project presents a method for estimating the volume of diverse types of scrap in a metal industry terrain with new electromobility technologies and tools. The approach utilizes drones that can be employed in many applications that help develop technologies such as …

mx (code pays fourni par la source)

CCD Photometry of Trapezia Stars I

A. Ruelas-Mayorga, L. J. Sánchez, A. Páez-Amador, O. Segura-Montero et autres

We present photometric CCD observations of stars in four stellar trapezia ADS 15184, ADS 4728, ADS 2843, and ADS 16795. This study is performed on images obtained at the Observatorio Astronómico Nacional at San Pedro Mártir (OAN), Baja California, México. In this …

mx (code pays fourni par la source)

CCD Photometry of the Globular Cluster N GC 58971

A. Ruelas-Mayorga, L. J. Sánchez, E. Macías-Estrada, A. Nigoche-Netro

We report CCD photometric observations of the globular cluster NGC 5897, in the Johnson system filters B, V, R, and I. With the values for these magnitudes we obtain various colour indices and produce several colour-magnitude diagrams. We present eight colour-magnitude diagramas: …

si, mx (code pays fourni par la source)

CCD Photometry of Trapezia Stars I

A. Ruelas-Mayorga, L. J. Sánchez, A. Páez-Amador, O. Segura-Montero et autres

We present photometric CCD observations of stars in four stellar trapezia ADS 15184, ADS 4728, ADS 2843, and ADS 16795. This study is performed on images obtained at the Observatorio Astronómico Nacional at San Pedro Mártir (OAN), Baja California, México. In this …

CCD Photometry of the Globular Cluster NGC 5897

A. Ruelas-Mayorga, L. J. Sánchez, A. Nigoche-Netro

We report CCD photometric observations of the globular cluster NGC 5897, in the Johnson system filters B, V , R, and I. With the values for these magnitudes we obtain various colour indices and produce several colour-magnitude diagrams. We present eight colour-magnitude …

mx (code pays fourni par la source)

Dark Energy Survey Year 3 Results: Mis-centering calibration and X-ray-richness scaling relations in redMaPPer clusters

Paul Kelly, J. Jobel, O. Eiger, Ayman Abd et autres

We use Dark Energy Survey Year 3 (DES Y3) clusters with archival X-ray data from XMM-Newton and Chandra to assess the centering performance of the redMaPPer cluster finder and to measure key richness observable scaling relations. In terms of centering, we find …

us, no, au, gb, fr, de, es, br, it, Afrique du Sud, pt (code pays fourni par la source)

Échelle spectroscopy of the chemically peculiar star θ1 Ori F

R. Costero, Christine Allen, A. Ruelas-Mayorga, L. J. Sánchez et autres

ABSTRACT We analyse Échelle spectra of θ1 Ori F obtained by us on six nights unevenly distributed along 6 yr; we identify several hundred spectral lines and measure, for the first time, the star’s heliocentric radial velocity. We also collect and discuss …

mx (code pays fourni par la source)