Search Publications
New Catalog of Distances to Planetary Nebulae Based on Gaia Parallaxes and Statistical Distances
Peña, M.; Rodríguez, M.; Hernández-Juárez, D.
We have developed a method to determine the most reliable distances for a large group of planetary nebulae. For this purpose, we analyze the distances obtained from Gaia parallaxes and three determinations of statistical distances. The most reliable distance is derived for 2211 objects, and uncertainties for these distances are calculated in a hom…
The Calar Alto Legacy Integral Field Area Survey: Spatial Resolved Properties
Galbany, L.; Sánchez, S. F.; García-Benito, R. +3 more
We present the analysis using the pyPipe3D pipeline for the 895 galaxies that comprises the eCALIFA data release (Sanchez et al. 2023), data with a significantly improved spatial resolution (1.0-1.5"/FWHM). We include a description of (i) the analysis performed by the pipeline, (ii) the adopted datamodel for the derived spatially resolved properti…
Compact Radio Sources in the Field of Tycho's Supernova Remnant
Rodríguez, L. F.; Dzib, S. A.; Yanza, V.
We present sensitive, high angular resolution Jansky Very Large Array observations made in 2014 at 1.50 GHz toward the field of Tycho's supernova remnant. We detect a total of 36 compact sources in a field with radius of 13 arcmin. This number is consistent with the expected number of background sources. We use older observations made with the cla…
Radio Proper Motions of the Nearby Ultra-Cool Dwarf Binary VHS 1256−1257AB
Loinard, L.; Zapata, L. A.; Rodríguez, L. F. +1 more
The proper motions of a source obtained at different epochs or in different spectral regions should in principle be consistent. However, in the case of a binary source or a source with associated ejecta, they could be different depending on the epochs when the observations were made and on what emission is traced in each spectral region. In this p…
Identification of Planetary and Proto-Planetary Nebulae Candidates Through AKARI Infrared Photometry
Corral, L. J.; Ramos-Larios, G.; Kemp, S. N. +3 more
We utilized photometric data from the space telescope AKARI to identify potential planetary nebulae (PNe) and proto-planetary nebulae (PPNe) candidates. Using the color-color diagram, we found a region with a high concentration of established PNe and PPNe, comprising about 95% of the objects. Based on this, we identified 67 objects within this reg…
X-ray Observations of the Very-Faint X-ray Transient XMMSL1 J171900.4-353217: A New Candidate Neutron Star Low-Mass X-ray Binary
Degenaar, N.; Wijnands, R.; Armas Padilla, M. +1 more
XMMSL1 J171900.4–353217 is a very-faint X-ray transient that was discovered in 2010 March when it exhibited an outburst. We report on 7 observations, obtained with the X-Ray Telescope (XRT) aboard the Neil Gehrels Swift Observatory between 2010 May and October. By fitting a single absorbed power-law model to the XRT spectra, we infer power-law ind…
The Variable Stars Population of the Extended Young Globular Cluster NGC 1851
Arellano Ferro, A.; Prudil, Z.; Yepez, M. A. +3 more
We report <i<>VI CCD photometry of the globular cluster NGC 1851. We aim to study the membership of the variable stars detected in the field of the cluster as listed in the Catalogue of Variable stars in Globular Clusters (CVSGC; Clement et al. 2001) and reported by the Gaia mission. We cross match the two sets of variables to produce lig…
The Radio Continuum Source Projected Near HR 8799
Zapata, L. A.; Rodríguez, L. F.
HR 8799 is an A5/F0 V star where exoplanets were first directly imaged. Four exoplanets were found within ≃ 2." 0 from the star. Here we report the VLA detection of a faint (19.1±2.7 µJy) radio continuum (3.0 GHz) source projected at ≃ 2." 2 from the star. The a priori probability of finding a background source with this flux densi…
Long Term CCD Photometry of the Distant Cluster NGC2419: The CMD Revisited
Arellano Ferro, A.; Muneer, S.; Yepez, M. A. +4 more
Employing VI images of NGC 2419 acquired over 17 years, light curves for most of the known variables in the field of the cluster are produced. A cluster membership analysis for about 3100 stars in the cluster field with proper motions from Gaia-DR3 revealed the presence of member stars as far as 140 pc from the cluster center and enabled the const…
X-ray Analysis of Seyfert 1 Galaxies with Optical Polarization: A Test for Unification Models
Guainazzi, M.; Jiménez-Bailón, E.; Longinotti, A. L. +3 more
In accordance with the AGN Unified Model, observed polarization can be related to the orientation of the line of sight with respect to the torus. AGN X-ray emission arises from the central region and carries the imprints of the obscuring material. We aim to test a unified scheme based on optical polarization using X-ray absorption. Using the XMM-N…