A5054372324- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Gamma-ray bursts and supernovae
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Molecular Spectroscopy and Structure
- Astrophysical Phenomena and Observations
- Astronomical and nuclear sciences
- Adaptive optics and wavefront sensing
- Solar and Space Plasma Dynamics
- History and Developments in Astronomy
- Scientific Research and Discoveries
- Space Exploration and Technology
- SAS software applications and methods
- Geophysics and Gravity Measurements
- Inorganic Fluorides and Related Compounds
- Image Processing and 3D Reconstruction
- Protein Structure and Dynamics
- Laser-Plasma Interactions and Diagnostics
- Ancient Egypt and Archaeology
Universidad de Sonora
2012-2023
Universidad Nacional Autónoma de México
2002-2008
Universidad Autónoma de Baja California
2006-2008
American Museum of Natural History
2005
United States Postal Service
2003
As part of a systematic search programme 10-degree wide strip the Northern Galactic plane we present preliminary evidence for discovery four (and possibly five) new supernova remnants (SNRs). The pilot area covered 19-20 hour right ascension zone sampling from +20 to +55 degrees in declination using binned mosaic images INT Photometric H-alpha Survey (IPHAS). optical identification candidate SNRs was based mainly on their filamentary and arc-like emission morphologies, apparently coherent,...
We present the first results of our search for new, extended planetary nebulae (PNe) based on careful, systematic, visual scrutiny imaging data from Isaac Newton Telescope Photometric Hα Survey Northern Galactic plane (IPHAS). The newly uncovered PNe will help to improve census this important population objects that serve as key windows into late-stage evolution low- intermediate-mass stars. They also facilitate study faint end ensemble PN luminosity function. sensitivity and coverage IPHAS...
We present a spectroscopic survey of the stellar population Sigma Orionis cluster. have obtained spectral types for 340 stars. Spectroscopic data typing come from several spectrographs with similar coverage and resolution. More than half stars our sample are members confirmed by presence lithium in absorption, strong H$\alpha$ emission or weak gravity-sensitive features. In addition, we high resolution (R~34000) spectra region 169 region. Radial velocities were calculated this set. The...
With its remarkable double-S shape, IC 4634 is an archetype of point-symmetric planetary nebulae (PN). In this paper, we present a detailed study PN using archival HST WFPC2 and ground-based narrow-band images to investigate morphology, long-slit spectroscopic observations determine kinematics derive physical conditions excitation. The data reveal new structural components, including distant string knots distributed along arc-like feature 40"-60" from the center nebula, skin enhanced [O...
Me 2-1 is a high-excitation planetary nebula whose morphology and physical structure have not yet been investigated. We present narrow-band images in several emission lines, high- intermediate-resolution long-slit spectra aimed at investigating its 3D structure, parameters chemical abundances. By applying deconvolution techniques to the images, we identified 2-1: an elliptical ring; two elongated, curved structures (caps) that contain three pairs of bright point-symmetric (PS) knots; shell...
We present narrow-band Halpha and [OIII] images, high-resolution, long-slit spectra of the planetary nebulae (PNe) Abell36, DeHt2, RWT152 aimed at studying their morphology internal kinematics. These data are complemented with intermediate-resolution, to describe spectral properties central stars nebulae. The morphokinematical analysis shows that Abell36 consists an inner spheroid two bright point-symmetric arcs; DeHt2 is elliptical protruding polar regions a non-equatorial ring; bipolar....
Aims.We analyse the point-symmetric planetary nebula NGC 6309 in terms of its three-dimensional structure and internal variations physical conditions to deduce processes involved formation.
We have analysed optical, near-, and mid-IR images of the bright planetary nebula (PN) IC 418. These probe unambiguously for first time a number low surface brightness structures shells around main nebula, including radial filaments or rays, system three concentric rings, two detached haloes with sizes ~ 150" 220"\times250", respectively. The is slightly off-centered respect to elliptical outer halo. time-lapse between 10,000-50,000 yr, whereas rings 630 yr. emphasize advantages near-...
We present new narrow-band Hα, [N ii], and [O iii] high-resolution images of the quadrupolar planetary nebula NGC 6309 that show in great detail its bipolar lobes reveal morphological features. New high- low-dispersion long-slit spectra have been obtained to help investigation nebular components. The unveil two diffuse blobs, one them located ≃55 arcsec from central star along NE direction (PA = +71°) other at ≃ 78 SW –151°). Therefore, these structures do not share symmetry axes inner...
(Abridged) The origin of hot subdwarf O-type stars (sdOs) remains unclear since their discovery in 1947. Among others, a post-Asymptotic Giant Branch (post-AGB) is possible for fraction sdOs. We are involved comprehensive ongoing study to search and analyze planetary nebulae (PNe) around sdOs with the aim establishing properties post-AGB origin. use deep Halpha [OIII] images detect nebular emission intermediate resolution, long-slit optical spectroscopy detected sdO central stars. These data...
We investigated the origin of Planetary Nebula (PN) M 1–16 using narrow-band optical imaging, and high- low-resolution spectra to perform a detailed morpho-kinematic chemical studies. is revealed be multipolar PN that predominantly emits in [O III ] inner part nebula [N II lobes. A novel spectral unsharp masking technique was applied position-velocity (PV) maps reveal set multiple structures at centre spanning radial velocities from −40 km s −1 20 , with respect systemic velocity. The model...
With its bright and wide equatorial waist seen almost edge-on ('the butterfly body') the faint broad bipolar extensions wings'), NGC 650-1 is archetypical example of planetary nebula (PN) with morphology. We present here deep high-resolution broad- narrow-band optical images that expose rich intricate fine structure this PN, small-scale bubble-like features collimated outflows. A shape spatio-kinematic model indicates has a central torus an inclination angle 75° respect to line sight,...
We report high- and low-dispersion spectroscopy, optical imaging, high-resolution Very Large Array-A λ3.6 cm continuum observations of the peculiar planetary nebula IC 2149. These show that "bipolar" is a suitable morphological classification for Most nebular material concentrated in knotty, bright ring seen edge-on, embedded an apparently oblate ellipsoidal shell from which remnant or incipient bipolar lobes emerge. confirm previously reported depletion heavy elements deduce very low...
The kinematics and physical conditions of the bipolar planetary nebula M 2-48 are analysed from high low dispersion long-slit spectra. Previous CCD narrow-band optical observations have suggested that this is mainly formed by a pair symmetric bow-shocks, an off-center semi-circular shell, internal structure. outflow has complex structure, characterised series shocked regions located between bright core polar tips. There apparent kinematic discontinuity outer regions. fragmented ring around...
Optical broadband BVRI observations of 54 galaxies selected from the Catalog Isolated Triplets Galaxies in Northern Hemisphere have been carried out at San Pedro Mártir National Observatory to evaluate their photometric and morphological properties. We complement our analysis with Two-Micron All Sky Survey (2MASS) Sloan Digital (SDSS) images look for signatures likely related interactions/mergers. report apparent/absolute magnitudes colors galaxies. The membership these is re-evaluated by...
We present an observational study of the planetary nebula (PN) NGC 7354 consisting narrowband Hα and [N ii]λ6584 imaging as well low- high-dispersion long-slit spectroscopy, VLA-D radio continuum. According to our spectroscopic data, has four main structures: a quite round outer shell elliptical inner shell, collection low-excitation bright knots roughly concentrated on equatorial region nebula, two asymmetrical jet-like features, not aligned either with shells' axes, or each other. have...
We present the first part of an investigation on planetary nebula (PN) PC 22 which focuses use deep imaging and high resolution echelle spectroscopy to perform a detailed morpho-kinematical analysis. is revealed be multipolar PN emitting predominantly in [O III] displaying multiple non-symmetric outflows. Its central region found also particularly inhomogeneous with series low ionization structures (knots) located path The model obtained SHAPE indicates that i) de-projected velocities...
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 during its 2013 superoutburst subsequent quiescent state. An extended emission around source was observed up to 30 d after peak superoutburst, interpreted it as bow shock formed by quasi-continuous outflow from in quiescence. head is coincident with vector (v⊥ = 123 ± 5 km s−1) at distance 202 7 pc. object detected...
ABSTRACT We present high-resolution, long-slit optical spectra and images of the planetary nebula NGC 1514. The position velocity maps [O iii] emission line reveal complex kinematics with multiple structures. A morpho-kinematical analysis suggests an inner shell, originally spherical now distorted by several bubbles, attached outer shell. two well-defined, mid-infrared rings 1514 are not detected in our spectra, which prevented us from doing a kinematical them. Based exclusively on their...
We present narrow-band, broad-band and Wide-field Infrared Survey Explorer (WISE) archive images, high- intermediate-resolution long-slit spectra of K4-37, a planetary nebula that has never been analysed in detail. Although K4-37 appears bipolar, the morphokinematical analysis discloses existence three distinct axes additional particular directions object, indicating is multi-axis probably shaped by several bipolar outflows at different directions. A 4–6 M⊙ main-sequence progenitor estimated...
RWT 152 is one of the few known planetary nebulae with an sdO central star. We present subarcsecond red tunable filter Halpha imaging and intermediate-resolution, long-slit spectroscopy obtained OSIRIS/GTC goal analyzing its properties. The image reveals a bipolar nebula bright equatorial region multiple bubbles in main lobes. A faint circular halo surrounds nebula. nebular spectra reveal very low-excitation weak emission lines from H^+, He^+, double-ionized metals, absence neutral...
(Abridged) We present narrow-band images in several emission lines, and high- intermediate-resolution long-slit spectra of Me2-1 to investigate its morphology 3D structure, physical parameters chemical abundances. identified Me2-1: an elliptical ring; two elongated, curved structures (caps) that contain three pairs bright point-symmetric (PS) knots; a shell interior the faint halo or attached shell. The caps are observed all images, PS knots only low-excitation line ones. These also...
Abstract We present an observational study of three oint-ymmetric lanetary ebulae (PS-PNe): PC 19, He 2-429, and 1-1, whose kinematics has been previously reported in the literature. The includes analysis physical conditions chemical abundances. found that abundances 2-429 1-1 correspond to a Peimbert Type I PNe while those 19 are good agreement with IV PN. Kinematic evidence derived from proper motion measurement support classification suggest progenitor star was low-mass low-metallicity...