Person: Zamorano Calvo, Jaime
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First Name
Jaime
Last Name
Zamorano Calvo
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Física de la Tierra y Astrofísica
Area
Astronomía y Astrofísica
Identifiers
9 results
Search Results
Now showing 1 - 9 of 9
Item Spectroscopic properties and luminosity distribution of the Universidad Complutense de Madrid survey galaxies(Astrophysical journal, 1997) Gallego Maestro, Jesús; Zamorano Calvo, Jaime; Rego Fernández, Manuel; Vitores, A. G.A spectroscopic analysis of the entire sample of Ha emission-line galaxies (ELGs) contained in lists 1 and 2 of the Universidad Complutense de Madrid (UCM) objective-prism survey is presented. A significant fraction (59%) of star-forming galaxies with low-ionization or high-extinction properties has been found. This kind of ELG is only incompletely detected in the blue or in other ELG surveys. We have found evidence for evolution among some of the different ELG classes. A comparison between the populations detected by the Case, Kiso, University of Michigan, and UCM surveys is presented. We conclude that a deep H_α survey is better able to sample all the ages, evolutionary stages, and luminosities of currently star-forming galaxies than other surveys using blue emission lines or colors. Finally, the luminosity and spatial distributions of the UCM galaxies are determined. The contribution of the newly found, currently star-forming ELGs provides new clues to galaxy evolution and has to be taken into account when trying to consider the density of ELGs and total star formation rate in the universe.Item Photometric and morphological analysis of UCM galaxies .2. Statistical results and interpretation(Astronomy & astrophysics supplement series, 1996) Vitores, A. G.; Zamorano Calvo, Jaime; Rego Fernández, Manuel; Gallego Maestro, Jesús; Alonso, O.We present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs) selected by the presence of H_α emission in low resolution objective-prism spectra. In this work, a total of 212 objects from the UCM survey have been photometrically and morphologically characterized. In a previous paper, the observations, basic reductions and morphological classification for the UCM objects were presented. Here, we analyse the statistical properties of the sample and their interpretations. The main results obtained are as follows: (1) Our survey is specially effective in the detection of ELGs smaller and less luminous than normal spirals (the median values of the UCM sample are M_r = -20.6 and D_24 = 19.4 kpc, for H_0 = 50 km s^-1 Mpc^-1). (2) The sample presents a very heterogeneous morphological population of galaxies. There is a clear predominance of late-type galaxies, with 66% being Sb or later. (3) We have found a set of galaxies specially interesting. In particular, we propose 9 candidates to BCD (blue compact dwarf galaxy), five of them previously unknown. (4) About 10% of the ELGs of the sample show typical parameters of S0 types, and in the subsample of 16 UCM interacting galaxies, 25% are S0 type galaxies. (5) In the set of UCM galaxies inside the Coma cluster, 71% exhibit Hubble types Sb or later.Item Properties of UCM 2303+1702, a new seyfert 2 galaxy(Astronomy & Astrophysics, 1994) Rego Fernández, Manuel; Zamorano Calvo, Jaime; Gallego Maestro, Jesús; Vitores, A. G.The galaxy UCM 2303 + 1702, not previously known, was identified during the Universidad Complutense de Madrid (UCM) objective-prism survey. The optical spectrum displays emission lines with a blueward asymmetry. Forbidden lines cover a wide range of ionization exhibiting full width at half maximum (FWHM) unusually broad. An analysis of ionization range and the emission line ratios measured in the spectrum leads to a Seyfert 2 classification. The contour map of isophotes of the CCD image shows an Sbc-Sc+ spiral, nearly face-on, in disagreement with previous works reporting an anticorrelation between the [0_III] line width and the Hubble morphological type in Seyfert parent galaxies. High quality IRAS coadded data have been used to study the far-infrared properties.Item Discovery of an emitting ring in the seyfert 1 galaxy UCM 2329+2500(Astronomy and astrophysics, 1994) Gallego Maestro, Jesús; Zamorano Calvo, Jaime; Rego Fernández, Manuel; Vitores, A. G.We analyze a rather interesting galaxy discovered during the UCM survey for new Hα emission-line galaxies. The new galaxy UCM 2329+2500 presents a compact core that hosts a Seyfert 1 nucleus. The spectrum of the Seyfert nucleus presents broad components (FWHM=8000 km s^-1) and asymmetric profiles at the Balmer lines showing a secondary peak more apparent on the Hβ line and also observed in the Hα deblended line. Only traces of profile variability have been detected during spectroscopic observations at four different dates spanning 29 months. Eight kpc away from the nucleus, a ring-like structure that surrounds the core is observed. A long slit spectrum at PA 45° has revealed emission lines coming from both sides of the ring. The emission detected is prominent at a condensation observed on the red image. Star formation is the most plausible explanation. A high obscuration is also observed. All this information is coherent with a galactic encounter scenario.Item UCM 2257+2438, a new narrow-line seyfert 1 galaxy(Astronomical journal, 1992) Zamorano Calvo, Jaime; Gallego Maestro, Jesús; Rego Fernández, Manuel; Vitores, A. G.; González Riestra, R.Multiwavelength observations of the galaxy UCM 2257+2438 found in the Universidad Complutense of Madrid (UCM) objective-prism survey are reported. The optic spectroscopy, CCD imaging, near-infrared and IRAS photometric data suggest that this object is a narrow-line Seyfert 1 placed in the nucleus of a Sa nearly face-on galaxy with a significant contribution from starlight.Item Photometric and morphological analysis of UCM galaxies. I. Observations and reductions. Morphological classifications(Astronomy & astrophysics supplement series, 1996) Vitores, A. G.; Zamorano Calvo, Jaime; Rego Fernández, Manuel; Alonso, O; Gallego Maestro, JesúsWe present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs), selected by the presence of H_α emission in low-resolution objective prism spectra. In this work we characterize photometrically and morphologically a total of 212 objects from the UCM survey. This Paper presents the observations and basic reductions, and lists a set of photometric parameters calculated for each UCM object. In addition, for the first time in a ELGs sample, we have determined the morphological classification of the objects using simultaneously five different criteria.Item Survey of emission-line galaxies: Universidad Complutense de Madrid list(Astrophysical journal supplement series, 1994) Zamorano Calvo, Jaime; Rego Fernández, Manuel; Gallego Maestro, Jesús; Vitores, A. G.; González Riestra, R.; Rodríguez Caderot, GraciaA low-dispersion objective-prism survey for low-redshift emission-line galaxies (ELGs) is being carried out by the University Complutense de Madrid with the Schmidt telescope at the German-Spanish Observatory of Calar Alto (Almeria, Spain). A 4° full aperture prism, which provides a dispersion of 1950 Å mm^-1, and IIIaF emulsion combination has been used to search for ELGs selected by the presence of H_α emission in their spectra. Our survey has proved to be able to recover objects already found by similar surveys with different techniques and, what is more important, to discover new objects not previously cataloged. A compilation of descriptions and positions, along with finding charts when necessary, is presented for 160 extragalactic emission-line objects. This is the first list, which contains objects located in a region of the sky covering 270 deg^2 in 10 fields near α = 0^h and δ = 20°.Item Survey for emission-line galaxies: Universidad Complutense de Madrid list 2(Astrophysical journal supplement series, 1996) Zamorano Calvo, Jaime; Gallego Maestro, Jesús; Rego Fernández, Manuel; Vitores, A. G.; Alonso, O.A low-dispersion objective-prism survey for low-redshift emission-line galaxies (ELGs) is being carried out by the Universidad Complutense de Madrid with the Schmidt telescope at the German-Spanish Observatory of Calar Alto (Almeria, Spain). A 4° full-aperture prism, which provides a dispersion of 1950 Å mm^-1, and IIIa-F emulsion combination has been used to search for ELGs selected by the presence of H_α emission in their spectra. A compilation of descriptions and positions, along with finding charts, is presented for 103 emission-line objects. This is the second list, which contains objects located ina region of the sky covering 201.4 deg^2 in seven fields near α = 15^h and δ = 25°.Item Observations of a complete sample of Hα emission-line galaxies. Long-slit spectroscopy of galaxies in UCM lists 1 and 2(Astronomy & astrophysics supplement series, 1996) Gallego Maestro, Jesús; Zamorano Calvo, Jaime; Rego Fernández, Manuel; Alonso, O.; Vitores, A. G.Spectroscopic observations for the full sample of Her emission-line galaxy candidates (ELGs) from the Universidad Complutense de Madrid objective-prism survey Lists 1 and 2 have been obtained in order to investigate fully the properties of the survey constituents as well as the selection characteristics and completeness limits of the survey itself. The spectroscopic data include redshifts, line fluxes, equivalent widths, emission-line ratios, optical reddening estimates and synthesized color indexes. We find that 74% of the objects in this sample do exhibit emission Lines. We compare our observational data, with parameters given in the published survey lists in order to assess the usefulness of the latter. The different emission-line galaxies have been classified according to their spectra in several groups. Gray-scale images of the CCD spectra near the main emission lines, spatial profiles at the continuum and the Line for [OIII] λ5007 and Hα lines, as well as plots of the coadded spectra of selected galaxies are presented, and a number of peculiar objects are described.