664 citations · 2k across the 51 of their papers we have counts for
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Properties of the ionized gas in HH202. I: Results from integral field spectroscopy with PMAS
A. Mesa-Delgado, L. López-Martín, C. Esteban +2
We present results from integral field spectroscopy with the Potsdam multi-Aperture Spectrograph of the head of the Herbig-Haro object HH 202 with a spatial sampling of 1"x1". We h…
Fluorescent excitation of Balmer lines in gaseous nebulae: case D
V. Luridiana, S. Simon-Diaz, M. Cervino +3
(abridged) Non-ionizing stellar continua are a source of photons for continuum pumping in the hydrogen Lyman transitions. In the environments where these transitions are optically…
On surface brightness fluctuations: probabilistic and statistical bases I: Stellar population and theoretical SBF
M. Cervino, V. Luridiana, L. Jamet
This work aims to provide a theoretical formulation of Surface Brightness Fluctuations (SBF) in the framework of probabilistic synthesis models, and to distinguish between the diff…
Results of an analysis of SDSS galaxies in the VO
W. Schoenell, M. Cervino, R. Cid Fernandes +6
We present here the VO access to the results of an analysis of the spectra of Sloan Digital Sky Survey (SDSS) galaxies performed with the STARLIGHT code by Cid Fernandes et al. (20…
Synthesis models in a probabilistic framework: metrics of fitting
M. Cervino, V. Luridiana
In general, synthesis models provide the mean value of the distribution of possible integrated luminosities, this distribution (and not only its mean value) being the actual descri…
Synthesis models in the VO framework
M. Cervino, E. Terlevich, R. Terlevich +4
The theory interest group in the International Virtual Observatory Alliance (IVOA) has the goal of ensuring that theoretical data and services are taken into account in the IVOA st…
A probabilistic formulation of evolutionary synthesis models: implications for SED fittings
M. Cervino, V. Luridiana
Evolutionary synthesis models (ESM) have been extensively used to obtain the star formation history in galaxies by means of SED fitting. Implicit in this use of ESM is that (a) for…
Sampling effects in the emission line spectra of HII regions
M. Villaverde, V. Luridiana, M. Cervino
The combination of stellar population synthesis models and photoionization models allows a better understanding of the spectral features of HII regions and HII galaxies. In this wo…
Gamow Legacy and the Primordial Abundance of Light Elements
E. Terlevich, R. Terlevich, V. Luridiana
The presently accepted "Theory of the Universe" was pioneered 60 years ago by Gamow, Alpher and Herman. As a consequence of the, later dubbed, Hot Big-Bang, matter was neutrons, an…
On the Primordial Helium Abundance and the DeltaY/DeltaO Ratio
M. Peimbert, V. Luridiana, A. Peimbert +1
We present a review on the determination of the primordial helium abundance, Yp, based on the study of hydrogen and helium recombination lines in extragalactic H II regions. We als…
Revised Primordial Helium Abundance Based on New Atomic Data
M. Peimbert, V. Luridiana, A. Peimbert
We have derived a primordial helium abundance of Yp = 0.2477 +- 0.0029, based on new atomic physics computations of the recombination coefficients of He I and of the collisional ex…
From deterministic to probabilistic population synthesis (why synthesis models are not what we thought they were, and how they can be much more than that)
V. Luridiana, M. Cervino
For a number of reasons, the properties of integrated stellar populations are distributed. Traditional synthesis models usually return the mean value of such distribution, and a pe…
Revisiting and assessing uncertainties in stellar populations synthesis models
M. Cervino, V. Luridiana
In this review we address the uncertainties implicit in evolutionary synthesis model computations. After describing the general structure of synthesis codes, we discuss several sou…
Confidence limits of evolutionary synthesis models. IV Moving forward to a probabilistic formulation
M. Cervino, V. Luridiana, N. Cervino-Luridiana
Synthesis models predict the integrated properties of stellar populations. Several problems exist in this field, mostly related to the fact that integrated properties are distribut…
The effect of collisional enhancement of Balmer lines on the determination of the primordial helium abundance
V. Luridiana, A. Peimbert, M. Peimbert +1
This paper describes a new determination of the primordial helium abundance (Y_P), based on the abundance analysis of five metal-poor extragalactic HII regions. For three regions o…
Physical limits to the validity of synthesis models: The Lowest Luminosity Limit
M. Cervino, V. Luridiana
(abriged) In this paper we establish a Lowest Luminosity Limit (LLL) for the use of synthesis codes. The limit is defined by the following statement: The total luminosity of the cl…
Physical conditions in NGC 6543 from ISO and HST data and the pitfalls of temperature maps
V. Luridiana, E. Perez, M. Cervino
We determine the physical conditions in NGC 6543, obtaining two different estimates of the electron temperature (T_e) and one estimate of the electron density (N_e). The electron t…
Photoionization Models of Metal-poor Extragalactic HII Regions and the Primordial Helium Abundance
V. Luridiana, A. Peimbert, M. Peimbert
We discuss the effects of collisional enhancement of Balmer lines on the determination of the primordial helium abundance. To this aim, we present a photoionization model of the me…
Statistical Synthesis Models
M. Cervino, V. Luridiana
In this contribution we evaluate the minimal cluster mass for which the effects of an incomplete sampling of the Initial Mass Function (IMF) cannot be neglected. This minimal clust…
Physical conditions in the O++ zone from ISO and HST data. NGC 6543 revisited
V. Luridiana, E. Perez, M. Cervino
We revise the physical conditions in the O++ zone of the planetary nebula NGC 6543, obtaining two different estimates of the electron temperature (Te) and one estimate of the elect…
The primordial Helium abundance
V. Luridiana
The primordial abundance of 4He, Y_P, is one of the hottest themes in present-day astronomy, mostly due to its cosmological relevance. The disagreement between different determinat…
Chemical Abundances of NGC 5461 and NGC 5471 derived from Echelle Spectrophotometry
V. Luridiana, C. Esteban, M. Peimbert +1
We present high resolution spectroscopic data of the two giant extragalactic H II regions NGC 5461 and NGC 5471 in M101, which have been obtained with the 2.1-m telescope of the Ob…
Confidence Limits of Evolutionary Synthesis Models
M. Cervino, V. Luridiana
The probabilistic nature of the IMF in stellar systems implies that clusters of the same mass and age do not present the same unique values of their observed parameters. Instead th…
Can stellar winds account for temperature fluctuations in H II regions? The case of NGC 2363
V. Luridiana, M. Cervino, L. Binette
We compare the rate of kinetic energy injected by stellar winds into the extragalactic H II region NGC 2363 to the luminosity needed to feed the observed temperature fluctuations.…