An upper limit on the mass of the black hole in Ursa Minor dwarf galaxy (2009)
Lora, V., Sanchez-Salcedo, F. J., Raga, A., Esquivel, A.
The well-established correlations between the mass of massive black holes (BHs) in the nuclei of most studied galaxies and various global properties of their hosting galaxy lend support to the idea...
Supernova Explosions and the Triggering of Galactic Fountains and Outflows (2008)
Melioli, C., D'Ercole, A., Brighenti, F., Raga, A.
We review here the effects of supernovae (SNe) explosions on the environment of star-forming galaxies. Randomly distributed, clustered SNe explosions cause the formation of hot superbubbles that...
Multiple and Precessing Collimated Outflows in the Planetary Nebula IC 4634 (2008)
Guerrero, M. A., Miranda, L. F., Riera, A., Velazquez, P. F., Olguin, L., Vazquez, R., ...
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 of this PN using archival HST WFPC2 and ground-based...
Galactic Outflows and the pollution of the Galactic Environment by Supernovae (2008)
Melioli, C., Ercole, A. D, Brighenti, F., Raga, A.
We here explore the effects of the SN explosions into the environment of star-forming galaxies like the Milky Way. Successive randomly distributed and clustered SNe explosions cause the formation of...
Melioli, C., Leão, M. R. M., Raga, A.
In the present study, considering the physical conditions that are relevant interactions between supernova remnants (SNRs) and dense molecular clouds for triggering star formation we have built a...
A precessing jet model for the PN K 3-35: simulated radio-continuum emission (2007)
Velazquez, P., Gomez, Y., Esquivel, A., Raga, A.
The bipolar morphology of the planetary nebula (PN) K 3-35 observed in radio-continuum images was modelled with 3D hydrodynamic simulations with the adaptive grid code yguazu-a. We find that the...
In the present study, considering the physical conditions that are relevant in interactions between supernova remnants (SNRs) and dense molecular clouds for triggering star formation we have built a...
In this work we are interested to study the by-products of SNR-clouds in a starburst (SB) system. These interactions can have an important role in the recycling of matter from the clouds to the ISM...
Tephritoidea (Diptera) species infesting Myrtaceae fruits in the State of Sâo Paulo, Brazil (2005)
Raga, A., Amaro Machado, Rogerio, Souza Filho, M. F., Eidi Sato, Mário, Siloto, R. Cássio
Um levantamento foi conduzido entre agosto 1997 e janeiro de 2003 para avaliar a diversidade de Tephritoidea em 15 espécies de Myrtaceae coletadas no Estado de São Paulo, Brasil. Um total de 38.386...
Tephritoidea (Diptera) species infesting Myrtaceae fruits in the State of Sâo Paulo, Brazil (2005)
Raga, A., Amaro Machado, Rogerio, Souza Filho, M. F., Eidi Sato, Mário, Siloto, R. Cássio
Um levantamento foi conduzido entre agosto 1997 e janeiro de 2003 para avaliar a diversidade de Tephritoidea em 15 espécies de Myrtaceae coletadas no Estado de São Paulo, Brasil. Um total de 38.386...
The x-ray luminosities of Herbig-Haro objects (2004)
Velazquez, A. C., Noriega-Crespo, P. F., Raga, A.
We find that our analytic model reproduces the observed X-ray luminosity of HH 2, and we propose that HH 80/81 is a good candidate for future observations with Chandra.
A 3-mode, Variable Velocity Jet Model for HH 34 (2004)
Variable ejection velocity jet models can qualitatively explain the appearance of successive working surfaces in Herbig-Haro (HH) jets. This paper presents an attempt to explore which features of the...
Noriega-Crespo, A., Rodriguez, L., Delgado, V., Gomez, Y., Reipurth, B., Torrelles, J., ...
Using the Very Large Array, we have carried out new, sensitive radio continuum observations at 6 and 3.6 cm of the HH 1-2 region. The comparison between the 6 cm maps made from data taken in 1986.2...
Optical and Near Infrared Study of the Cepheus E Outflow, a Very Low Excitation Object (2004)
Noreiga-Crespo, A., Ayala, S., Garnavich, P., Curiel, S., Raga, A., Bohm, K., ...
In this study, we explore the link between the physical properties of the outflow as determined from optical imaging and spectroscopy, and compare these results with those obtained from observations...
Hydrodynamical interaction between an accretion flow and a stellar wind (2004)
Mendoza, S., Canto, J., Raga, A.
Molecular clouds in the interstellar medium suffer gravitational instabilities that lead to the formation of one or multiple stars. A recently formed star inside a cold cloud communicates its...
Exoplanet recognition using a wavelet analysis technique (2004)
The recognition of a planet orbiting around a star (and in general of a faint companion in a binary system) in direct imaging observations is limited at distances smaller than around 1" by the...
Unveiling the structure of the planetary nebula M 2-48: Kinematics and physical conditions (2002)
Lopez-Martin, L., Lopez, J. A., Esteban, C., Vazquez, R., Raga, A., Torrelles, J. M., ...
The kinematics and physical conditions of the bipolar planetary nebula M 2-48 are analysed from high and low dispersion long-slit spectra. Previous CCD narrow-band optical observations have suggested...
Occurrence of fruit flies in coffee varieties in the State of Sao Paulo, Brazil (2002)
Siloto, R. Cássio, Souza Filho, M. F., Sato, M. E., Zucchi, R. A., Raga, A.
A 3-mode, Variable Velocity Jet Model for HH 34 (1998)
Variable ejection velocity jet models can qualitatively explain the appearance of successive working surfaces in Herbig-Haro (HH) jets. This paper presents an attempt to explore which features of the...
Highly Collimated Molecular Hydrogen Jets Near IRAS 05487+0255: NIR Imaging and Spectroscopy (1997)
Garnavich, P., Noriega-Crespo, A., Raga, A., Bohm, K. H.
We present new narrow-band near-infrared images together with K band spectra of highly collimated bipolar jets close to the IRAS 05487+0255 source. The jets are located at 50" West of the Herbig-Haro...
Raga, A., Mellema, G., Lundqvist, P.
We have chosen a reduced set of 18 ionization rate equations (for ions of H, C, N, O, S and Ne), which allow us to obtain a moderately accurate estimate of the non-equilibrium radiative cooling...
RAGA,A, YASUOKA,S.T, AMORIM,E.O, SATO,M.E, SUPLICY FILHO,N, FARIA,J.T. De
O objetivo deste trabalho foi determinar as doses de radiação gama que impedissem a emergência de adultos de Ceratitis capitata, a partir de ovos irradiados em dieta artificial e em frutos de...
Sato,M.E., Raga,A., Cerávolo,L.C., Cezário,A.C., Rossi,A.C.
Foi conduzido experimento com o objetivo de estudar o efeito de alguns acaricidas sobre Brevipalpus phoenicis (Geijskes,1939) (AcarirTenuipalpidae) e ácaros predadores (Phytoseiidae), em citros. Os...