Search results for "STELLA"

Valencianos: El Excmo. Sr. capitan general, todas las dignas autoridades de esta capital ... acaba de secundar el glorioso alzamiento, cuya banderá t…

Signat a la fi: Carlos M. de la Torre Precedeix al tít.: Gobierno de la província de Valencia 1854 any de "la Vicalvarada"

La Divina Commedia di Dante Alighieri. Traduzione in dialetto siciliano

2009

Seguidillas nuevas a la mejor pastora Maria santissima

Segons el catàleg on-line de la BNE [02-07-2007] El Mystico Piscator de Salamanca és pseudònim de Diego Torres de Villarroel Grav. xil. enmarcat de "La Divina Pastora" Bada tip. al final Sign.: [ ]2 Text a dues col Reclams

L'opera di Filippo Guastella. Un riuscito esempio di traslazione lirico-dialettale.

2009

Avisos de una dama á una amiga suya : sobre el perjudicial uso de las cotillas.

Filets Text a 1 col. - Reclams Sign.: A6

Observational Approach and Perspective

1983

Well you did not cover more than half of my planned talk! (laughter). Let me comment on interferometric techniques, in particular speckle imaging which you mentioned. Doing speckle imaging with the largest telescopes now available will not give you better than the theoretical resolving power of the telescope. With a 4m telescope that is about 30 marc sec in the visible. That happens to be the radius of the supergiant Betelguese. So you are not going to achieve much with speckle imaging on these stars. One technique which has not been adequately exploited is that of lunar occultation which can give much better angular resolution than speckle, of the order of 2-3 marc sec. By using suitably c…

IPHAS-selected classical Be stars

2016

We present a semi-automatic procedure to obtain fundamental physical parameters and distances of classical Be (CBe) stars, based on the Barbier-Chalonge-Divan (BCD) spectrophotometric system. Our aim is to apply this procedure to a large sample of CBe stars detected by the IPHAS photometric survey, to determine their fundamental physical parameters and to explore their suitability as galactic structure tracers. In this paper we describe the methodology used and the validation of the procedure by comparing our results with those obtained from different independent astrophysical techniques for subsamples of stars in common with other studies. We also present a test case study of the galactic …

Trumpler 14 and 16 in the Carina nebula

2017

We present the first extensive spectroscopic study of the global population in star clusters Trumpler 16, Trumpler 14, and Collinder 232 in the Carina nebula, using data from the Gaia-ESO Survey, down to solar-mass stars. In addition to the standard homogeneous survey data reduction, a special processing was applied here because of the bright nebulosity surrounding Carina stars. We find about 400 good candidate members ranging from OB types down to slightly subsolar masses. About 100 heavily reddened early-type Carina members found here were previously unrecognized or poorly classified, including two candidate O stars and several candidate Herbig Ae/Be stars. Their large brightness makes th…

Be stars in the exofield of CoRoT. II.

2018

The class of Be stars are the epitome of rapid rotators in the main sequence. These stars are privileged candidates for studying the incidence of rotation on the stellar internal structure and on non-radial pulsations. Pulsations are considered possible mechanisms to trigger mass-ejection phenomena required to build up the circumstellar disks of Be stars. Time series analyses of the light curves of 15 faint Be stars observed with the CoRoT satellite were performed to obtain the distribution of non-radial pulsation (NRP) frequencies in their power spectra at epochs with and without light outbursts and to discriminate pulsations from rotation-related photometric variations. Standard Fourier t…

Evidence of a radiation belt around a brown dwarf

2023

Radio observations of ultracool dwarfs, objects comprising brown dwarfs and the very lowest mass stars, have mainly focused on analyzing their light-curve and spectral energy distributions providing valuable insights into their magnetic fields. However, spatially-resolved studies of such magnetospheres have been elusive so far. Radio interferometric observations of the brown dwarf LSR J1835+3259 reveal an extended magnetosphere with a morphology compatible with the presence of a radiation belt, similar to that of Jupiter and Earth, consisting of energetic particles confined via magnetic mirroring. Our finding suggests that radio emitting ultracool dwarfs may behave as scaled up versions of …