Parameters of Herbig Ae/Be and Vega-type stars ⋆

  title={Parameters of Herbig Ae/Be and Vega-type stars ⋆},
  author={Benjamı́n Montesinos and Carlos Eiroa and Alcione Mora and Bruno Mer{\'i}n},
  journal={Astronomy and Astrophysics},
Context. This work presents the characterization of 27 young early-type stars, most of them in the age range 1‐10 Myr, and three ‐suspected‐ hot companions of post-T Tauri stars belonging to the Lindroos binary sample. Most of these objects show IR excesses in their spectral energy distributions, which are indicati ve of the presence of disks. The work is relevant in the fields o f stellar physics, physics of disks and formation of planetary systems. Aims. The aim of the work is the… 
Massive young disks around Herbig Ae stars
Context. Herbig Ae stars (HAe) are the precursors of Vega-type systems, hence crucial objects in planet formation studies. Thus far, only a few disks associated with HAe stars have been studied using
Accretion-related properties of Herbig Ae/Be stars: Comparison with T Tauris
Context. The mass accretion rate ( u Macc) is a key parameter that has not accurately been determined for a wide sample of Herbig Ae/Be (HAeBe) stars until recently. Aims. We look for trends relating
The chemistry of disks around T Tauri and Herbig Ae/Be stars.
A comparative study of the chemistry of T Tauri and Herbig Ae/Be disks, one of the first studies to compare chemistry in the outer regions of these two types of disks, finds that the main differences are driven by the warmer temperatures of the latter, which result in a larger reservoir or water and simple organics in the inner regions and a lower mass of ices in theouter disk.
The origin of R CrA variability
Context. R CrA is the brightest member of the Coronet star-forming region and is the closest Herbig AeBe star with a spectrum dominated by emission lines. Its luminosity has been monitored since the
The far-infrared behaviour of Herbig Ae/Be discs: Herschel PACS photometry
Herbig Ae/Be objects are pre-main sequence stars surrounded by gas- and dust-rich circumstellar discs. These objects are in the throes of star and planet formation, and their characterisation informs
Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Brγ emission
Herbig Ae/Be stars lie in the mass range between low and high mass young stars, and therefore offer a unique opportunity to observe any changes in the formation processes that may occur across this
We present results of optical spectroscopic and BVRCIC photometric observations of 77 pre-main-sequence (PMS) stars in the Cepheus flare region. A total of 64 of these are newly confirmed PMS stars,
Structure of Herbig AeBe disks at the milliarcsecond scale: A statistical survey in the H band using PIONIER-VLTI
Context. It is now generally accepted that the near-infrared excess of Herbig AeBe stars originates in the dust of a circumstellar disk. Aims. The aims of this article are to infer the radial and
HD 142527 is a young pre-main-sequence star with properties indicative of the presence of a giant planet and/or a low-mass stellar companion. We have analyzed an X-Shooter/Very Large Telescope
GASPS observations of Herbig Ae/Be stars with PACS/Herschel. The atomic and molecular content of their protoplanetary discs
We observed a sample of 20 representative Herbig Ae/Be stars and five A-type debris discs with PACS onboard of Herschel. The observations were done in spectroscopic mode, and cover far-IR lines of


Dynamics of the circumstellar gas in the Herbig Ae stars BF Orionis, SV Cephei, WW Vulpeculae and XY Persei
We present high resolution (λ/∆λ = 49 000) ´ spectra of the intermediate mass, pre-main sequence stars BF Ori, SV Cep, WW Wul and XY Per. The spectra cover the range 3800−5900 A and monitor the stars
Stellar parameters and evidence of circumstellar activity for a sample of Herbig Ae/Be stars
Aims. We investigate evidence of accretion in a sample of 15 Herbig Ae/Be stars to determine whether these events originate in a remnant gaseous structure from the primordial cloud (rich in hydrogen)
The investigations of ‘zodiacal light’ of isolated AE-Herbig stars with non-periodic Algol-type minima
High linear polarization (up to 5–8%) discovered by our group in the deep minima of isolated AE-Herbig stars is discussed in the framework of the model of ‘zodiacal light’ produced by scattering
Cepheus OB2: Disk Evolution and Accretion at 3-10 Myr
We present the results of MMT observations of young stars for our study of protoplanetary disks at ages 1–10 Myr in two young clusters located in the Cepheus OB2 region: Trumpler 37 (embedded in the
On the formation of Hα line emission around classical T Tauri stars
We present radiative transfer models of the circumstellar environment of classical T Tauri stars, concentrating on the formation of the Hα emission. The wide variety of line profiles seen in
A Photometric Catalog of Herbig Ae/Be Stars and Discussion of the Nature and Cause of the Variations of UX Orionis Stars
UBVR photometric monitoring of Herbig Ae/Be stars and some related objects has been carried out at Maidanak Observatory in Uzbekistan since 1983. More than 71,000 observations of about 230 stars have
EXPORT: Spectral classification and projected rotational velocities of Vega-type and pre-main sequence stars
In this paper we present the rst comprehensive results extracted from the spectroscopic campaigns car- ried out by the EXPORT (EXoPlanetary Observational Research Team) consortium. During 1998{1999,
Herbig Ae/Be Stars in nearby OB Associations
We have carried out a study of the early-type stars in nearby OB associations spanning an age range of ∼3–16 Myr, with the aim of determining the fraction of stars that belong to the Herbig Ae/Be
Modeling of PMS Ae/Fe stars using UV spectra
Context. Spectral classification of PMS Ae/Fe stars, based on visual observations, may lead to ambiguous conclusions. Aims. We aim to reduce these ambiguities by using UV spectra for the
Discovery of δ Scuti pulsation in the Herbig Ae star VV Serpentis
Context. The study of pulsation in pre-main-sequence intermediate mass stars represents an important tool for deriving information on the stellar parameters and structure, as well as for testing the