MWC 297: a young high-mass star rotating at critical velocity

  title={MWC 297: a young high-mass star rotating at critical velocity},
  author={Bram Acke and Tijl Verhoelst and Mario van den Ancker and Pieter D. Deroo and Christoffel Waelkens and Olivier Chesneau and Eric Tatulli and Myriam Benisty and Elena Puga and L. B. F. M. Waters and A. P. Verhoeff and A. de Koter},
  journal={Astronomy and Astrophysics},
Context. MWC 297 is a nearby young massive B[e] star. The central star is attenuated by 8 mag in the optical and has a high projected rotational velocity of 350 km s −1 . Despite the wealth of published observations, the nature of this object and its circumstellar environment is not understood very well. Aims. With the present paper, we intend to shed light on the geometrical structure of the circumstellar matter that is responsible for the near- to mid-infrared flux excess. Methods. The H-band… 

Gas dynamics in the inner few AU around the Herbig B[e] star MWC297: Indications of a disk wind from kinematic modeling and velocity-resolved interferometric imaging

We present near-infrared AMBER (R = 12, 000) and CRIRES (R = 100, 000) observations of the Herbig B[e] star MWC297 in the hydrogen Br-gamma-line. Using the VLTI unit telescopes, we obtained a

First L-Band Interferometric Observations of a Young Stellar Object: Probing the Circumstellar Environment of MWC 419

We present spatially resolved K- and L-band spectra (at spectral resolution R = 230 and R = 60, respectively) of MWC 419, a Herbig Ae/Be star. The data were obtained simultaneously with a new

VLTI/AMBER spectro-interferometry of the Herbig Be star MWC 297 with spectral resolution 12 000

Context. Circumstellar disks and outflows play a fundamental role in star formation. Infrared spectro-interferometry allows the inner accretion-ejection region to be resolved. Aims. We study the disk

Mid-infrared interferometry of the massive young stellar object NGC 3603 - IRS 9A

Context. Very few massive young stellar objects (MYSO) have been studied in the infrared at high angular resolution due to their rarity and large associated extinction. We present observations and

Circumstellar disks around Herbig Be stars

Aims. Our goal is to investigate the properties of the circumstellar disks around intermediate mass stars to determine their occurrence, lifetime and evolution. Methods. We completed a search for

Tracers of discs and winds around intermediate- and high-mass young stellar objects

We present a study of the kinematical properties of a small sample of nearby near-infrared bright massive and intermediate-mass young stellar objects using emission lines sensitive to discs and

A mid-IR study of the circumstellar environment of Herbig Be stars

Context. The study of the formation of massive stars is complicated because of the short times scales, large distances, and obscuring natal clouds. There are observational and theoretical indications

Scanning Disk Rings and Winds in CO at 0.01–10 au: A High-resolution M-band Spectroscopy Survey with IRTF-iSHELL

We present an overview and first results from a M-band spectroscopic survey of planet-forming disks performed with iSHELL on the Infrared Telescope Facility, using two slits that provide resolving

Revealing the sub-AU asymmetries of the inner dust rim in the disk around the Herbig Ae star R Coronae Austrinae

Context. Unveiling the structure of the disks around intermediate-mass pre-main-sequence stars (Herbig Ae/Be stars) is essential for our understanding of the star and planet formation process. In



An Evolved Disk Surrounding the Massive Main-Sequence Star MWC 297?

We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the (J = 2-1) rotational transitions of 12CO,13CO,

Disk and wind interaction in the young stellar object MWC 297 spatially resolved with VLTI/AMBER

The young stellar object MWC 297 is an embedded B1.5Ve star exhibiting strong hydrogen emission lines and a strong near-infrared continuum excess. This object has been observed with the VLT

An ISO investigation of the MWC 297 circumstellar region

The ISO-SWS full grating spectrum (2.3-45 μ m) of the Herbig Be star MWC 297 is presented. The spectrum is dominated by a strong continuum with superimposed emission lines and features both in

Spatially Resolved Circumstellar Structure of Herbig Ae/Be Stars in the Near-Infrared

We have conducted the first systematic study of Herbig Ae/Be stars using the technique of long baseline stellar interferometry in the near-infrared, with the objective of characterizing the

Hα spectropolarimetry of B[e] and Herbig Be stars

We present the results of medium resolution (�v� 60 km s 1 ) spectropolarimetric observations across Hof a sample of B(e) and Herbig Be objects. A change in linear polarization across His detected in

Passive Irradiated Circumstellar Disks with an Inner Hole

A model for irradiated dust disks around Herbig Ae stars is proposed. The model is based on the flaring disk model given by Chiang and Goldreich in 1997, but with the central regions of the disk

Classical Be Stars

Recent results for classical Be stars are reviewed and links to general astrophysics are presented. Classical Be stars are B‐type stars close to the main sequence that exhibit line emission over the

The Near-Infrared Size-Luminosity Relations for Herbig Ae/Be Disks

We report the results of a sensitive K-band survey of Herbig Ae/Be disk sizes using the 85 m baseline Keck Interferometer. Targets were chosen to span the maximum range of stellar properties to probe

B[e] stars - VI. MWC 297 = IRAS 18250-0351

On the basis of spectroscopic CCD material obtained at the Haute Provence Observatory, we provide line identifications and equivalent width measurements in the wavelength region 4100 - 8900 A  of the

Collapsars: Gamma-Ray Bursts and Explosions in “Failed Supernovae”

Using a two-dimensional hydrodynamics code (PROMETHEUS), we explore the continued evolution of rotating helium stars, Mα ≳ 10 M☉, in which iron-core collapse does not produce a successful outgoing