The nearby eclipsing stellar system $\delta$ Velorum - I. Origin of the infrared excess from VISIR and NACO imaging

  title={The nearby eclipsing stellar system \$\delta\$ Velorum - I. Origin of the infrared excess from VISIR and NACO imaging},
  author={Pierre Kervella and Fr'ed'eric Th'evenin and Monika G. Petr-Gotzens},
  journal={Astronomy and Astrophysics},
Context. The triple stellar system δ Vel system presents a significant infrared excess, whose ori gin is still being debated. A large infrared bow shock has been discovered using Spitzer/MIPS observations. Although it appears as a significant cont ributor to the measured IR excess, the possibility exists that a circumste llar IR excess is present around the stars of the system. Aims. The objective of the present VISIR and NACO observations is to identify whether one of the stars of theδ Vel… 

The nearby eclipsing stellar system δ Velorum - IV. Differential astrometry with VLT/NACO at the 100 microarcsecond level

Context. The stellar system Vel contains the brightest eclipsing binary in the southern sky ( Vel A), and a nearby third star located 0:6 00 away ( Vel B). The proximity of Vel B (usable as a

The nearby eclipsing stellar system δ Velorum - II. First reliable orbit for the eclipsing pair

Context. The nearby multiple system δ Velorum contains a widely detached eclipsing binary and a third component. Aims. We take advantage of this system offering the opportunity to determine the set

The nearby eclipsing stellar system δ Velorum - III. Self-consistent fundamental parameters and distance

The triple stellar system delta Vel (composed of two A-type and one F-type main sequence stars) is particularly interesting as it contains one of the nearest and brightest eclipsing binaries. It

Interferometry, spectroscopy and high precision astrometry of δ Velorum

The bright southern star δ Vel is a multiple system comprising at least three stars, with two of these stars in an eclipsing binary system. We searched for infrared excess and determined fundamental


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The problem of modeling the approach of the Solar system to a massive star on the basis of numerical integration of the equations of motion of objects of the Oort cloud is considered. On the basis of



Interferometric observations of the multiple stellar system δ Velorum

Context. The nearby (∼24 pc) triple stellar system δ Velorum contains a close, eclipsing binary (Aa, Ab) discovered in 2000. Multiple systems provide an opportunity to determine the set of

Modeling the Infrared Bow Shock at δ Velorum: Implications for Studies of Debris Disks and λ Boötis Stars

We have discovered a bow shock shaped mid-infrared excess region in front of δ Velorum using 24 μm observations obtained with the Multiband Imaging Photometer for Spitzer (MIPS). Although the bow

Mid-Infrared Imaging of Candidate Vega-like Systems

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Context: The geometry of the circumstellar envelopes (CSE) surrounding Be stars is still uncertain, although it is often assumed that they are formed by a disk around the stellar equator and a hot

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Context. B[e] stars are expected to possess dusty circumstellar environments, which are responsible for a strong infrared (IR) excess. Aims. Using single-dish diffraction-limited imaging in the

HD 97048: a closer look at the disk

Aims.Large ground-based instruments, like VISIR on the VLT, providing diffraction-limited (~0.3 arcsec) images in the mid-infrared where strong PAH features appear, enable us to see the flaring

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We report new Spitzer 24 μm photometry of 76 main-sequence A-type stars. We combine these results with previously reported Spitzer 24 μm data and 24 and 25 μm photometry from the Infrared Space

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Observations of the standard late type M8 star LHS 2397aA were obtained at the ESO-VLT 8 m telescope "Yepun" using the NAOS/CONICA Adaptive Optics facility. The observations were taken during the

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We present high spatial resolution mid- and far-infrared images of the Vega debris disk obtained with the Multiband Imaging Photometer for Spitzer (MIPS). The disk is well resolved, and its angular