Mid-Infrared Resolution of a 3 AU Radius Debris Disk around ζ Leporis

  title={Mid-Infrared Resolution of a 3 AU Radius Debris Disk around $\zeta$ Leporis},
  author={Margaret Moerchen and C. M. Telesco and Christopher Packham and Thomas J. Kehoe},
  journal={The Astrophysical Journal Letters},
  pages={L109 - L112}
We present subarcsecond-resolution mid-infrared images of the debris disk surrounding the 230 Myr old A star ζ Lep. Our data obtained with T-ReCS at Gemini South show the source to be unresolved at 10.4 μm but clearly extended at 18.3 μm. Quadratic subtraction of the PSF profile from that of ζ Lep implies a characteristic radius for the dust disk of 3 AU, which is comparable in size to our solar system's asteroid belt. Simple models suggest that the 18 μm flux is well approximated by two… 

Resolved debris disc emission around η Telescopii: a young solar system or ongoing planet formation?

Aims. 60% of the A star members of the 12 Myr oldβ Pictoris moving group (BPMG) show significant excess emissi on in the mid-infrared, several million years after the proto-plane tary disk is thought

12 and 18 μm Images of Dust Surrounding HD 32297

We present the first subarcsecond-resolution images at multiple mid-IR wavelengths of the thermally emitting dust around the A0 star HD 32297. Our observations with T-ReCS at Gemini South reveal a


We present observations of the debris disk around γ Doradus, an F1V star, from the Herschel Key Programme DEBRIS (Disc Emission via Bias-free Reconnaissance in the Infrared/Submillimetre). The disk


We have obtained subarcsecond mid-IR images of a sample of debris disks within 100 pc. For our sample of 19 A-type debris disk candidates chosen for their IR excess, we have resolved, for the first

Mid-Infrared Imaging of Two Circumstellar Disks: the cases ofHD 179218 and Epsilon Eridani.

Recently, large ground-based telescopes and the new generation of astronomical instrumentation have allowed us to examine the environments of young stellar objects with high angular resolution.


We present nulling interferometric observations of six nearby main-sequence stars (α CrB, α Lyr, β Leo, γ Ser, ϵ Eri, and ζ Lep). None of the stars show evidence for a positive detection of warm

A near-infrared interferometric survey of debris-disc stars - III. First statistics based on 42 stars observed with CHARA/FLUOR

Context. Dust is expected to be ubiquitous in extrasolar planetary systems owing to the dynamical activity of minor bodies. Inner dust populations are, however, still poorly known because of the high

The Exceptionally Large Debris Disk around γ Ophiuchi

Spitzer images resolve the debris disk around γ Ophiuchi at both 24 and 70 μm. The resolved images suggest a disk radius of ~520 AU at 70 μm and ≳ 260 AU at 24 μm. The images, along with a consistent

Warm dusty discs: exploring the A star 24 μm debris population

Aims. Studies of the debris disc phenomenon have shown that most systems are analogous to the Edgeworth-Kuiper belt (EKB). In this study we aim to determine how many of the IRAS 25 μm excesses

Multiwavelength modelling of the β Leo debris disc: one, two or three planetesimal populations?

In this paper we present a model of the β Leo debris disc, with an emphasis on modelling the resolved Photodetector Array Camera and Spectrometer (PACS) images obtained as a part of the Herschel key



Mid-infrared images of β Pictoris and the possible role of planetesimal collisions in the central disk

Thermal infrared images of the central disk imply that the brightness asymmetry results from the presence of a bright clump composed of particles that may differ in size from dust elsewhere in the disk, which is suggested to result from the collisional grinding of resonantly trapped planetesimals or the cataclysmic break-up of a planetesimal.

Resolution of the circumstellar disk of β Pictoris at 10 and 20 µm

The A5 dwarf β Pic is a star that may be surrounded by a proto-planetary disk. Among the stars discovered with the Infrared Astronomical Satellite (IRAS) to have far-infrared excesses from

A Possible Massive Asteroid Belt around ζ Leporis

We have used the Keck I telescope to image at 11.7 and 17.9 μm the dust emission around ζ Leporis, a main-sequence A-type star at 21.5 pc from the Sun with an infrared excess. The excess is at most

The Vega Debris Disk: A Surprise from Spitzer

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

Infrared observations and thermal models of the Beta Pictoris disk

Measurements of the flux from the central portion of the Beta Pic disk performed via photometry at 3.5-20 microns in 4- and 8-arcsec apertures are presented. The 10.1- and 20-micron measurements show

The First Spatially Resolved Mid-Infrared Spectroscopy of β Pictoris

Long-slit spectra probe the southwest side of the disk in the 8-13 μm region. Dust within 0.″8 of the star shows silicate emission features, including amorphous and crystalline species. Farther out,

Spitzer IRS Spectroscopy of IRAS-discovered Debris Disks

We have obtained Spitzer Space Telescope Infrared Spectrograph (IRS) 5.5-35 μm spectra of 59 main-sequence stars that possess IRAS 60 μm excess. The spectra of five objects possess spectral features

Decay of Planetary Debris Disks

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

How Observations of Circumstellar Disk Asymmetries Can Reveal Hidden Planets: Pericenter Glow and Its Application to the HR 4796 Disk

Recent images of the disks of dust around the young stars HR 4796A and Fomalhaut show, in each case, a double-lobed feature that may be asymmetric (one lobe may be brighter than the other). A

Infrared Photometry of β Pictoris Type Systems

We obtained small-aperture (4″–5″ diameter) infrared (2–20 μm) photometry of 10 early-type main-sequence stars with infrared excesses from circumstellar dust. These systems possibly exemplify the β