Direct Detection of Extrasolar Comets Is Possible

  title={Direct Detection of Extrasolar Comets Is Possible},
  author={M. Jura},
  journal={The Astronomical Journal},
  pages={1261 - 1266}
  • M. Jura
  • Published 24 May 2005
  • Physics, Geology
  • The Astronomical Journal
The dust tails of comets similar to Hale-Bopp can scatter as much optical sunlight as does the Earth. Space-based observatories such as the Terrestrial Planet Finder or Darwin that will detect extrasolar terrestrial planets also will be able to detect extrasolar comets. 

Figures from this paper

Two well-studied white dwarfs with helium-dominated atmospheres (DBs) each possess less hydrogen than carried by a single average-mass comet. Plausibly, the wind rates from these stars are low enough
During the planet formation process, billions of comets are created and ejected into interstellar space. The detection and characterization of such interstellar comets (ICs) (also known as
Astrophysics in 2005
We bring you, as usual, the Sun and Moon and stars, plus some galaxies and a new section on astrobiology. Some highlights are short (the newly identified class of gamma‐ray bursts, and the Deep
On high-contrast characterization of nearby, short-period exoplanets with giant segmented-mirror telescopes
Measurements of the frequency with which short-period planets occur around main sequence stars allows a direct prediction of the number and types of such planets that will be amenable to
The PLATO 2.0 mission
PLATO 2.0 has recently been selected for ESA’s M3 launch opportunity (2022/24). Providing accurate key planet parameters (radius, mass, density and age) in statistical numbers, it addresses
The origin of life in comets
Abstract Mechanisms of interstellar panspermia have recently been identified whereby life, wherever it has originated, will disperse throughout the habitable zone of the Galaxy within a few billion


The Age Dependence of the Detectability of Comets Orbiting Solar-Type Stars
The outflows from comets in orbit around G-type main-sequence stars can be detected when they produce transient OH absorption lines in the spectrum near 3100 Å of the host star. There is only about a
Evolution and detectability of comet clouds during post-main-sequence stellar evolution
Stars leaving the main sequence enter a luminous phase, during which circumstellar comet disks would be partially evaporated. Such a process could explain some observations of water masers and
Gamma-ray burst constraints on the galactic frequency of extrasolar Oort Clouds
With the strong Compton Gamma-Ray Observatory/Burst and Transient Source Experiment (CGRO/BATSE) evidence that most gamma-ray bursts do not come from galactic neutron stars, models involving the
On the number of comets around other single stars
It is shown how to obtain interesting limits on the number of comets in orbit around other single stars in clouds similar to the one present in our own solar system. The number of comets around white
Dusty Circumstellar Disks
▪ Abstract Dusty circumstellar disks in orbit around main-sequence stars were discovered in 1983 by the infrared astronomical satellite. It was the first time material that was not another star had
Inner part observation of theβ pictoris disk
The inner regions of the circumstellar disk aroundβ Pictoris might be dust-free due to a possible planet which may have cleared up dust particles. We present a new observational technique based on
BETA PICTORIS: An Early Solar System?
Beta Pictoris ( Pic) is the best studied of the normal main-sequence stars surrounded by circumstellar dust disks. We review the status of Pic and its disk, and compare it with both the early and the
Discovery of water vapour around IRC+10216 as evidence for comets orbiting another star
The observation of circumstellar water vapour around the ageing carbon star IRC+10216 is reported; water is not expected in measurable quantities around such a star; the only plausible explanation for this water is that the recent evolution of IRC+ 10216 is causing the vaporization of a collection of orbiting icy bodies.
Dust production from collisions in extrasolar planetary systems. The inner beta Pictoris disc
Dust particles observed in extrasolar planetary discs originate from undetectable km-sized bodies but this valuable information remains uninteresting if the theoretical link between grains and
Water Vapor in Carbon-rich Asymptotic Giant Branch Stars from the Vaporization of Icy Orbiting Bodies
We argue that the presence of water vapor in the circumstellar outflow of a carbon-rich asymptotic giant branch (AGB) star is potentially a distinctive signature of extrasolar cometary systems.