Caught in a Dust Trap

Eso_potw1742a_1024

eso_potw1742a October 16th, 2017

Credit: ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)

This image from the Atacama Large Millimeter/submillimeter Array (ALMA) shows V1247 Orionis, a young, hot star surrounded by a dynamic ring of gas and dust, known as a circumstellar disc. This disc can be seen here in two parts: a clearly defined central ring of matter and a more delicate crescent structure located further out. The region between the ring and crescent, visible as a dark strip, is thought to be caused by a young planet carving its way through the disc. As the planet orbits around its parent star, its motion creates areas of high pressure on either side of its path, similar to how a ship creates bow waves as it cuts through water. These areas of high pressure could become protective barriers around sites of planet formation; dust particles are trapped within them for millions of years, allowing them the time and space to clump together and grow. The exquisite resolution of ALMA allows astronomers to study the intricate structure of such a dust trapping vortex for the first time. The image reveals not only the crescent-shaped dust trap at the outer edge of the dark strip, but also regions of excess dust within the ring, possibly indicating a second dust trap that formed inside of the potential planets orbit. This confirms the predictions of earlier computer simulations. Dust trapping is one potential solution to a major stumbling block in current theories of how planets form, which predicts that particles should drift into the central star and be destroyed before they have time to grow to planetesimal sizes (the radial drift problem). Links Science paper

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/potw1742a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

View Options

Image Details

Image Type
Observation
Object Name
V1247 Orionis
Subject - Milky Way
Star > Circumstellar Material > Disk > Protoplanetary
Eso_potw1742a_128
 

Position Details

Position (ICRS)
RA = 5h 38m 5.3s
DEC = -1° 15’ 21.7”
Orientation
North is up
Field of View
0.0 x 0.0 arcminutes
Constellation
Orion

Color Mapping

  Telescope Spectral Band Wavelength
Orange ALMA (Band 7) Millimeter (H) 870.0 µm
Spectrum_ir1
Orange
Eso_potw1742a_1280
×
ID
potw1742a
Subject Category
B.3.7.2.1  
Subject Name
V1247 Orionis
Credits
ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)
Release Date
2017-10-16T06:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/potw1742a/
Type
Observation
Image Quality
Distance Notes
Facility
Atacama Large Millimeter/submillimeter Array
Instrument
Band 7
Color Assignment
Orange
Band
Millimeter
Bandpass
H
Central Wavelength
870000
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
84.5218804978, -1.25602763688
Reference Dimension
3000.0, 2000.0
Reference Pixel
1000.0, 1000.0
Scale
-2.2949182726804311E-07, 2.2949182726804311E-07
Rotation
-0
Coordinate System Projection:
TAN
Quality
Position
FITS Header
Notes
Creator (Curator)
European Southern Observatory
URL
http://www.eso.org
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
European Southern Observatory
Publisher ID
eso
Resource ID
potw1742a
Metadata Date
2017-10-23T22:42:35.476483
Metadata Version
1.1
×

 

Detailed color mapping information coming soon...

×

There is no distance meta data in this image.