Spring Cleaning in an Infant Star System

Eso_potw1714a_500

eso_potw1714a April 3rd, 2017

Credit: ALMA (ESO/NAOJ/NRAO)/ Fedele et al.

This image depicts the dusty disc encircling the young, isolated star HD 169142. The Atacama Large Millimeter/submillimeter Array (ALMA) imaged this disc in high resolution by picking up faint signals from its constituent millimetre-sized dust grains. The vivid rings are thick bands of dust, separated by deep gaps. Optimised to study the cold gas and dust of systems like HD 169142, ALMAs sharp eyes have revealed the structure of many infant solar systems with similar cavities and gaps. A variety of theories have been proposed to explain them such as turbulence caused by magnetorotational instability, or the fusing of dust grains but the most plausible explanation is that these pronounced gaps were carved out by giant protoplanets. When solar systems form gas and dust coalesce into planets. These planets then effectively spring clean their orbits, clearing them of gas and dust and herding the remaining material into well-defined bands. The deep gaps seen in this image are consistent with the presence of multiple protoplanets a finding that agrees with other optical and infrared studies of the same system. Observing such dusty protoplanetary discs with ALMA allows scientists to investigate the first steps of planet formation in a bid to unveil the evolutionary paths of these infant systems. Links INAF press release (Italian)

Image Source: https://www.eso.org/public/images/potw1714a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
HD 169142
Subject - Milky Way
Star » Circumstellar Material » Disk » Protoplanetary
Eso_potw1714a_128
 

Position Details

Position (ICRS)
RA = 18h 24m 29.8s
DEC = -29° 46’ 49.9”
Orientation
North is up
Field of View
0.0 x 0.0 arcminutes
Constellation
Sagittarius

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_orange Atacama Large Millimeter/submillimeter Array (Band 6) Millimeter (230 GHz) 1.3 mm
Spectrum_ir1
Arrow_top_orange
Eso_potw1714a_1280
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ID
potw1714a
Subject Category
B.3.7.2.1  
Subject Name
HD 169142
Credits
ALMA (ESO/NAOJ/NRAO)/ Fedele et al.
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/potw1714a/
Type
Observation
Image Quality
Distance Notes
Facility
Atacama Large Millimeter/submillimeter Array
Instrument
Band 6
Color Assignment
Orange
Band
Millimeter
Bandpass
230 GHz
Central Wavelength
1300000
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
276.124069553, -29.7805272598
Reference Dimension
2000.0, 2000.0
Reference Pixel
1000.0, 1000.0
Scale
-7.15393543343e-08, 7.15393543343e-08
Rotation
-0
Coordinate System Projection:
TAN
Quality
Full
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
potw1714a
Metadata Date
2017-06-23T14:47:59.729819
Metadata Version
1.1
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Detailed color mapping information coming soon...

 

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There is no distance meta data in this image.