The surface of the red giant star π1 Gruis from PIONIER on the VLT
eso_eso1741a December 20th, 2017
Credit: ESO
Astronomers using ESO’s Very Large Telescope have directly observed granulation patterns on the surface of a star outside the Solar System — the ageing red giant π1 Gruis. This remarkable new image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star. Each cell covers more than a quarter of the star’s diameter and measures about 120 million kilometres across.
Provider: European Southern Observatory
Image Source: https://www.eso.org/public/images/eso1741a/
Curator: European Southern Observatory, Garching bei München, Germany
Image Use Policy: Creative Commons Attribution 4.0 International License
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Image Details
Position Details
Color Mapping
- ID
- eso1741a
- Subject Category
- B.3.1.4
- Subject Name
- HD 212087, π1 Gruis
- Credits
- ESO
- Release Date
- 2017-12-20T19:00:00
- Lightyears
- Redshift
- Reference Url
- https://www.eso.org/public/images/eso1741a/
- Type
- Observation
- Image Quality
- Distance Notes
- Facility
- Very Large Telescope Interferometer, Very Large Telescope Interferometer, Very Large Telescope Interferometer, Very Large Telescope Interferometer, Very Large Telescope Interferometer
- Instrument
- PIONIER, PIONIER, PIONIER, PIONIER, PIONIER
- Color Assignment
- Red, Red, Red, Green, Blue
- Band
- Infrared, Infrared, Infrared, Infrared, Infrared
- Bandpass
- H, H, H, H, H
- Central Wavelength
- 1625, 1678, 1730, 1678, 1625
- Start Time
- Integration Time
- Dataset ID
- Notes
- Coordinate Frame
- ICRS
- Equinox
- J2000
- Reference Value
- 335.684190466, -45.947947647
- Reference Dimension
- 2000.0, 2000.0
- Reference Pixel
- 1000.0, 1000.0
- Scale
- -4.99513659071e-08, 4.99513659071e-08
- Rotation
- -0
- Coordinate System Projection:
- TAN
- Quality
- Full
- FITS Header
- Notes
- Creator (Curator)
- European Southern Observatory
- URL
- http://www.eso.org
- Name
- 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
- eso1741a
- Resource URL
- https://www.eso.org/public/archives/images/original/eso1741a.tif
- Related Resources
- Metadata Date
- 2017-12-15T15:14:32+01:00
- Metadata Version
- 1.1
Detailed color mapping information coming soon...
