The surface of the red giant star π1 Gruis from PIONIER on the VLT

Eso_eso1741a_1024

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

Image Details

Image Type
Observation
Object Name
HD 212087 π1 Gruis
Subject - Milky Way
Star > Evolutionary Stage > Red Giant
Eso_eso1741a_128
 

Position Details

Position (ICRS)
RA = 22h 22m 44.2s
DEC = -45° 56’ 52.6”
Orientation
North is up
Field of View
0.0 x 0.0 arcminutes
Constellation
Grus

Color Mapping

  Telescope Spectral Band Wavelength
Red VLTI (PIONIER) Infrared (H) 1.6 µm
Red VLTI (PIONIER) Infrared (H) 1.7 µm
Red VLTI (PIONIER) Infrared (H) 1.7 µm
Green VLTI (PIONIER) Infrared (H) 1.7 µm
Blue VLTI (PIONIER) Infrared (H) 1.6 µm
Spectrum_base
Red
Red
Red
Green
Blue
Eso_eso1741a_1280
×
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
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
eso1741a
Metadata Date
2017-12-15T15:14:32+01:00
Metadata Version
1.1
×

 

Detailed color mapping information coming soon...

×

There is no distance meta data in this image.

 

Providers | Sign In