The motion of a star around the central black hole in the Milky Way

Eso_eso0226c_500

eso_eso0226c October 16th, 2002

Credit: ESO

The left panel shows an infrared NACO image of a ~ 2 x 2 arcsec 2 area, centred on the position of the compact radio source "SgrA*" at the centre of the Milky Way Galaxy; it is marked by a small cross. The image was obtained in the K s -band at wavelength 2.1 m in May 2002 and the angular resolution (image sharpness) is about 0.060 arcsec. At about the same time, the star designated "S2" came within 0.015 arcsec of the radio source. At the distance of the Milky Way Center, 1 arcsec on the sky corresponds to 46 light-days; the bar is 20 light-days long (0.44 arcsec). The right panel displays the orbit of S2 as observed between 1992 and 2002, relative to SgrA* (marked with a circle). The positions of S2 at the different epochs are indicated by crosses with the dates (expressed in fractions of the year) shown at each point. The size of the crosses indicates the measurement errors. The solid curve is the best-fitting elliptical orbit - one of the foci is at the position of SgrA* . The 2002 data points come from NACO observations done during the early commissioning, fine adjustement, and Science Verification phases for this instrument

Image Source: https://www.eso.org/public/images/eso0226c/

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
S2 Sagittarius A*
Subject - Milky Way
Star
Galaxy » Component » Central Black Hole

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_pseudocolor Very Large Telescope (NACO) Infrared (K) 2.1 µm
Spectrum_base
Arrow_top_pseudocolor
Eso_eso0226c_1280
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ID
eso0226c
Subject Category
B.3   B.5.4.6  
Subject Name
S2, Sagittarius A*
Credits
ESO
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso0226c/
Type
Observation
Image Quality
Distance Notes
Distance in light years from the Max-Planck-Institute (http://www.mpe.mpg.de/SPIFFI/preprints/first_result_an1.pdf)
Facility
Very Large Telescope
Instrument
NACO
Color Assignment
Pseudocolor
Band
Infrared
Bandpass
K
Central Wavelength
2100
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
Equinox
Reference Value
Reference Dimension
971.0, 720.0
Reference Pixel
Scale
Rotation
Coordinate System Projection:
Quality
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
eso0226c
Metadata Date
2016-07-18T10:47:01+02:00
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.