A galaxy at the edge of the Universe

Eso_eso9526a_1024

eso_eso9526a September 15th, 1995

Credit: ESO

These two photos show the extremely distant galaxy with redshift z = 4.4, detected near QSO 1202-07. (a) The left image was obtained with the SUSI CCD camera at the ESO 3.5-metre NTT telescope. It is the sum of 6 single exposures in red colour of the QSO 1202-07 field with a total integration time of 60 minutes. Most of the objects seen are galaxies; the faintest ones have approx. red magnitude R = 26.5. The brightest star-like image at the center of the field is of the 18th magnitude QSO. The galaxy in the line of sight at redshift z=4.4 is barely visible, 2 arcsec NW of the QSO. This corresponds to ~ 12 kpc at the cosmological distance. The red magnitude is R = 24.3. Full Width Half Intensity of the stellar images in the combined frame is 0.52 arcsec. North is at the top and East to the left. The field size is 45x45 arcsec. (b) The right photo is of the same field as (a), but now including 12 single exposures with total integration time of 120 min and therefore showing even fainter objects. The QSO, as well as a nearby star (upper right quadrant) which was used to determine the point spread function (the shape of the image of a supposedly point-like object), have been subtracted by image processing. This allows a clearer view of the high-redshift galaxy which now shows some evidence of structure, suggestive of spiral or irregular morphology.

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/eso9526a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

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Image Details Image Details

Image Type
Observation
Object Name
QSO 1202-07
Subject - Distant Universe
Galaxy
Galaxy > Activity > AGN > Quasar

Color Mapping Details Color Mapping

  Telescope Spectral Band Wavelength
Pseudocolor NTT (SUSI) Optical (R) -
Pseudocolor NTT (SUSI) Optical (R) -
Eso_eso9526a_1280
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ID
eso9526a
Subject Category
D.5   D.5.3.2.1  
Subject Name
QSO 1202-07
Credits
ESO
Release Date
1995-09-15T00:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso9526a/
Type
Observation
Image Quality
Distance Notes
Facility
New Technology Telescope, New Technology Telescope
Instrument
SUSI, SUSI
Color Assignment
Pseudocolor, Pseudocolor
Band
Optical, Optical
Bandpass
R, R
Central Wavelength
Start Time
Integration Time
7200, 3600
Dataset ID
Notes
Coordinate Frame
Equinox
Reference Value
Reference Dimension
6466.0, 3802.0
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
eso9526a
Metadata Date
2010-01-20T11:36:35+01:00
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.

 

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