Surveying the cosmos

Esahubble_potw1725a_500

esahubble_potw1725a June 19th, 2017

Credit: ESA/Hubble & NASA

The object in the middle of this image, sitting alone within a star-studded cosmos, is a galaxy known as ESO 486-21. ESO 486-21 is a spiral galaxy albeit with a somewhat irregular and ill-defined structure located some 30 million light-years from Earth. The NASA/ESA Hubble Space Telescope observed this object while performing a survey the Legacy ExtraGalactic UV Survey (LEGUS) of 50 nearby star-forming galaxies. The LEGUS sample was selected to cover a diverse range of galactic morphologies, star formation rates, galaxy masses, and more. Astronomers use such data to understand how stars form and evolve within clusters, and how these processes affect both their home galaxy and the wider Universe. ESO 486-21 is an ideal candidate for inclusion in such a survey as it is known to be in the process of forming new stars, which are created when large clouds of gas and dust (seen here in pink) within the galaxy crumple inwards upon themselves. LEGUS made use of Hubbles Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS). The WFC3 obtained detailed observations of the target objects while the ACS obtained what are known as parallel fields instead of leaving ACS idle, it was instead trained on a small patch of sky just offset from the target field itself, allowing it to gather additional valuable information while the primary target was being observed by WFC3. Parallel fields played an important role in Hubbles Frontier Fields programme, which used the magnifying power of large galaxy clusters (via a phenomenon known as gravitational lensing) to explore objects in the distant Universe.

Image Source: https://www.spacetelescope.org/images/potw1725a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
ESO 486-21
Subject - Local Universe
Galaxy » Type » Spiral
Esahubble_potw1725a_128
 

Position Details

Position (ICRS)
RA = 5h 3m 19.7s
DEC = -25° 25’ 23.6”
Orientation
North is 48.5° CCW
Field of View
2.5 x 1.4 arcminutes
Constellation
Lepus

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_red Hubble Space Telescope (WFC3) Optical (H Alpha + N III) 657.0 nm
Arrow_left_green Hubble Space Telescope (WFC3) Optical (V) 555.0 nm
Arrow_left_green Hubble Space Telescope (WFC3) Optical (y) 547.0 nm
Arrow_left_blue Hubble Space Telescope (WFC3) Optical (B) 438.0 nm
Arrow_left_purple Hubble Space Telescope (WFC3) Optical (U) 336.0 nm
Arrow_left_purple Hubble Space Telescope (WFC3) Ultraviolet (UV) 275.0 nm
Arrow_left_red Hubble Space Telescope (WFC3) Optical (I) 814.0 nm
Spectrum_base
Arrow_top_red
Arrow_top_green
Arrow_top_green
Arrow_top_blue
Arrow_top_purple
Arrow_top_purple
Arrow_top_red
Esahubble_potw1725a_1280
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ID
potw1725a
Subject Category
C.5.1.1  
Subject Name
ESO 486-21
Credits
ESA/Hubble & NASA
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1725a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFC3, WFC3, WFC3, WFC3, WFC3, WFC3, WFC3
Color Assignment
Red, Green, Green, Blue, Purple, Purple, Red
Band
Optical, Optical, Optical, Optical, Optical, Ultraviolet, Optical
Bandpass
H Alpha + N III, V, y, B, U, UV, I
Central Wavelength
657, 555, 547, 438, 336, 275, 814
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
75.8320864136, -25.4232316351
Reference Dimension
3826.0, 2044.0
Reference Pixel
1913.0, 1022.0
Scale
-1.10185134697e-05, 1.10185134697e-05
Rotation
48.47999999999999
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
ESA/Hubble
URL
http://www.spacetelescope.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
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw1725a
Metadata Date
2016-12-09T19:22:20+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.