Feeling blue

Esahubble_potw1845a_1024

esahubble_potw1845a November 5th, 2018

Credit: ESA/Hubble & NASA

This captivating image from the NASA/ESA Hubble Space Telescopes Wide Field Camera 3 shows a lonely dwarf galaxy, a staggering 100 million light-years away from Earth. This image depicts the blue compact dwarf galaxy ESO 338-4, which can be found in the constellation of Corona Australis (the Southern Crown). Blue compact dwarf galaxies take their name from the intensely blue star-forming regions that are often found within their cores. One such region can be seen embedded in ESO 338-4, which is populated with bright young stars voraciously consuming hydrogen. These massive stars are doomed to a short existence, as despite their vast supplies of hydrogen fuel. The nuclear reactions in the cores of these stars will burn through these supplies in only millions of years a mere blink of an eye in astronomical terms. The young blue stars nestled within a cloud of dust and gas in the centre of this image are the result of a recent galaxy merger between a wandering galaxy and ESO 388-4. This galactic interaction disrupted the clouds of gas and dust surrounding ESO 338-4 and led to the rapid formation of a new population of stars.

Image Source: https://www.spacetelescope.org/images/potw1845a/

Curator: ESA/Hubble, Garching bei München, None, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
ESO 338-4
Subject - Local Universe
Galaxy > Size > Dwarf
Esahubble_potw1845a_128
 

Position Details

Position (ICRS)
RA = 19h 27m 58.7s
DEC = -41° 34’ 29.5”
Orientation
North is 8.7° CCW
Field of View
1.9 x 2.0 arcminutes
Constellation
Sagittarius

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_blue Hubble Space Telescope (ACS) Optical (V) 550.0 nm
Arrow_left_cyan Hubble Space Telescope (ACS) Ultraviolet (very broad (BaF2)) 152.0 nm
Arrow_left_blue Hubble Space Telescope (STIS ) Optical (O III) 500.7 nm
Arrow_left_purple Hubble Space Telescope (ACS) Ultraviolet (UV (Ly-)) 127.0 nm
Arrow_left_green Hubble Space Telescope (STIS ) Optical (O III) 500.7 nm
Arrow_left_red Hubble Space Telescope (WFC3) Infrared (J) 1.1 µm
Spectrum_base
Arrow_top_blue
Arrow_top_cyan
Arrow_top_blue
Arrow_top_purple
Arrow_top_green
Arrow_top_red
Esahubble_potw1845a_1280
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ID
potw1845a
Subject Category
C.5.2.2  
Subject Name
ESO 338-4
Credits
ESA/Hubble & NASA
Release Date
2018-11-05T06:00:00
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1845a/
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
Instrument
ACS, ACS, STIS , ACS, STIS , WFC3
Color Assignment
Blue, Cyan, Blue, Purple, Green, Red
Band
Optical, Ultraviolet, Optical, Ultraviolet, Optical, Infrared
Bandpass
V, very broad (BaF2), O III, UV (Ly-), O III, J
Central Wavelength
550, 152, 500.7, 127, 500.7, 1100
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
291.994738345, -41.5748636072
Reference Dimension
2273.0, 2449.0
Reference Pixel
1136.5, 1224.5
Scale
-1.38890475904e-05, 1.38890475904e-05
Rotation
8.6599999999999966
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
None
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw1845a
Metadata Date
2018-11-05T10:33:22.536109
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.