Starbursts in NGC 5398

Esahubble_potw1737a_500

esahubble_potw1737a September 11th, 2017

Credit: ESA/Hubble & NASA

This NASA/ESA Hubble Space Telescope picture shows NGC 5398, a barred spiral galaxy located about 55 million light-years away. The galaxy is famous for containing an especially extensive HII region, a large cloud composed of ionised hydrogen (or HII, pronounced H-two, with H being the chemical symbol for hydrogen and the II indicating that the atoms have lost an electron to become ionised). NGC 5398s cloud is named Tol 89 and sits at the lower left end of the galaxys central bar of stars, a structure that cuts through the galactic core and funnels material inwards to maintain the star formation occurring there. Tol 89 is conspicuous in being the only large massive star forming complex in the entire galaxy, with an extension of roughly 5000 times 4000 light-years; it contains at least seven young and massive star clusters. The two brightest clumps within Tol 89, which astronomers have named simply A and B, appear to have undergone two bursts of star-forming activity starbursts roughly 4 million and less than 3 million years ago respectively. Tol 89-A is thought to contain a number of particularly bright and massive stars known as Wolf-Rayet stars, which are known for their high temperatures and extreme stellar winds.

Image Source: https://www.spacetelescope.org/images/potw1737a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 5398
Subject - Local Universe
Galaxy » Type » Barred
Esahubble_potw1737a_128
 

Position Details

Position (ICRS)
RA = 14h 1m 22.1s
DEC = -33° 3’ 49.3”
Orientation
North is 99.1° CW
Field of View
3.4 x 1.7 arcminutes
Constellation
Centaurus

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_blue Hubble Space Telescope (ACS) Optical (V) 606.0 nm
Arrow_left_green Hubble Space Telescope (ACS) Optical (V) 606.0 nm
Arrow_left_green Hubble Space Telescope (ACS) Optical (I) 814.0 nm
Arrow_left_red Hubble Space Telescope (ACS) Optical (V) 606.0 nm
Arrow_left_red Hubble Space Telescope (ACS) Optical (I) 814.0 nm
Spectrum_base
Arrow_top_blue
Arrow_top_green
Arrow_top_green
Arrow_top_red
Arrow_top_red
Esahubble_potw1737a_1280
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ID
potw1737a
Subject Category
C.5.1.2  
Subject Name
NGC 5398
Credits
ESA/Hubble & NASA
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1737a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
ACS, ACS, ACS, ACS, ACS
Color Assignment
Blue, Green, Green, Red, Red
Band
Optical, Optical, Optical, Optical, Optical
Bandpass
V, V, I, V, I
Central Wavelength
606, 606, 814, 606, 814
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
210.341898772, -33.0637077139
Reference Dimension
4054.0, 2024.0
Reference Pixel
2027.0, 1012.0
Scale
-1.38790501075e-05, 1.38790501075e-05
Rotation
-99.060000000000059
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
potw1737a
Metadata Date
2016-12-03T11:57:22+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.