A stubborn dwarf galaxy

Esahubble_potw1627a_1024

esahubble_potw1627a July 4th, 2016

Credit: ESA/Hubble & NASA

The fuzzy collection of stars seen in this NASA/ESA Hubble Space Telescope image forms an intriguing dwarf galaxy named LEDA 677373, located about 14 million light-years away from us. Dwarf galaxies are small, faint collections of stars and gas. Their diverse properties make them intriguing objects to astronomers, but their small size means that we can only explore those that lie closest to us, within the Local Group, such as LEDA 677373. This particular dwarf galaxy contains a plentiful reservoir of gas from which it could form stars. However, it stubbornly refuses to do so. In a bid to find out why, Hubble imaged the galaxys individual stars at different wavelengths, a method that allows astronomers to figure out a stars age. These observations showed that the galaxy has been around for at least six billion years plenty of time to form stars. So why has it not done so? Rather than being stubborn, LEDA 677373 seems to have been the unfortunate victim of a cosmic crime. A nearby giant spiral galaxy, Messier 83, seems to be stealing gas from the dwarf galaxy, stopping new stars from being born.

Provider: Hubble Space Telescope | ESA

Image Source: http://www.spacetelescope.org/images/potw1627a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details Image Details

Image Type
Observation
Object Name
LEDA 677373
Subject - Local Universe
Galaxy > Size > Dwarf
Esahubble_potw1627a_128
 

Position Details Position Details

Position (ICRS)
RA = 13h 37m 1.9s
DEC = -33° 21’ 34.4”
Orientation
North is 39.2° CCW
Field of View
1.9 x 1.3 arcminutes
Constellation
Centaurus

Color Mapping Details Color Mapping

  Telescope Spectral Band Wavelength
Red Hubble (WFPC2) Optical (I) 814.0 nm
Green Hubble (WFPC2) Optical (I) 814.0 nm
Green Hubble (WFPC2) Optical (V) 555.0 nm
Blue Hubble (WFPC2) Optical (V) 555.0 nm
Spectrum_base
Red
Green
Green
Blue
Esahubble_potw1627a_1280
×
ID
potw1627a
Subject Category
C.5.2.2  
Subject Name
LEDA 677373
Credits
ESA/Hubble & NASA
Release Date
2016-07-04T06:00:00
Lightyears
Redshift
Reference Url
http://www.spacetelescope.org/images/potw1627a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFPC2, WFPC2, WFPC2, WFPC2
Color Assignment
Red, Green, Green, Blue
Band
Optical, Optical, Optical, Optical
Bandpass
I, I, V, V
Central Wavelength
814, 814, 555, 555
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
204.257920854, -33.3595651118
Reference Dimension
1114.0, 790.0
Reference Pixel
557.0, 395.0
Scale
-2.77575190079e-05, 2.77575190079e-05
Rotation
39.179999999999971
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
potw1627a
Metadata Date
2016-05-03T11:44:29+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.

 

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