Inflating Sh2-308

Esahubble_potw1721a_500

esahubble_potw1721a May 22nd, 2017

Credit: ESA/Hubble & NASA

The NASA/ESA Hubble Space Telescope still has a few tricks up its sleeve in its task of exploring the Universe. For one, it is able to image two adjacent parts of the sky simultaneously. It does this using two different cameras one camera can be trained on the target object itself, and the other on a nearby patch of sky so that new and potentially interesting regions of the cosmos can be observed at the same time (these latter observations are known as parallel fields). This image shows part of a bubble-like cloud of gas a nebula named Sh2-308 surrounding a massive and violent star named EZ Canis Majoris. It uses observations from Hubbles Advanced Camera for Surveys, and is the parallel field associated with another view of the nebula produced by Hubbles Wide Field Camera 3. EZ Canis Majoris is something known as a Wolf-Rayet star, and is one of the brightest known stars of its kind. Its outer shell of hydrogen gas has been used up, revealing inner layers of heavier elements that burn at ferocious temperatures. The intense radiation pouring out from EZ Canis Majoris forms thick stellar winds that whip up nearby material, sculpting and blowing it outwards. These processes have moulded the surrounding gas into a vast bubble. A bubble nebula produced by a Wolf-Rayet star is made of ionised hydrogen (HII), which is often found in interstellar space. In this case, it is the outer hydrogen layers of EZ Canis Majoris the bubble that are being inflated by the deluge of radiation the air coming from the central star. The fringes of these bubbles are nebulous and wispy, as can be seen in this image.

Image Source: https://www.spacetelescope.org/images/potw1721a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
Sh2-308
Subject - Milky Way
Nebula
Esahubble_potw1721a_128
 

Position Details

Position (ICRS)
RA = 6h 53m 15.2s
DEC = -23° 57’ 11.0”
Orientation
North is 40.0° CCW
Field of View
3.4 x 3.4 arcminutes
Constellation
Canis Major

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_red Hubble Space Telescope (ACS) Optical (NII) 658.0 nm
Arrow_left_green Hubble Space Telescope (ACS) Optical (NII) 658.0 nm
Arrow_left_green Hubble Space Telescope (ACS) Optical (OIII) 502.0 nm
Arrow_left_blue Hubble Space Telescope (ACS) Optical (OIII) 502.0 nm
Spectrum_base
Arrow_top_red
Arrow_top_green
Arrow_top_green
Arrow_top_blue
Esahubble_potw1721a_1280
×
ID
potw1721a
Subject Category
B.4  
Subject Name
Sh2-308
Credits
ESA/Hubble & NASA
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1721a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
ACS, ACS, ACS, ACS
Color Assignment
Red, Green, Green, Blue
Band
Optical, Optical, Optical, Optical
Bandpass
NII, NII, OIII, OIII
Central Wavelength
658, 658, 502, 502
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
103.313274315, -23.9530462067
Reference Dimension
4072.0, 4089.0
Reference Pixel
2036.0, 2044.5
Scale
-1.3890625788e-05, 1.3890625788e-05
Rotation
39.980000000000032
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
potw1721a
Metadata Date
2016-10-26T16:51:48+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.