M33 optical/radio

Noirlab_noao-m33_oar_1024

noirlab_noao-m33_oar November 25th, 2002

Credit: T.A.Rector (NRAO/AUI/NSF and NOIRLab/NSF/AURA) and M.Hanna (NOIRLab/NSF/AURA)

This image of the Triangulum Galaxy was created by combining optical data from the National Science Foundation's 0.9-meter telescope on Kitt Peak in Arizona with radio data from the National Science Foundation's Very Large Array (VLA) telescope in New Mexico and the Westerbork Synthesis Radio Telescope (WSRT) in the Netherlands. Also known as M33, the Triangulum Galaxy is part of the Local Group of galaxies, which includes the Andromeda Galaxy (M31) and our galaxy, the Milky Way. M33 is over thirty thousand light-years across, and more than two million light-years away. The optical data in this image show the many stars within the galaxy as well as reddish star-forming regions that are filled with hot hydrogen gas. The radio data reveal the cool hydrogen gas within the galaxy, gas which cannot be seen with an optical telescope. Combined together, the radio and optical give a more comprehensive view of star formation in this galaxy. The color image was generated by combining images taken with the 0.9-meter telescope through four filters (B, V, I and Hydrogen-alpha) and 21cm neutral hydrogen data taken with the VLA and WSRT (shown in blue-violet). The image is one square degree in field of view, roughly five times the size of the Moon. We also have an image of M33 without the radio data.

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/noao-m33_oar/

Curator: NSF's NOIRLab, Tucson, AZ, USA

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
M33 NGC 598
Noirlab_noao-m33_oar_128
 

Position Details

Position (ICRS)
RA = 1h 35m 48.9s
DEC = 30° 42’ 55.6”
Orientation
North is 179.4° CCW
Field of View
57.4 x 58.6 arcminutes
Constellation
Triangulum

Color Mapping

  Telescope Spectral Band Wavelength
Purple WIYN 0.9-meter Telescope (Mosaic 1) Radio (Hi) 210.0 mm
Red WIYN 0.9-meter Telescope (Mosaic 1) Optical (Ha) 657.0 nm
Orange WIYN 0.9-meter Telescope (Mosaic 1) Optical (I) 820.0 nm
Green WIYN 0.9-meter Telescope (Mosaic 1) Optical (V) 538.0 nm
Blue WIYN 0.9-meter Telescope (Mosaic 1) Optical (B) 438.0 nm
Spectrum_ir2
Purple
Red
Orange
Green
Blue
Noirlab_noao-m33_oar_1280
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ID
noao-m33_oar
Subject Category
Subject Name
M33, NGC 598
Credits
T.A.Rector (NRAO/AUI/NSF and NOIRLab/NSF/AURA) and M.Hanna (NOIRLab/NSF/AURA)
Release Date
2002-11-25T11:44:41
Lightyears
Redshift
Reference Url
https://noirlab.edu/public/images/noao-m33_oar/
Type
Observation
Image Quality
Distance Notes
Facility
WIYN 0.9-meter Telescope, WIYN 0.9-meter Telescope, WIYN 0.9-meter Telescope, WIYN 0.9-meter Telescope, WIYN 0.9-meter Telescope
Instrument
Mosaic 1, Mosaic 1, Mosaic 1, Mosaic 1, Mosaic 1
Color Assignment
Purple, Red, Orange, Green, Blue
Band
Radio, Optical, Optical, Optical, Optical
Bandpass
Hi, Ha, I, V, B
Central Wavelength
210000000, 657, 820, 538, 438
Start Time
Integration Time
Dataset ID
None, None, None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
23.95379718, 30.71544635
Reference Dimension
8107.0, 8270.0
Reference Pixel
518.0670643, 3724.444275
Scale
-0.000118, 0.000118
Rotation
179.3653773
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
NSF's NOIRLab
URL
https://noirlab.edu
Name
Email
Telephone
Address
950 North Cherry Ave.
City
Tucson
State/Province
AZ
Postal Code
85719
Country
USA
Rights
Creative Commons Attribution 4.0 International License
Publisher
NSF's NOIRLab
Publisher ID
noirlab
Resource ID
noao-m33_oar
Metadata Date
2021-04-14T05:16:35.800957
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.