Excitation in the middle of M33

Noirlab_noao0149a_1024

noirlab_noao0149a June 30th, 2020

Credit: P.Massey (Lowell), N.King (STScI), S.Holmes (Charleston), G.Jacoby (WIYN)/AURA/NSF

This image of the central region of the Triangulum Galaxy, M33, was taken in October 2000 with the Mayall 4-meter telescope at Kitt Peak National Observatory, using the Mosaic imager. It shows data from three of the eight color filters being used by the Local Group Galaxies Survey Team to study this nearby spiral galaxy, the third largest in our Local Group, behind the Milky Way and the Andromeda Galaxy. The colors illustrate the excitation levels and abundance patterns in the galaxy's HII regions. The color blue shows [OIII] (doubly ionized oxygen), green shows visible light, and red denotes H alpha (ionized hydrogen). The observations were taken by Nichole King (Space Telescope Science Institute, Baltimore, MD) and Phil Massey (the Principal Investigator for the survey team, Lowell Observatory, Flagstaff, AZ); Shadrian Holmes (College of Charleston, SC) reduced the data; and George Jacoby (WIYN Observatory, Tucson, AZ) generated the combined color product. The survey will eventually cover all of M33. For more details, see http://www.lowell.edu/users/massey/lgsurvey.html.

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/noao0149a/

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
Noirlab_noao0149a_128
 

Position Details

Position (ICRS)
RA = 1h 33m 48.0s
DEC = 30° 39’ 12.2”
Orientation
North is 90.0° CCW
Field of View
20.7 x 24.7 arcminutes
Constellation
Triangulum

Color Mapping

  Telescope Spectral Band Wavelength
Red Nicholas U. Mayall 4-meter Telescope (Mosaic 1) Optical (Ha) 657.0 nm
Green Nicholas U. Mayall 4-meter Telescope (Mosaic 1) Optical (G) 475.0 nm
Blue Nicholas U. Mayall 4-meter Telescope (Mosaic 1) Optical (Olll) 499.0 nm
Spectrum_base
Red
Green
Blue
Noirlab_noao0149a_1280
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ID
noao0149a
Subject Category
Subject Name
M33
Credits
P.Massey (Lowell), N.King (STScI), S.Holmes (Charleston), G.Jacoby (WIYN)/AURA/NSF
Release Date
2020-06-30T21:33:49
Lightyears
Redshift
Reference Url
https://noirlab.edu/public/images/noao0149a/
Type
Observation
Image Quality
Distance Notes
Facility
Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope, Nicholas U. Mayall 4-meter Telescope
Instrument
Mosaic 1, Mosaic 1, Mosaic 1
Color Assignment
Red, Green, Blue
Band
Optical, Optical, Optical
Bandpass
Ha, G, Olll
Central Wavelength
657, 475, 499
Start Time
Integration Time
Dataset ID
None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
23.4501693481, 30.6533776508
Reference Dimension
4797.0, 5706.0
Reference Pixel
2398.5, 2853.0
Scale
-7.20343363759e-05, 7.20343363759e-05
Rotation
89.9800000000001
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
noao0149a
Metadata Date
2021-04-11T16:02:25.534960
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.