Spiral Snapshot

Esahubble_potw2215a_1024

esahubble_potw2215a April 11th, 2022

Credit: ESA/Hubble & NASA, J. Lee and the PHANGS-HST Team

The spiral galaxy M91 fills the frame of this Wide Field Camera 3 observation from the NASA/ESA Hubble Space Telescope. M91 lies approximately 55 million light-years from Earth in the constellation Coma Berenices and — as is evident in this image — is a barred spiral galaxy. While M91’s prominent bar makes for a spectacular galactic portrait, it also hides an astronomical monstrosity. Like our own galaxy, M91 contains a supermassive black hole at its centre. A 2009 study using archival Hubble data found that this central black hole weighs somewhere between 9.6 and 38 million times as much as the Sun. Whilst archival Hubble data allowed astronomers to weigh M91’s central black hole, more recent observations have had other scientific aims. This observation is part of an effort to build a treasure trove of astronomical data exploring the connections between young stars and the clouds of cold gas in which they form. To do this, astronomers used Hubble to obtain ultraviolet and visible observations of galaxies already seen at radio wavelengths by the ground-based Atacama Large Millimeter/submillimeter Array (ALMA). Observing time with Hubble is a highly valued, and much sought-after, resource for astronomers. To obtain data from the telescope, astronomers first have to write a proposal detailing what they want to observe and highlighting the scientific importance of their observations. These proposals are then anonymised and judged on their scientific merit by a variety of astronomical experts. This process is incredibly competitive: following Hubble’s latest call for proposals, only around 13% of the proposals were awarded observing time.  Are you interested in finding out what Hubble is observing right now? You can follow the space telescope’s observations in real time at this link.

Provider: Hubble Space Telescope | ESA

Image Source: https://esahubble.org/images/potw2215a/

Curator: ESA/Hubble, Baltimore, MD, United States

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 4548
Esahubble_potw2215a_128
 

Position Details

Position (ICRS)
RA = 12h 35m 26.2s
DEC = 14° 29’ 58.6”
Orientation
North is 16.2° CCW
Field of View
2.7 x 2.6 arcminutes
Constellation
Coma Berenices

Color Mapping

  Telescope Spectral Band Wavelength
Red Hubble (WFC3) Optical (I) 814.0 nm
Green Hubble (WFC3) Optical (V) 555.0 nm
Blue Hubble (WFC3) Optical (B) 438.0 nm
Purple Hubble (WFC3) Optical (U) 336.0 nm
Purple Hubble (WFC3) Ultraviolet (UV) 275.0 nm
Spectrum_base
Red
Green
Blue
Purple
Purple
Esahubble_potw2215a_1280
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ID
potw2215a
Subject Category
Subject Name
NGC 4548
Credits
ESA/Hubble & NASA, J. Lee and the PHANGS-HST Team
Release Date
2022-04-11T06:00:00
Lightyears
Redshift
Reference Url
https://esahubble.org/images/potw2215a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFC3, WFC3, WFC3, WFC3, WFC3
Color Assignment
Red, Green, Blue, Purple, Purple
Band
Optical, Optical, Optical, Optical, Ultraviolet
Bandpass
I, V, B, U, UV
Central Wavelength
814, 555, 438, 336, 275
Start Time
Integration Time
Dataset ID
None, None, None, None, None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
188.85932586989446, 14.499612569779144
Reference Dimension
4086.0, 3948.0
Reference Pixel
2043.0, 1974.0
Scale
-1.1014092984861054e-05, 1.1014092984861054e-05
Rotation
16.20000000000001
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
ESA/Hubble
URL
https://esahubble.org
Name
Email
Telephone
Address
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr
City
Baltimore
State/Province
MD
Postal Code
21218
Country
United States
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw2215a
Metadata Date
2022-03-23T18:47:52+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.

 

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