Astrophysics (Index)About

spectral band

(band)
(set of related, closely-packed spectral lines)

The term spectral band can be used in a general way to indicate a contiguous set (interval) of spectral wavelengths. It is often shortened to the term band. A common use is to describe the wavelength-range of filters or receivers.


Spectral band is also used assuming a more specific meaning: such an interval of wavelengths that are affected by a molecule, often a large, complex molecule, that produces many spectral lines, often forming a closely-packed pattern, even to the point of overlapping. If they overlap or if the spectroscope's resolution is low, it is seen as a range of absorption (absorption band) or emission (emission band). Polycyclic aromatic hydrocarbons (PAHs) produce these, e.g., PAH emissions. Water lines are another example.


(spectrography)
Further reading:
https://en.wikipedia.org/wiki/Spectral_bands
https://dictionary.obspm.fr/index.php?showAll=1&formSearchTextfield=absorption+band
https://dictionary.obspm.fr/index.php?showAll=1&formSearchTextfield=emission+band
https://www.microimages.com/documentation/miglossary/terms/spectralbandorspectralregion.htm
https://glossary.ametsoc.org/wiki/Spectral_interval

Referenced by pages:
Arcminute Microkelvin Imager (AMI)
atmospheric window
black-body radiation
Breakthrough Listen (BL)
C-BASS
chemically peculiar star (CP star)
Cherenkov detector
color-magnitude diagram (CMD)
Compton reflection
continuous absorption
continuous spectrum
continuum
Cosmic Evolution Survey (COSMOS)
diffuse interstellar bands (DIBs)
electromagnetic spectrum
filter
fluorescence
Green Bank Telescope (GBT)
Gunn-Peterson trough
high-energy astrophysics (HEA)
Hubble Deep Field (HDF)
imaging Fourier transform spectroscopy (IFTS)
interstellar medium (ISM)
ITU
jansky (Jy)
K correction
Lick indices
light curve
line blanketing
Lyman-Werner photon
methylidyne (CH)
microcalorimeter
microwave
mid infrared (MIR)
near infrared (NIR)
noise-equivalent power (NEP)
observational astronomy
optical interferometer
photocathode
photon counting
photosphere
precipitable water vapor (PWV)
R band
radio frequency interference (RFI)
radio source (RS)
S-type star (S)
Simons Array
SMART-1
SOFIA
speckles
spectral feature
spectral signature
SPHERE
Spitzer Extended Deep Survey (SEDS)
subradio
telescope
telescope type
transient astronomy
tremendously low frequency (TLF)
water lines
wavefront error (WFE)
waveplate

Index