Astrophysics (index)about

near infrared

(NIR, near-IR)
(electromagnetic radiation in the range of 800-2500 nm)

Near infrared (NIR or near-IR) is infrared radiation adjacent to visible light within the electromagnetic radiation spectrum, with wavelength's 750-2500 nm, infrared's being 750 nm to 1 mm (somewhat different ranges are also stated, but are similar). The optical equipment for NIR is largely the same as that for visible light and modern research optical telescopes typically can observe at some or all NIR wavelengths as well. Sources producing visible light generally produce some NIR, and some sources are at distances such that redshift moves their visible light into the NIR band.

Among the uses for NIR astronomy is the study of cool stars. Also, of use is that NIR is less affected by dust than visible light: objects hidden in dusty nebulae might be observed in infrared.


(infrared,EMR,spectrum,band)
http://en.wikipedia.org/wiki/Near_infrared
http://en.wikipedia.org/wiki/Infrared_astronomy
http://www.icc.dur.ac.uk/~tt/Lectures/Galaxies/Images/Infrared/Regions/irregions.html
WaveLFreqPhoton
Energy
  
750nm400THz1.7eVbeginnear infrared
2500nm120THz496meVendnear infrared

Referenced by:
angstrom (Å)
Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS)
Canada-France-Hawaii Telescope (CFHT)
CorMASS
Discovery Channel Telescope (DCT)
DENIS
Dark Energy Survey (DES)
European Extremely Large Telescope (E-ELT)
European Southern Observatory Very Large Telescope (ESO VLT)
Euclid
first galaxies
Gaia
Gemini Observatory
Giant Magellan Telescope (GMT)
Gemini Planet Imager (GPI)
Gran Telescopio Canarias (GTC)
Hawaii K-band Galaxy Survey
High Definition Space Telescope (HDST)
helium 1083nm line
NEWS
Hubble Space Telescope (HST)
I band
infrared (IR)
JHK photometric system (JHK)
K band
Keck Observatory
KMOS
KMOS3D
Keck Planet Imager and Characterizer (KPIC)
Magellan Telescopes
Mimir
MMT
MMX
Multi-object Optical and Near-IR Spectrograph (MOONS)
New Technology Telescope (NTT)
optics
PanCET
passband
Palomar Testbed Interferometer (PTI)
reflector telescope
spectral energy distribution (SED)
SINS
SOFIA
SPECULOOS
SPHEREx
Subaru Telescope
University of Tokyo Atacama Observatory (TAO)
3D-HST
Telescopio Nazionale Galileo (TNG)
TripleSpec (TSpec)
Two Micron All-sky Survey (2MASS)
UltraVISTA
James Webb Space Telescope (JWST)
William Herschel Telescope (WHT)
atmospheric window
WINGS

index