ARP 220 (imagen Nircam y Miri)

ARP 220 (imagen Nircam y Miri)

brillando como una baliza brillante en medio de un mar de galaxias, ARP 220 ilumina el cielo nocturno desde esta vista desde el telescopio espacial James Webb de la NASA. En realidad, dos galaxias espirales en el proceso de fusión, ARP 220 brilla más brillante en luz infrarroja , lo que lo convierte en un objetivo ideal para webb. Es una galaxia infrarroja ultra luminosa (ULIRG) con una luminosidad de más de un billón de soles. En comparación, nuestra galaxia de la Vía Láctea tiene una luminosidad mucho más modesta de unos diez mil millones de soles.

ubicado a 250 millones de años luz en la constelación de serpens, la serpiente, ARP 220 es el objeto 220 en el Atlas de Galaxias Peculiares de Halton. Es el ulirg más cercano y el más brillante de las tres fusiones galácticas más cercanas a la Tierra.

La colisión de las dos galaxias espirales comenzó hace unos 700 millones de años. Preparó una enorme explosión de formación estrella . Alrededor de 200 grandes grupos de estrellas residen en una región llena y polvorienta de unos 5,000 años luz (aproximadamente el 5 por ciento del diámetro de la Vía Láctea). La cantidad de gas en esta pequeña región es igual a todo el gas en toda la galaxia de la Vía Láctea. 

Las observaciones anteriores del radiotelescopio revelaron alrededor de 100 restos de supernova en un área de menos de 500 años luz. El telescopio espacial Hubble de la NASA descubrió los núcleos de las galaxias parentales de 1,200 años de luz. Cada uno de los núcleos tiene un anillo giratorio formador de estrellas que explota la deslumbrante luz infrarroja tan evidente en esta vista de Webb. Esta luz deslumbrante crea Difraction Spikes - La característica estelar que domina esta imagen. 

En las afueras de esta fusión, Webb revela débiles colas de marea, o material extraído de las galaxias por gravedad, representada en azul, evidencia de la danza galáctica que está ocurriendo. Organic material represented in reddish-orange appears in streams and filaments across Arp 220.

Webb viewed Arp 220 with its Near-Infrared Cámara (nircam) y instrumento interfiro medio (miRi).

Credits

Imagen

NASA, ESA, CSA, STSCI

Procesamiento de imágenes

Alyssa Pagan (STSCI)

About The Object
Object Name Arp 220, IC 1127, VV 540, KPG 470, UGC 09913
Object Description Interacting Galaxies
R.A. Position 15:34:57.72
Dec. Position +23:30:05.92
Constellation Serpens
Distance 250 million light-years (100 million parsecs)
Dimensions Image is approximately 120,000 light years across.
About The Data
Data Description This image was created from JWST data from proposal: (K. Pontoppidan)
Instrument NIRCam, MIRI
Exposure Dates 2 June 2022, 4 June 2022
Filters NIRCam>F090W, F150W, F200W, F277W, F356W, F444W  MIRI> F770W, F1130W
About The Image
Color Info These images are a composite of separate exposures acquired by the James Webb Space Telescope using the NIRCam and MIRI instruments. Several filters were used to sample wide wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:   Blue: F090W, F150W Green: F200W Orange: F277W + F770W Red: F356W +444W + F1130W
Compass Image A black, deep-space background is punctuated with more than a hundred randomly spaced red, white and orange galaxies in this astronomical image. These galaxies are various shapes and apparent sizes. Dominating the foreground is an object that at first appears to be a brilliant, 6-pointed, orange star surrounded by wisps of orange gas and bluish purple nebulosity. In reality, what seems to be a star is actually two colliding galaxies with merging cores. The brilliant light from the star-formation surrounding these cores creates diffraction spikes — the prominent starburst feature. Several tiny, whitish yellow regions appear almost dead center on this feature. On the outskirts of the merger are faint, grainy, nearly transparent areas that look like bluish purple clouds. Reddish orange streams and filaments appear across the foreground object.
About The Object
Object Name A name or catalog number that astronomers use to identify an astronomical object.
Object Description The type of astronomical object.
R.A. Position Right ascension – analogous to longitude – is one component of an object's position.
Dec. Position Declination – analogous to latitude – is one component of an object's position.
Constellation One of 88 recognized regions of the celestial sphere in which the object appears.
Distance The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.
Dimensions The physical size of the object or the apparent angle it subtends on the sky.
About The Data
Data Description
  • Proposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
  • Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.
Instrument The science instrument used to produce the data.
Exposure Dates The date(s) that the telescope made its observations and the total exposure time.
Filters The camera filters that were used in the science observations.
About The Image
Image Credit The primary individuals and institutions responsible for the content.
Publication Date The date and time the release content became public.
Color Info A brief description of the methods used to convert telescope data into the color image being presented.
Orientation The rotation of the image on the sky with respect to the north pole of the celestial sphere.

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