Au Mic (nircam)

Au Mic (nircam)

Estas dos imágenes son del disco de escombros polvorientos alrededor de Au Mic, una estrella enana roja ubicada a 32 años luz de distancia en el microscopio de la constelación sur. El equipo usó la cámara de infrarrojo cercana de Webb (NIRCAM) para estudiar Au Mic. El coronagraph de Nircam, que bloqueó la intensa luz de la estrella central, permitió al equipo estudiar la región muy cerca de la estrella. La ubicación de la estrella, que está enmascarada, está marcada por una representación gráfica blanca en el centro de cada imagen. La región bloqueada por el coronagraph se muestra mediante un círculo discontinuo.

Webb proporcionó imágenes a 3.56 micras (arriba, azul) y 4.44 micras (abajo, rojo). The team found that the disk was brighter at the shorter or “bluer” wavelength, likely meaning that it contains a lot of fine dust that is more efficient at scattering shorter wavelengths of light.

The NIRCam images allowed the researchers to trace the disk, which spans a diameter of 60 astronomical units (5.6 billion miles), as close to the star as 5 astronomical units (460 million miles) – the equivalente de la órbita de Júpiter en nuestro sistema solar. Las imágenes eran más detalladas y brillantes de lo que esperaba el equipo, y los científicos pudieron obtener imágenes del disco más cercano a la estrella de lo esperado.

créditos

Science

nasa, ESA, CSA, Kellen Lawson (NASA-GSFC), Joshua E. Schlieder (NASA-GSFC)

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ImageSe Procesamiento

Alyssa Pagan (STSCI)

About The Object
Object Name AU Mic, AU Micrscopii
Object Description Debris Disk Around Nearby Star
R.A. Position 20:45:9.49
Dec. Position -31:20:26.99
Constellation Microscopium
Distance 32 light-years (9.79 parsecs)
About The Data
Data Description This image was created with Webb data from proposal: (J. Schlieder).
Instrument NIRCam
Exposure Dates 03 Oct 2022
Filters F356W, F444W
About The Image
Color Info The images are separate exposures acquired by the NIRCam instrument on the James Webb Space Telescope. The color results from assigning a cyan and red hue to monochromatic (grayscale) images.
Compass Image This image shows two views of the dusty debris disk around the red dwarf star AU Mic. The top panel is the disk at 3.56 microns. The disk appears as a fuzzy, blue, horizontal line broken in the middle by a black region outlined by a white, dashed circle. In the center of that region is a white, graphical star, which represents AU Mic. The actual star is blocked out in this image by Webb’s NIRCam coronagraph. The bottom panel is the second view of the disk, at 4.44 microns. The disk appears as a fuzzy, red, horizontal line broken in the middle by a black region outlined by a white, dashed circle. As in the top panel, in the center of that region is a cartoonish star representing AU Mic. The actual star is blocked out by the NIRCam’s coronagraph. Please reference the extended text description for more details.
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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