Curious Binary System Seen by ALMA

Nrao_nrao_gallery_image2-dust-emission-blue-red_1024

nrao_NRAO_Gallery_Image2-Dust-emission-blue-red  

Credit: ALMA (ESO/NAOJ/NRAO); J. D. Ilee / University of Leeds

Astronomers using ALMA have found two young stars with wildly different masses forming in the same protoplanetary disk. The main central star, MM1a, is 80 times more massive than its companion, MM1b. Their striking difference in size suggests that they formed by following two very different paths. The more massive star took the more traditional route by collapsing under gravity out of a dense core of gas. The smaller one likely followed the road less traveled by at least for stars by accumulating mass from a portion of the disk that fragmented away as it matured, a process that may have more in common with the birth of gas-giant planets. Observation of the dust emission (green) and the cool gas around MM1a (red is receding gas, blue is approaching gas), indicates that the outflow cavity rotates in the same sense as the central accretion disc. MM1b is seen orbiting in the lower left.

Image Source: https://public.nrao.edu/news/2018-alma-fragmenting-disk/

Curator: NRAO/AUI/NSF, Charlottesville, Virginia, USA

Image Use Policy: Creative Commons Attribution 3.0 Unported license (http://creativecommons.org/licenses/by/3.0/)

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Image Details

Image Type
Observation
Object Name
MM1a MM1b
Subject - Milky Way
Star > Evolutionary Stage > Protostar
Star > Evolutionary Stage > Protostar

Distance

Universescale1
11 ly

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_green ALMA Millimeter -
Arrow_left_red ALMA Millimeter -
Arrow_left_blue ALMA Millimeter -
Nrao_nrao_gallery_image2-dust-emission-blue-red_1280
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ID
NRAO_Gallery_Image2-Dust-emission-blue-red
Subject Category
B.3.1.1   B.3.1.1  
Subject Name
MM1a, MM1b
Credits
ALMA (ESO/NAOJ/NRAO); J. D. Ilee / University of Leeds
Release Date
Lightyears
11
Redshift
000
Reference Url
https://public.nrao.edu/news/2018-alma-fragmenting-disk/
Type
Observation
Image Quality
Good
Distance Notes
Facility
ALMA, ALMA, ALMA
Instrument
Color Assignment
Green, Red, Blue
Band
Millimeter, Millimeter, Millimeter
Bandpass
Central Wavelength
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
Equinox
Reference Value
Reference Dimension
Reference Pixel
Scale
Rotation
Coordinate System Projection:
Quality
FITS Header
Notes
Creator (Curator)
NRAO/AUI/NSF
URL
https://public.nrao.edu
Name
NRAO/AUI/NSF
Email
outreach@nrao.edu
Telephone
Address
520 Edgemont Road
City
Charlottesville
State/Province
Virginia
Publisher
NRAO/AUI/NSF
Publisher ID
nrao
Resource ID
Metadata Date
2018-12-14T09:23:49-05:00
Metadata Version
1.1
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Detailed color mapping information coming soon...

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Universescalefull
11