originally posted by: ElectricUniverse
a reply to: JadeStar
How do you explain that extreme trans-Neptunian objects (ETNOs) are so closely bunch together having an argument of perihelion close to 0 degrees?
Some large object/s has/have to keep them there. They can't just stay in that orbit by magic.
manuscript no. aCenD_ALMA_Letter
December 10, 2015
etter to the
A new submm source within a few arcseconds of
ALMA discovers the most distant object of the solar system
, W. Vlemmings
, E. O’Gorman
, E. Bertone
, M. Chavez
, and V. De la Luz
Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala,
Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Luis Enrique Erro 1, Sta. María Tonantzintla, Puebla, Mexico,
CONACYT Research Fellow, SCiESMEX, Instituto de Geofisica, Unidad Michoacan, Universidad Nacional Autonoma de Mexico,
Morelia, Michoacan, Mexico. CP 58190
Received ; accepted
The understanding of the formation of stellar and planetary systems requires the understanding of the structure and dynamics of their outmost regions, where large bodies are not expected to form.
Serendipitous searches for Sedna-like objects allows the observation of regions that are normally not surveyed.
The Atacama Large Millimeter/submillimeter Array (ALMA) is particularly sensitive to point sources and it presents currently the only means to detect Sedna-like objects far beyond their perihelia.
ALMA observations 10 months apart revealed a new blackbody point source that is apparently comoving with (Alpha)Cen AB.
We exclude that source to be a sub-/stellar member of the (alpha) Cen system, but argue that it is either an extreme TNO, a Super-Earth or a very cool brown dwarf in the outer realm of the solar system.
The serendipitous discovery of a possible new solar system object with ALMA
W. H. T. Vlemmings 1 ,⋆, S. Ramstedt 2, M. Maercker 1, B. Davidsson 2
1 Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden
2Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden
December 10, 2015
The unprecedented sensitivity of the Atacama Large millimeter/submillimeter array (ALMA) is providing many new dis-coveries. Several of these are serendipitous to the original goal of the observations.
We report the discovery of previously unknown continuum sources, or a single fast moving new source, in our ALMA obser-vations. Here we aim to determine the nature of the detections.
The detections, at > 5.8 σ in the image plane and > 14 σ in the (u, v) − plane, were made in two epochs of ALMA observations of a 25′′ region around the asymptotic giant branch star W Aql in the continuum around 345 GHz. At a third epoch, covering 50′′ ×50′′ ,the source(s) were not seen.
We have investigated if the detections could be spurious, if they could constitute a population of variable background sources, or if the observations revealed a fast moving single object.
Based on our analysis, we conclude that a single object (with a flux of ∼ 3.0 mJy) exhibiting a large proper motion (∼ 87′′ yr−1) is the most likely explanation. Until the nature of the source becomes clear, we have named it Gna.
Unless there are yet unknown, but significant, issues with ALMA observations, we have detected a previously unknown objects in our solar system. Based on proper motion analysis we find that, if it is gravitationally bound, Gna is currently located at 12−25 AU distance and has a size of ∼220−880 km. Alternatively it is a much larger, planet-sized, object, gravitationally unbound, and located within∼4000 AU, or beyond (out to∼0.3 pc) if it is strongly variable. Our observations highlight the power of ALMA in detecting possible solar system objects, but also show how multiple epoch observations are crucial to identify what are otherwise probably assumed to be extra-galactic sources
originally posted by: DJW001
The crucial phrase being "if it is gravitationally bound."
originally posted by: wildespace
Is there a need for something to keep them in such orbits, like the orbits would gradually change without that influence? Or could have something (like a passing star) set those bodies in their current orbits, and then left?