SIMBAD references

2018A&A...619A.106G - Astronomy and Astrophysics, volume 619A, 106-106 (2018/11-1)

3D shape of Orion A from Gaia DR2.

GROSSSCHEDL J.E., ALVES J., MEINGAST S., ACKERL C., ASCENSO J., BOUY H., BURKERT A., FORBRICH J., FURNKRANZ V., GOODMAN A., HACAR A., HERBST-KISS G., LADA C.J., LARREINA I., LESCHINSKI K., LOMBARDI M., MOITINHO A., MORTIMER D. and ZARI E.

Abstract (from CDS):

We use the Gaia DR2 distances of about 700 mid-infrared selected young stellar objects in the benchmark giant molecular cloud Orion A to infer its 3D shape and orientation. We find that Orion A is not the fairly straight filamentary cloud that we see in (2D) projection, but instead a cometary-like cloud oriented toward the Galactic plane, with two distinct components: a denser and enhanced star-forming (bent) Head, and a lower density and star-formation quieter ∼75pc long Tail. The true extent of Orion A is not the projected ∼40pc but ∼90pc, making it by far the largest molecular cloud in the local neighborhood. Its aspect ratio (∼30:1) and high column-density fraction (∼45%) make it similar to large-scale Milky Way filaments ("bones"), despite its distance to the galactic mid-plane being an order of magnitude larger than typically found for these structures.

Abstract Copyright: © ESO 2018

Journal keyword(s): methods: statistical - methods: observational - parallaxes - stars: distances - stars: formation - local insterstellar matter

VizieR on-line data: <Available at CDS (J/A+A/619/A106): tableb1.dat>

Status in Simbad:  being processed

Simbad objects: 695

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2018A&A...619A.106G and select 'bookmark this link' or equivalent in the popup menu


2019.12.06-08:51:32

© Université de Strasbourg/CNRS

    • Contact