2021ApJ...911...28W -
Astrophys. J., 911, 28-28 (2021/April-2)
The Milky Way Project: probing star formation with first results on yellowballs from DR2.
WOLF-CHASE G., KERTON C.R., DEVINE K., POUYDAL A., MORI J., TRUJILLO L., COSSAIRT A., SCHOULTZ S., JAYASINGHE T. and POVICH M.
Abstract (from CDS):
Yellowballs (YBs) were first discovered during the Milky Way Project (MWP) citizen science initiative. The MWP users noticed compact, yellow regions in Spitzer Space Telescope mid-infrared (MIR) images of the Milky Way plane and asked professional astronomers to explain these "yellow balls." Follow-up work by Kerton et al. determined that YBs likely trace compact photodissociation regions associated with massive and intermediate-mass star formation. The YBs were included as target objects in a version of the MWP launched in 2016, which produced a listing of over 6000 YB locations. We have measured distances, cross-match associations, physical properties, and MIR colors of ∼500 YBs within a pilot region covering the l = 30°-40°, b = ±1° region of the Galactic plane. We find that ∼20%-30% of YBs in our pilot region contain high-mass star formation capable of becoming expanding H II regions that produce MIR bubbles. A majority of YBs represent intermediate-mass star-forming regions whose placement in evolutionary diagrams suggest they are still actively accreting and may be precursors to optically revealed Herbig Ae/Be nebulae. Many of these intermediate-mass YBs were missed by surveys of massive star formation tracers; thus, this catalog provides information for many new sites of star formation. Future work will expand this pilot region analysis to the entire YB catalog.
Abstract Copyright:
© 2021. The American Astronomical Society. All rights reserved.
Journal keyword(s):
Star formation - Surveys - Catalogs
VizieR on-line data:
<Available at CDS (J/ApJ/911/28): table1.dat table2.dat table3.dat table4.dat table6.dat>
Status at CDS
:
Examining the need for a new acronym. // All or part of tables of objects will not be ingested in SIMBAD.
Simbad objects:
3
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