English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The GLIMPSE (Galactic Legacy Mid-Plane Survey Extraordinaire) Point SourceCatalog of ~ 30 million mid-infrared sources towards the inner Galaxy, 10 < |l|< 65 degrees and |b| < 1 degree, was used to determine the distribution ofstars in Galactic longitude, latitude, and apparent magnitude. The countsversus longitude can be approximated by the modified Bessel functionN=N_0*(l/l_0)*K_1(l/l_0), where l_0 is insensitive to limiting magnitude, bandchoice, and side of Galactic center: l_0= 17-30 degrees with a best fit valuein the the 4.5 micron band of l_0=24 +/- 4 degrees. Modeling the sourcedistribution as an exponential disk yields a radial scale length of H= 3.9 +/-0.6 kpc. There is a pronounced north-south asymmetry in source counts for |l| <30 degrees, with ~ 25% more stars in the north. For l=10-30 degrees, there is astrong enhancement of stars of m= 11.5-13.5 mag. A linear bar passing throughthe Galactic center with half-length R_bar=4.4 +/- 0.5 kpc, tilted by phi=44+/- 10 degrees to the Sun-Galactic Center line, provides the simplestinterpretation of this data. We examine the possibility that enhanced sourcecounts at l=26-28 degrees, 31.5-34 degrees, and 306-309 degrees are related toGalactic spiral structure. Total source counts are depressed in regions wherethe counts of red objects (m_K-m_[8.0] >3) peak. In these areas, the counts arereduced by extinction due to molecular gas and/or high diffuse backgroundsassociated with star formation.

First GLIMPSE Results on the Stellar Structure of the Galaxy