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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We use the Marcario Low Resolution Spectrograph (LRS) at theHobby-Eberly-Telescope (HET) to study the kinematics of pseudobulges andclassical bulges in the nearby universe. We present major-axis rotationalvelocities, velocity dispersions, and h3 and h4 moments derived fromhigh-resolution (sigma ~ 39 km/s) spectra for 45 S0 to Sc galaxies; for 27 ofthe galaxies we also present minor axis data. We combine our kinematics withbulge-to-disk decompositions. We demonstrate for the first time that purelykinematic diagnostics of the bulge dichotomy agree systematically with thosebased on S\'ersic index. Low S\'ersic index bulges have both increasedrotational support (higher v/sigma values) and on average lower centralvelocity dispersions. Furthermore, we confirm that the same correlation alsoholds when visual morphologies are used to diagnose bulge type. The previouslynoted trend of photometrically flattened bulges to have shallower velocitydispersion profiles turns to be significant and systematic if the S\'ersicindex is used to distinguish between pseudobulges and classical bulges. Thecorrelation between h3 and v/sigma observed in elliptical galaxies is alsoobserved in intermediate type galaxies, irrespective of bulge type. Finally, wepresent evidence for formerly undetected counter rotation in the two systemsNGC 3945 and NGC 4736.  Based on observations obtained with the Hobby-Eberly Telescope, which is ajoint project of the University of Texas at Austin, the Pennsylvania StateUniversity, Stanford University, Ludwig-Maximilians-Universit\"at M\"unchen,and Georg-August-Universit\"at G\"ottingen.

Kinematic Signatures of Bulges Correlate with Bulge Morphologies and S\'ersic Index