Revisiting the Stellar Mass-Angular Momentum-Morphology Relation: Extension to Higher Bulge Fraction and the Effect of Bulge Type

Sarah M. Sweet, David Fisher, Karl Glazebrook, Danail Obreschkow, Claudia Lagos, Liang Wang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present the relation between stellar specific angular momentum j , stellar mass M , and bulge-to-total light ratio β for The H i Nearby Galaxy Survey, the Calar Alto Legacy Integral Field Area Survey, and Romanowsky & Fall data sets, exploring the existence of a fundamental plane between these parameters, as first suggested by Obreschkow & Glazebrook. Our best-fit M -j relation yields a slope of α = 1.03 ± 0.11 with a trivariate fit including β. When ignoring the effect of β, the exponent α = 0.56 ± 0.06 is consistent with α = 2/3 that is predicted for dark matter halos. There is a linear β-j /M relation for β ≲ 0.4, exhibiting a general trend of increasing β with decreasing j /M . Galaxies with β α 0.4 have higher j than predicted by the relation. Pseudobulge galaxies have preferentially lower β for a given j /M than galaxies that contain classical bulges. Pseudobulge galaxies follow a well-defined track in β-j /M space, consistent with Obreschkow & Glazebrook, while galaxies with classical bulges do not. These results are consistent with the hypothesis that while growth in either bulge type is linked to a decrease in j /M , the mechanisms that build pseudobulges seem to be less efficient at increasing bulge mass per decrease in specific angular momentum than those that build classical bulges.

Original languageEnglish
Article number37
JournalThe Astrophysical Journal
Volume860
Issue number1
DOIs
Publication statusPublished - 10 Jun 2018

Fingerprint Dive into the research topics of 'Revisiting the Stellar Mass-Angular Momentum-Morphology Relation: Extension to Higher Bulge Fraction and the Effect of Bulge Type'. Together they form a unique fingerprint.

  • Cite this