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 present a stellar dynamical mass measurement of a newly detectedsupermassive black hole (SMBH) at the center of the fast-rotating, massiveelliptical galaxy NGC 2693 as part of the MASSIVE survey. We combine highsignal-to-noise integral field spectroscopy (IFS) from the Gemini Multi-ObjectSpectrograph (GMOS) with wide-field data from the Mitchell Spectrograph atMcDonald Observatory to extract and model stellar kinematics of NGC 2693 fromthe central $\sim 150$ pc out to $\sim2.5$ effective radii. Observations fromHubble Space Telescope (HST) WFC3 are used to determine the stellar lightdistribution. We perform fully triaxial Schwarzschild orbit modeling using thelatest TriOS code and a Bayesian search in 6-D galaxy model parameter space todetermine NGC 2693's SMBH mass ($M_\text{BH}$), stellar mass-to-light ratio,dark matter content, and intrinsic shape. We find $M_\text{BH} = \left(1.7\pm0.4\right)\times 10^{9}\ M_\odot$ and a triaxial intrinsic shape with axisratios $p=b/a=0.902 \pm 0.009$ and $q=c/a=0.721^{+0.011}_{-0.010}$, triaxialityparameter $T = 0.39 \pm 0.04$. In comparison, the best-fit orbit model in theaxisymmetric limit and (cylindrical) Jeans anisotropic model of NGC 2693 prefer$M_\text{BH} = \left(2.4\pm 0.6\right)\times 10^{9}\ M_\odot$ and $M_\text{BH}= \left(2.9\pm 0.3\right)\times 10^{9}\ M_\odot$, respectively. Neither modelcan account for the non-axisymmetric stellar velocity features present in theIFS data.

The MASSIVE Survey -- XVII. A Triaxial Orbit-based Determination of the Black Hole Mass and Intrinsic Shape of Elliptical Galaxy NGC 2693