A 3D model for the stellar populations in the nuclei of NGC 1433, NGC 1566, and NGC 1808 NIR photometry, CO absorption lines, and line-of-sight velocity and its dispersion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00574034" target="_blank" >RIV/67985815:_____/23:00574034 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0344395" target="_blank" >https://hdl.handle.net/11104/0344395</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202245627" target="_blank" >10.1051/0004-6361/202245627</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A 3D model for the stellar populations in the nuclei of NGC 1433, NGC 1566, and NGC 1808 NIR photometry, CO absorption lines, and line-of-sight velocity and its dispersion

Popis výsledku v původním jazyce

We aim to characterize the properties of the stellar populations in the central few hundred parsecs of nearby galactic nuclei, specifically their age, mass, and 3D geometry. We use spatially resolved spectroscopic observations of NGC 1433, NGC 1566, and NGC 1808 obtained with SINFONI to constrain a 3D model composed of a spherically symmetric nuclear star cluster (NSC) and an extended thick stellar disk. We computed UV to mid-infrared single stellar population (UMISSP) spectra to determine the age of the stellar populations and construct synthetic observations for our model. To overcome degeneracies between key parameters, we simultaneously fit the spatially resolved line-of-sight velocity, line-of-sight-velocity-dispersion, low-spectral-resolution NIR continuum, and high-spectral-resolution CO absorption features for each pixel. For the three objects, we derive the age and mass of the young and old stellar populations in the NSC and surrounding disk, as well as their 3D geometry: radius for the NSC, thickness, inclination, and position angle for the disk. These results are consistent with published independent measurements when available. The proposed method allows us to derive a consistent 3D model of the stellar populations in nearby galactic centers solely based on a near-infrared IFU observation.

Název v anglickém jazyce

A 3D model for the stellar populations in the nuclei of NGC 1433, NGC 1566, and NGC 1808 NIR photometry, CO absorption lines, and line-of-sight velocity and its dispersion

Popis výsledku anglicky

We aim to characterize the properties of the stellar populations in the central few hundred parsecs of nearby galactic nuclei, specifically their age, mass, and 3D geometry. We use spatially resolved spectroscopic observations of NGC 1433, NGC 1566, and NGC 1808 obtained with SINFONI to constrain a 3D model composed of a spherically symmetric nuclear star cluster (NSC) and an extended thick stellar disk. We computed UV to mid-infrared single stellar population (UMISSP) spectra to determine the age of the stellar populations and construct synthetic observations for our model. To overcome degeneracies between key parameters, we simultaneously fit the spatially resolved line-of-sight velocity, line-of-sight-velocity-dispersion, low-spectral-resolution NIR continuum, and high-spectral-resolution CO absorption features for each pixel. For the three objects, we derive the age and mass of the young and old stellar populations in the NSC and surrounding disk, as well as their 3D geometry: radius for the NSC, thickness, inclination, and position angle for the disk. These results are consistent with published independent measurements when available. The proposed method allows us to derive a consistent 3D model of the stellar populations in nearby galactic centers solely based on a near-infrared IFU observation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

674

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

16

Strana od-do

A135

Kód UT WoS článku

001007989800002

EID výsledku v databázi Scopus

2-s2.0-85163173712