MeerKAT discovery of an infalling cold gas tail on to the nearby barred spiral galaxy, NGC 5643

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646704" target="_blank" >RIV/67985815:90106/25:00646704 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1093/mnras/staf832" target="_blank" >https://doi.org/10.1093/mnras/staf832</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staf832" target="_blank" >10.1093/mnras/staf832</a>

Jazyk výsledku

angličtina

Název v původním jazyce

MeerKAT discovery of an infalling cold gas tail on to the nearby barred spiral galaxy, NGC 5643

Popis výsledku v původním jazyce

The detailed study of gas flows in local active galactic nuclei (AGN) is essential for understanding the regulation of star formation and black hole growth, which are fundamental to galaxy evolution. One such AGN case study is NGC 5643, a nearby (D-L similar to 17.3 Mpc) star-forming, late-type, Seyfert galaxy, where inflows and outflows have been observed in detail. NGC 5643 has been studied at multiple wavelengths, however, a key missing component is sensitive, high-resolution neutral hydrogen (H i) observations. We present 21-cm observations of NGC 5643 with MeerKAT, revealing six low-H i mass (M-HI similar to 10(7 )M(circle dot)) sources surrounding NGC 5643 and H i in IC 4444, similar to 230 kpc north of NGC 5643. In NGC 5643, H i extends beyond the stellar disc with several morphological and kinematical asymmetries. North of the disc is an extended 30 kpc tail with counterrotating velocities. This is H i gas accreting on to the regularly rotating disc of NGC 5643 from the environment. Within the spiral arms of the disc, we identify extraplanar gas components, tracing galactic fountains driven by star formation regions. These fountains have a molecular gas component and show an increased H-2/H i ratio. In the circum-nuclear region, we observe spatially unresolved H i absorption that is slightly blue-shifted (similar to 72 km s(-1)) with an H i emission counterpart at red-shifted velocities. These MeerKAT observations provide a complete census of the H i in and around this nearby Seyfert galaxy, providing missing information on the cold gas flows fuelling the star formation and nuclear activity.

Název v anglickém jazyce

MeerKAT discovery of an infalling cold gas tail on to the nearby barred spiral galaxy, NGC 5643

Popis výsledku anglicky

The detailed study of gas flows in local active galactic nuclei (AGN) is essential for understanding the regulation of star formation and black hole growth, which are fundamental to galaxy evolution. One such AGN case study is NGC 5643, a nearby (D-L similar to 17.3 Mpc) star-forming, late-type, Seyfert galaxy, where inflows and outflows have been observed in detail. NGC 5643 has been studied at multiple wavelengths, however, a key missing component is sensitive, high-resolution neutral hydrogen (H i) observations. We present 21-cm observations of NGC 5643 with MeerKAT, revealing six low-H i mass (M-HI similar to 10(7 )M(circle dot)) sources surrounding NGC 5643 and H i in IC 4444, similar to 230 kpc north of NGC 5643. In NGC 5643, H i extends beyond the stellar disc with several morphological and kinematical asymmetries. North of the disc is an extended 30 kpc tail with counterrotating velocities. This is H i gas accreting on to the regularly rotating disc of NGC 5643 from the environment. Within the spiral arms of the disc, we identify extraplanar gas components, tracing galactic fountains driven by star formation regions. These fountains have a molecular gas component and show an increased H-2/H i ratio. In the circum-nuclear region, we observe spatially unresolved H i absorption that is slightly blue-shifted (similar to 72 km s(-1)) with an H i emission counterpart at red-shifted velocities. These MeerKAT observations provide a complete census of the H i in and around this nearby Seyfert galaxy, providing missing information on the cold gas flows fuelling the star formation and nuclear activity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

—

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

540

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

2396-2412

Kód UT WoS článku

001505416700001

EID výsledku v databázi Scopus

2-s2.0-105008287595