Diffuse X-Ray-emitting Gas in the Central Region of Star-forming Galaxies

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646358" target="_blank" >RIV/67985815:90106/25:00646358 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-4357/ade71a" target="_blank" >https://doi.org/10.3847/1538-4357/ade71a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ade71a" target="_blank" >10.3847/1538-4357/ade71a</a>

Result language

angličtina

Original language name

Diffuse X-Ray-emitting Gas in the Central Region of Star-forming Galaxies

Original language description

The interstellar medium of galaxies, with temperatures reaching several million degrees, provides a pivotal perspective for understanding the physical and chemical properties of star formation, galactic evolution, and their associated feedback mechanisms. We use archival data from Chandra observations to extract the diffuse X-ray emission from 23 nearby star-forming galaxies and study its correlation with star formation activity in the central region of these galaxies. The surface brightness profile of each galaxy presents a sharp decrease in the central region of similar to 0.3-2 kpc and then varies slowly outside this range. Compared to the global relation between the diffuse thermal X-ray luminosity from hot gas (L-0.5-2 keV(gas)) and the star formation rate (SFR), we found a superlinear relation of log (L-gas0.5 2 keV/erg s(-1)) = 1.34 log(SFR/M-psi yr(-1)) + 40.15 for the center of these sample galaxies. This result suggests that more intense stellar feedback is associated with stronger star formation activity in the central region of star-forming galaxies, where more energy output from supernovae and stellar winds is converted into X-ray flux. Furthermore, the slope of the L-0.5-2 keV(gas)SFR relation anticorrelates with spatial scale in the galactic central region. This indicates that the characteristics of central hot gas emission are gradually averaged over larger areas. The diffuse X-ray luminosity also shows a good correlation with molecular gas, stellar mass, and midplane pressure traced by the baryonic mass, although these relations show relatively large scatter. Unified Astronomy Thesaurus concepts: Star formation (1569), Interstellar medium (847), Spiral galaxies (1560), Scaling relations (2031).

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

—

Publication year

2025

Confidentiality

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

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

988

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

263

UT code for WoS article

001539947800001

EID of the result in the Scopus database

2-s2.0-105012041284