Research output: Contribution to journal › Article › peer-review
Accurate Decomposition of Galaxies with Spiral Arms: Dust Properties and Distribution. / Marchuk, Alexander A.; Chugunov, Ilia V.; Galliano, Frédéric; Mosenkov, Aleksandr V.; Strekalova, Polina V.; Савченко, Сергей Сергеевич; Kostiuk, Valeria S.; Gontcharov, George A.; Il’in, Vladimir B.; Smirnov, Anton A.; Poliakov, Denis M.
In: Galaxies, Vol. 13, No. 2, 39, 09.04.2025.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Accurate Decomposition of Galaxies with Spiral Arms: Dust Properties and Distribution
AU - Marchuk, Alexander A.
AU - Chugunov, Ilia V.
AU - Galliano, Frédéric
AU - Mosenkov, Aleksandr V.
AU - Strekalova, Polina V.
AU - Савченко, Сергей Сергеевич
AU - Kostiuk, Valeria S.
AU - Gontcharov, George A.
AU - Il’in, Vladimir B.
AU - Smirnov, Anton A.
AU - Poliakov, Denis M.
PY - 2025/4/9
Y1 - 2025/4/9
N2 - We analyze three nearby spiral galaxies—NGC 1097, NGC 1566, and NGC 3627—using images from the DustPedia database in seven infrared bands (3.6, 8, 24, 70, 100, 160, and 250 μm). For each image, we perform photometric decomposition and construct a multi-component model, including a detailed representation of the spiral arms. Our results show that the light distribution is well described by an exponential disk and a Sérsic bulge when non-axisymmetric components are properly taken into account. We test the predictions of the stationary density wave theory using the derived models in bands, tracing both old stars and recent star formation. Our findings suggest that the spiral arms in all three galaxies are unlikely to originate from stationary density waves. Additionally, we perform spectral energy distribution (SED) modeling using the hierarchical Bayesian code HerBIE, fitting individual components to derive dust properties. We find that spiral arms contain a significant (>10%) fraction of cold dust, with an average temperature of approximately 18–20 K. The estimated fraction of polycyclic aromatic hydrocarbons (PAHs) declines significantly toward the galactic center but remains similar between the arm and interarm regions.
AB - We analyze three nearby spiral galaxies—NGC 1097, NGC 1566, and NGC 3627—using images from the DustPedia database in seven infrared bands (3.6, 8, 24, 70, 100, 160, and 250 μm). For each image, we perform photometric decomposition and construct a multi-component model, including a detailed representation of the spiral arms. Our results show that the light distribution is well described by an exponential disk and a Sérsic bulge when non-axisymmetric components are properly taken into account. We test the predictions of the stationary density wave theory using the derived models in bands, tracing both old stars and recent star formation. Our findings suggest that the spiral arms in all three galaxies are unlikely to originate from stationary density waves. Additionally, we perform spectral energy distribution (SED) modeling using the hierarchical Bayesian code HerBIE, fitting individual components to derive dust properties. We find that spiral arms contain a significant (>10%) fraction of cold dust, with an average temperature of approximately 18–20 K. The estimated fraction of polycyclic aromatic hydrocarbons (PAHs) declines significantly toward the galactic center but remains similar between the arm and interarm regions.
KW - dust in galaxies
KW - galactic dynamics and kinematics
KW - galaxies
KW - photometric decomposition
KW - spiral arms
KW - spiral structure
UR - https://www.mendeley.com/catalogue/93f8e127-c569-3cb7-b66f-eef58ec719dc/
U2 - 10.3390/galaxies13020039
DO - 10.3390/galaxies13020039
M3 - Article
VL - 13
JO - Galaxies
JF - Galaxies
SN - 2075-4434
IS - 2
M1 - 39
ER -
ID: 134452067