Stellar and dust properties in a sample of blue early type galaxies
This paper presents a comparative study of physical properties of a sample of 89 blue early-type galaxies (ETGs) from the local universe by fitting SEDs to their multi-wavelength photometric and spectroscopic data. The detailed template-based SED fitting analysis using the MAGPHY S and SED3...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Astronomical Observatory, Department of Astronomy, Belgrade
2022-01-01
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| Series: | Serbian Astronomical Journal |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-698X/2022/1450-698X2205023D.pdf |
| _version_ | 1827993704342749184 |
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| author | Deshmukh S.P. Vagshette N.D. Patil M.K. |
| author_facet | Deshmukh S.P. Vagshette N.D. Patil M.K. |
| author_sort | Deshmukh S.P. |
| collection | DOAJ |
| description | This paper presents a comparative study of physical properties of a sample of
89 blue early-type galaxies (ETGs) from the local universe by fitting SEDs to
their multi-wavelength photometric and spectroscopic data. The detailed
template-based SED fitting analysis using the MAGPHY S and SED3FIT codes on
the interstellar dust extinction corrected UV-to-far-IR spectro-photometric
data enabled us to trace the evolutionary sequence of the blue ETGs on the
color-magnitude diagram. This study evidenced a decreasing trend of the SFR,
sSFR, dust mass, and dust mass fraction over the sequence from the SF - to -
the Seyferts - to - the LINERs. The UV-optical colors also enabled us to
estimate the look-back time of the last starburst phase in SF, Seyfert, and
LINER galaxies, probably pointing towards the evolutionary sequence of the
blue ETGs. Despite the blue colors and strong emission lines in the optical
regime of the electromagnetic spectrum, the blue ETGs in the present sample
occupy a position off the main sequence, commonly known as the green valley,
on the CMD plot and hence indicate the transitional state of their
non-secular evolution. A marginal positive correlation was noticed between
SFR per unit dust mass and the temperature of the cool ISM. The declining
trend of the cold dust temperature Tc over the sequence from the
SF-to-Seyfert-to-LINER implies that the AGNs in the systems are not enough
powerful to affect the cold component of the ISM. |
| first_indexed | 2024-04-10T04:29:55Z |
| format | Article |
| id | doaj.art-cf7712e6e99849f5be180da9545a925a |
| institution | Directory Open Access Journal |
| issn | 1450-698X 1820-9289 |
| language | English |
| last_indexed | 2024-04-10T04:29:55Z |
| publishDate | 2022-01-01 |
| publisher | Astronomical Observatory, Department of Astronomy, Belgrade |
| record_format | Article |
| series | Serbian Astronomical Journal |
| spelling | doaj.art-cf7712e6e99849f5be180da9545a925a2023-03-10T08:05:59ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X1820-92892022-01-012022205233210.2298/SAJ2205023D1450-698X2205023DStellar and dust properties in a sample of blue early type galaxiesDeshmukh S.P.0Vagshette N.D.1Patil M.K.2Department of Physics, Institute of Science, civil lines, Nagpur, IndiaDepartment of Physics and Electronics, Maharashtra Udaygiri Mahavidyalaya, Udgir, Latur, IndiaSwami Ramanand Teerth Marathwada University, Nanded, IndiaThis paper presents a comparative study of physical properties of a sample of 89 blue early-type galaxies (ETGs) from the local universe by fitting SEDs to their multi-wavelength photometric and spectroscopic data. The detailed template-based SED fitting analysis using the MAGPHY S and SED3FIT codes on the interstellar dust extinction corrected UV-to-far-IR spectro-photometric data enabled us to trace the evolutionary sequence of the blue ETGs on the color-magnitude diagram. This study evidenced a decreasing trend of the SFR, sSFR, dust mass, and dust mass fraction over the sequence from the SF - to - the Seyferts - to - the LINERs. The UV-optical colors also enabled us to estimate the look-back time of the last starburst phase in SF, Seyfert, and LINER galaxies, probably pointing towards the evolutionary sequence of the blue ETGs. Despite the blue colors and strong emission lines in the optical regime of the electromagnetic spectrum, the blue ETGs in the present sample occupy a position off the main sequence, commonly known as the green valley, on the CMD plot and hence indicate the transitional state of their non-secular evolution. A marginal positive correlation was noticed between SFR per unit dust mass and the temperature of the cool ISM. The declining trend of the cold dust temperature Tc over the sequence from the SF-to-Seyfert-to-LINER implies that the AGNs in the systems are not enough powerful to affect the cold component of the ISM.http://www.doiserbia.nb.rs/img/doi/1450-698X/2022/1450-698X2205023D.pdfgalaxies: star formationgalaxies: elliptical and lenticularcd |
| spellingShingle | Deshmukh S.P. Vagshette N.D. Patil M.K. Stellar and dust properties in a sample of blue early type galaxies Serbian Astronomical Journal galaxies: star formation galaxies: elliptical and lenticular cd |
| title | Stellar and dust properties in a sample of blue early type galaxies |
| title_full | Stellar and dust properties in a sample of blue early type galaxies |
| title_fullStr | Stellar and dust properties in a sample of blue early type galaxies |
| title_full_unstemmed | Stellar and dust properties in a sample of blue early type galaxies |
| title_short | Stellar and dust properties in a sample of blue early type galaxies |
| title_sort | stellar and dust properties in a sample of blue early type galaxies |
| topic | galaxies: star formation galaxies: elliptical and lenticular cd |
| url | http://www.doiserbia.nb.rs/img/doi/1450-698X/2022/1450-698X2205023D.pdf |
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