DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies
We explore the growth of the stellar disks in 14 nearby spiral galaxies as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey. We study the radial distribution of specific star formation rates (sSFRs) and investigate the ratio o...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad029b |
| _version_ | 1797385942223290368 |
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| author | Mansi Padave Sanchayeeta Borthakur Hansung B. Gim David Thilker Rolf A. Jansen Jacqueline Monkiewicz Robert C. Kennicutt Guinevere Kauffmann Andrew J. Fox Emmanuel Momjian Timothy Heckman |
| author_facet | Mansi Padave Sanchayeeta Borthakur Hansung B. Gim David Thilker Rolf A. Jansen Jacqueline Monkiewicz Robert C. Kennicutt Guinevere Kauffmann Andrew J. Fox Emmanuel Momjian Timothy Heckman |
| author_sort | Mansi Padave |
| collection | DOAJ |
| description | We explore the growth of the stellar disks in 14 nearby spiral galaxies as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey. We study the radial distribution of specific star formation rates (sSFRs) and investigate the ratio of the difference in the outer and inner sSFRs (Δ _sSFR = sSFR _out – sSFR _in ) of the disk and the total sSFR, Δ _sSFR /sSFR, to quantify disk growth. We find Δ _sSFR /sSFR and the H i gas fraction to show a mild correlation of Spearman’s ρ = 0.30, indicating that star formation and disk growth are likely to proceed outward in galactic disks with high H i gas fractions. The H i gas fractions and Δ _sSFR /sSFR of the galaxies also increase with the distance to the nearest L _⋆ neighbor, suggesting that galaxies are likely to sustain the cold gas in their interstellar medium and exhibit inside-out growth in isolated environments. However, the H i content in their circumgalactic medium (CGM), probed by the Ly α equivalent width ( W _Ly _α ) excess, is observed to be suppressed in isolated environments, as is apparent from the strong anticorrelation between the W _Ly _α excess and the distance to the fifth nearest L _⋆ neighbor (Spearman’s ρ = −0.62). As expected, W _Ly _α is also found to be suppressed in cluster galaxies. We find no relation between the W _Ly _α excess of the detected CGM absorber and Δ _sSFR /sSFR, implying that the enhancement and suppression of the circumgalactic H i gas does not affect the direction in which star formation proceeds in a galactic disk or vice versa. |
| first_indexed | 2024-03-08T22:01:35Z |
| format | Article |
| id | doaj.art-e9c3003939714172be373507938b8775 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-08T22:01:35Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-e9c3003939714172be373507938b87752023-12-19T14:38:37ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0196012410.3847/1538-4357/ad029bDIISC-III. Signatures of Stellar Disk Growth in Nearby GalaxiesMansi Padave0https://orcid.org/0000-0002-3472-0490Sanchayeeta Borthakur1https://orcid.org/0000-0002-2724-8298Hansung B. Gim2https://orcid.org/0000-0003-1436-7658David Thilker3https://orcid.org/0000-0002-8528-7340Rolf A. Jansen4https://orcid.org/0000-0003-1268-5230Jacqueline Monkiewicz5Robert C. Kennicutt6https://orcid.org/0000-0001-5448-1821Guinevere Kauffmann7Andrew J. Fox8https://orcid.org/0000-0003-0724-4115Emmanuel Momjian9https://orcid.org/0000-0003-3168-5922Timothy Heckman10https://orcid.org/0000-0001-6670-6370School of Earth & Space Exploration, Arizona State University , Tempe, AZ 85287-1404, USASchool of Earth & Space Exploration, Arizona State University , Tempe, AZ 85287-1404, USADepartment of Physics, Montana State University , P.O. Box 173840, Bozeman, MT 59717, USADepartment of Physics & Astronomy, Johns Hopkins University , Baltimore, MD 21218, USASchool of Earth & Space Exploration, Arizona State University , Tempe, AZ 85287-1404, USASchool of Earth & Space Exploration, Arizona State University , Tempe, AZ 85287-1404, USADepartment of Astronomy and Steward Observatory, University of Arizona , Tucson, AZ 85721, USA; Department of Physics and Astronomy, Texas A&M University , College Station, TX 77843, USAMax-Planck-Institute für Astrophysik , Karl-Schwarzschild-Straβe 1, D-85740 Garching, GermanyAURA for ESA, Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USANational Radio Astronomy Observatory , 1003 Lopezville Road, Socorro, NM 87801, USADepartment of Physics & Astronomy, Johns Hopkins University , Baltimore, MD 21218, USAWe explore the growth of the stellar disks in 14 nearby spiral galaxies as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey. We study the radial distribution of specific star formation rates (sSFRs) and investigate the ratio of the difference in the outer and inner sSFRs (Δ _sSFR = sSFR _out – sSFR _in ) of the disk and the total sSFR, Δ _sSFR /sSFR, to quantify disk growth. We find Δ _sSFR /sSFR and the H i gas fraction to show a mild correlation of Spearman’s ρ = 0.30, indicating that star formation and disk growth are likely to proceed outward in galactic disks with high H i gas fractions. The H i gas fractions and Δ _sSFR /sSFR of the galaxies also increase with the distance to the nearest L _⋆ neighbor, suggesting that galaxies are likely to sustain the cold gas in their interstellar medium and exhibit inside-out growth in isolated environments. However, the H i content in their circumgalactic medium (CGM), probed by the Ly α equivalent width ( W _Ly _α ) excess, is observed to be suppressed in isolated environments, as is apparent from the strong anticorrelation between the W _Ly _α excess and the distance to the fifth nearest L _⋆ neighbor (Spearman’s ρ = −0.62). As expected, W _Ly _α is also found to be suppressed in cluster galaxies. We find no relation between the W _Ly _α excess of the detected CGM absorber and Δ _sSFR /sSFR, implying that the enhancement and suppression of the circumgalactic H i gas does not affect the direction in which star formation proceeds in a galactic disk or vice versa.https://doi.org/10.3847/1538-4357/ad029bSpiral galaxiesDisk galaxiesStar formationInterstellar mediumH I line emissionCircumgalactic medium |
| spellingShingle | Mansi Padave Sanchayeeta Borthakur Hansung B. Gim David Thilker Rolf A. Jansen Jacqueline Monkiewicz Robert C. Kennicutt Guinevere Kauffmann Andrew J. Fox Emmanuel Momjian Timothy Heckman DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies The Astrophysical Journal Spiral galaxies Disk galaxies Star formation Interstellar medium H I line emission Circumgalactic medium |
| title | DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies |
| title_full | DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies |
| title_fullStr | DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies |
| title_full_unstemmed | DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies |
| title_short | DIISC-III. Signatures of Stellar Disk Growth in Nearby Galaxies |
| title_sort | diisc iii signatures of stellar disk growth in nearby galaxies |
| topic | Spiral galaxies Disk galaxies Star formation Interstellar medium H I line emission Circumgalactic medium |
| url | https://doi.org/10.3847/1538-4357/ad029b |
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