A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function
This work presents and releases a catalog of new photometrically derived physical properties for the ∼10 ^5 most well-measured galaxies in the COSMOS field on the sky. Using a recently developed technique, spectral energy distributions are modeled assuming a stellar initial mass function (IMF) that...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | The Astrophysical Journal Supplement Series |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4365/acdde3 |
| _version_ | 1827828255982354432 |
|---|---|
| author | Vadim Rusakov Charles L. Steinhardt Albert Sneppen |
| author_facet | Vadim Rusakov Charles L. Steinhardt Albert Sneppen |
| author_sort | Vadim Rusakov |
| collection | DOAJ |
| description | This work presents and releases a catalog of new photometrically derived physical properties for the ∼10 ^5 most well-measured galaxies in the COSMOS field on the sky. Using a recently developed technique, spectral energy distributions are modeled assuming a stellar initial mass function (IMF) that depends on the temperature of gas in star-forming regions. The method is applied to the largest current sample of high-quality panchromatic photometry, the COSMOS2020 catalog, that allows for testing this assumption. It is found that the galaxies exhibit a continuum of IMF and gas temperatures, most of which are bottom-lighter than measured in the Milky Way. As a consequence, the stellar masses and star formation rates of most galaxies here are found to be lower than those measured by traditional techniques in the COSMOS2020 catalog by factors of ∼1.6–3.5 and 2.5–70.0, respectively, with the change being the strongest for the most active galaxies. The resulting physical properties provide new insights into variation of the IMF-derived gas temperature along the star-forming main sequence and at quiescence, produce a sharp and coherent picture of downsizing, as seen from the stellar mass functions, and hint at a possible high-temperature and high-density stage of early galactic evolution. |
| first_indexed | 2024-03-12T03:47:24Z |
| format | Article |
| id | doaj.art-4f606ac5f63643ddac5e54abc27368fb |
| institution | Directory Open Access Journal |
| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-12T03:47:24Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-4f606ac5f63643ddac5e54abc27368fb2023-09-03T12:42:10ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492023-01-0126811010.3847/1538-4365/acdde3A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass FunctionVadim Rusakov0https://orcid.org/0000-0001-7633-3985Charles L. Steinhardt1https://orcid.org/0000-0003-3780-6801Albert Sneppen2https://orcid.org/0000-0002-5460-6126Cosmic Dawn Center (DAWN) , Denmark ; rusakov124@gmail.com; Niels Bohr Institute, University of Copenhagen , Lyngbyvej 2, DK-2100 Copenhagen Ø, DenmarkCosmic Dawn Center (DAWN) , Denmark ; rusakov124@gmail.com; Niels Bohr Institute, University of Copenhagen , Lyngbyvej 2, DK-2100 Copenhagen Ø, DenmarkCosmic Dawn Center (DAWN) , Denmark ; rusakov124@gmail.com; Niels Bohr Institute, University of Copenhagen , Lyngbyvej 2, DK-2100 Copenhagen Ø, DenmarkThis work presents and releases a catalog of new photometrically derived physical properties for the ∼10 ^5 most well-measured galaxies in the COSMOS field on the sky. Using a recently developed technique, spectral energy distributions are modeled assuming a stellar initial mass function (IMF) that depends on the temperature of gas in star-forming regions. The method is applied to the largest current sample of high-quality panchromatic photometry, the COSMOS2020 catalog, that allows for testing this assumption. It is found that the galaxies exhibit a continuum of IMF and gas temperatures, most of which are bottom-lighter than measured in the Milky Way. As a consequence, the stellar masses and star formation rates of most galaxies here are found to be lower than those measured by traditional techniques in the COSMOS2020 catalog by factors of ∼1.6–3.5 and 2.5–70.0, respectively, with the change being the strongest for the most active galaxies. The resulting physical properties provide new insights into variation of the IMF-derived gas temperature along the star-forming main sequence and at quiescence, produce a sharp and coherent picture of downsizing, as seen from the stellar mass functions, and hint at a possible high-temperature and high-density stage of early galactic evolution.https://doi.org/10.3847/1538-4365/acdde3CatalogsInitial mass functionGalaxy evolutionGalaxy propertiesGalaxy massesHigh-redshift galaxies |
| spellingShingle | Vadim Rusakov Charles L. Steinhardt Albert Sneppen A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function The Astrophysical Journal Supplement Series Catalogs Initial mass function Galaxy evolution Galaxy properties Galaxy masses High-redshift galaxies |
| title | A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function |
| title_full | A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function |
| title_fullStr | A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function |
| title_full_unstemmed | A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function |
| title_short | A Value-added COSMOS2020 Catalog of Physical Properties: Constraining Temperature-dependent Initial Mass Function |
| title_sort | value added cosmos2020 catalog of physical properties constraining temperature dependent initial mass function |
| topic | Catalogs Initial mass function Galaxy evolution Galaxy properties Galaxy masses High-redshift galaxies |
| url | https://doi.org/10.3847/1538-4365/acdde3 |
| work_keys_str_mv | AT vadimrusakov avalueaddedcosmos2020catalogofphysicalpropertiesconstrainingtemperaturedependentinitialmassfunction AT charleslsteinhardt avalueaddedcosmos2020catalogofphysicalpropertiesconstrainingtemperaturedependentinitialmassfunction AT albertsneppen avalueaddedcosmos2020catalogofphysicalpropertiesconstrainingtemperaturedependentinitialmassfunction AT vadimrusakov valueaddedcosmos2020catalogofphysicalpropertiesconstrainingtemperaturedependentinitialmassfunction AT charleslsteinhardt valueaddedcosmos2020catalogofphysicalpropertiesconstrainingtemperaturedependentinitialmassfunction AT albertsneppen valueaddedcosmos2020catalogofphysicalpropertiesconstrainingtemperaturedependentinitialmassfunction |