The progenitor set of present-day early-type galaxies
We present a comprehensive theoretical study, within a fully realistic semi-analytical framework, of the photometric properties of early-type progenitors in the redshift range 0<z<1, as a function of the luminosity and local environment of the early-type remnant at present-day. We find that, a...
| Main Authors: | , , , , |
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| Format: | Internet publication |
| Language: | English |
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2006
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| _version_ | 1797111673568362496 |
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| author | Kaviraj, S Devriendt, J Ferreras, i Yi, SK Silk, J |
| author_facet | Kaviraj, S Devriendt, J Ferreras, i Yi, SK Silk, J |
| author_sort | Kaviraj, S |
| collection | OXFORD |
| description | We present a comprehensive theoretical study, within a fully realistic semi-analytical framework, of the photometric properties of early-type progenitors in the redshift range 0<z<1, as a function of the luminosity and local environment of the early-type remnant at present-day. We find that, averaging across all environments at z~1, less than 50 percent of the stellar mass which ends up in early-types today is actually in early-type progenitors at this redshift. The corresponding value is ~65 percent in clusters due to faster morphological transformations in the such dense environments. We develop probabilistic prescriptions which provide a means of including spiral (i.e. non early-type) progenitors at intermediate and high redshifts, based on their luminosity and optical (BVK) colours. For example, at intermediate redshifts (z~0.5), large (M_B<-21.5), red (B-V>0.7) spirals have ~75-95 percent chance of being a progenitor, while the corresponding probability for large blue spirals (M_B<-21.5, B-V<0.7) is ~50-75 percent. Finally, we explore the correspondence between the true progenitor set of present-day early-types and the commonly used `red-sequence', defined as the set of galaxies within the part of the colour-magnitude space which is dominated by early-type objects. While large members (M_V<-22) of the `red sequence' trace the progenitor set accurately in terms of numbers and mass, the relationship breaks down severely at fainter luminosities (M_V>-21). Hence the red sequence is generally not a good proxy for the progenitor set of early-type galaxies. |
| first_indexed | 2024-03-07T08:12:13Z |
| format | Internet publication |
| id | oxford-uuid:24fbd0e0-cc4e-446c-9273-9ad64be03989 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:12:13Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:24fbd0e0-cc4e-446c-9273-9ad64be039892023-12-07T10:40:52ZThe progenitor set of present-day early-type galaxiesInternet publicationhttp://purl.org/coar/resource_type/c_7ad9uuid:24fbd0e0-cc4e-446c-9273-9ad64be03989EnglishSymplectic Elements at Oxford2006Kaviraj, SDevriendt, JFerreras, iYi, SKSilk, JWe present a comprehensive theoretical study, within a fully realistic semi-analytical framework, of the photometric properties of early-type progenitors in the redshift range 0<z<1, as a function of the luminosity and local environment of the early-type remnant at present-day. We find that, averaging across all environments at z~1, less than 50 percent of the stellar mass which ends up in early-types today is actually in early-type progenitors at this redshift. The corresponding value is ~65 percent in clusters due to faster morphological transformations in the such dense environments. We develop probabilistic prescriptions which provide a means of including spiral (i.e. non early-type) progenitors at intermediate and high redshifts, based on their luminosity and optical (BVK) colours. For example, at intermediate redshifts (z~0.5), large (M_B<-21.5), red (B-V>0.7) spirals have ~75-95 percent chance of being a progenitor, while the corresponding probability for large blue spirals (M_B<-21.5, B-V<0.7) is ~50-75 percent. Finally, we explore the correspondence between the true progenitor set of present-day early-types and the commonly used `red-sequence', defined as the set of galaxies within the part of the colour-magnitude space which is dominated by early-type objects. While large members (M_V<-22) of the `red sequence' trace the progenitor set accurately in terms of numbers and mass, the relationship breaks down severely at fainter luminosities (M_V>-21). Hence the red sequence is generally not a good proxy for the progenitor set of early-type galaxies. |
| spellingShingle | Kaviraj, S Devriendt, J Ferreras, i Yi, SK Silk, J The progenitor set of present-day early-type galaxies |
| title | The progenitor set of present-day early-type galaxies |
| title_full | The progenitor set of present-day early-type galaxies |
| title_fullStr | The progenitor set of present-day early-type galaxies |
| title_full_unstemmed | The progenitor set of present-day early-type galaxies |
| title_short | The progenitor set of present-day early-type galaxies |
| title_sort | progenitor set of present day early type galaxies |
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