K-band Spectroscopy of Clusters in NGC 4038/4039
Integral field spectroscopy in the K-band (1.9-2.4um) was performed on four IR-bright star clusters and the two nuclei in NGC 4038/4039 (``The Antennae''). Two of the clusters are located in the overlap region of the two galaxies, and together comprise ~25% of the total 15um and ~10% of th...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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Institute of Physics Publishing
2000
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| _version_ | 1826283966326374400 |
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| author | Mengel, S Lehnert, MD Thatte, N Tacconi-Garman, L Genzel, R |
| author_facet | Mengel, S Lehnert, MD Thatte, N Tacconi-Garman, L Genzel, R |
| author_sort | Mengel, S |
| collection | OXFORD |
| description | Integral field spectroscopy in the K-band (1.9-2.4um) was performed on four IR-bright star clusters and the two nuclei in NGC 4038/4039 (``The Antennae''). Two of the clusters are located in the overlap region of the two galaxies, and together comprise ~25% of the total 15um and ~10% of the total 4.8 GHz emission from this pair of merging galaxies. The other two clusters, each of them spatially resolved into two components, are located in the northern galaxy, one in the western and one in the eastern loop of blue clusters. Comparing our analysis of Brgamma, CO band-heads, He I (2.058um), Halpha (from archival HST data), and V-K colors with stellar population synthesis models indicates that the clusters are extincted (A_V ~ 0.7 - 4.3 mags) and young, displaying a significant age spread (4-13 Myrs). The starbursts in the nuclei are much older (65 Myrs), with the nucleus of NGC 4038 displaying a region of recent star formation northward of its K-band peak. Using our derived age estimates and assuming the parameters of the IMF (Salpeter slope, upper mass cut-off of 100 M_sun, Miller-Scalo between 1 M_sun and 0.1 M_sun), we find that the clusters have masses between 0.5 and 5 * 10^6M_sun. |
| first_indexed | 2024-03-07T01:06:46Z |
| format | Journal article |
| id | oxford-uuid:8b9cb7f2-d354-4883-8039-b56937891758 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:06:46Z |
| publishDate | 2000 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:8b9cb7f2-d354-4883-8039-b569378917582022-03-26T22:39:08ZK-band Spectroscopy of Clusters in NGC 4038/4039Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8b9cb7f2-d354-4883-8039-b56937891758EnglishSymplectic Elements at OxfordInstitute of Physics Publishing2000Mengel, SLehnert, MDThatte, NTacconi-Garman, LGenzel, RIntegral field spectroscopy in the K-band (1.9-2.4um) was performed on four IR-bright star clusters and the two nuclei in NGC 4038/4039 (``The Antennae''). Two of the clusters are located in the overlap region of the two galaxies, and together comprise ~25% of the total 15um and ~10% of the total 4.8 GHz emission from this pair of merging galaxies. The other two clusters, each of them spatially resolved into two components, are located in the northern galaxy, one in the western and one in the eastern loop of blue clusters. Comparing our analysis of Brgamma, CO band-heads, He I (2.058um), Halpha (from archival HST data), and V-K colors with stellar population synthesis models indicates that the clusters are extincted (A_V ~ 0.7 - 4.3 mags) and young, displaying a significant age spread (4-13 Myrs). The starbursts in the nuclei are much older (65 Myrs), with the nucleus of NGC 4038 displaying a region of recent star formation northward of its K-band peak. Using our derived age estimates and assuming the parameters of the IMF (Salpeter slope, upper mass cut-off of 100 M_sun, Miller-Scalo between 1 M_sun and 0.1 M_sun), we find that the clusters have masses between 0.5 and 5 * 10^6M_sun. |
| spellingShingle | Mengel, S Lehnert, MD Thatte, N Tacconi-Garman, L Genzel, R K-band Spectroscopy of Clusters in NGC 4038/4039 |
| title | K-band Spectroscopy of Clusters in NGC 4038/4039 |
| title_full | K-band Spectroscopy of Clusters in NGC 4038/4039 |
| title_fullStr | K-band Spectroscopy of Clusters in NGC 4038/4039 |
| title_full_unstemmed | K-band Spectroscopy of Clusters in NGC 4038/4039 |
| title_short | K-band Spectroscopy of Clusters in NGC 4038/4039 |
| title_sort | k band spectroscopy of clusters in ngc 4038 4039 |
| work_keys_str_mv | AT mengels kbandspectroscopyofclustersinngc40384039 AT lehnertmd kbandspectroscopyofclustersinngc40384039 AT thatten kbandspectroscopyofclustersinngc40384039 AT tacconigarmanl kbandspectroscopyofclustersinngc40384039 AT genzelr kbandspectroscopyofclustersinngc40384039 |