Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization
We present an analysis of multiwavelength observations of the dark globule DC 314.8–5.1, using data from the Gaia optical, Two Micron All Star Survey near-infrared, and Wide-field Infrared Survey Explorer mid-infrared surveys, dedicated imaging with the Spitzer Space Telescope, and X-ray data obtain...
| 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/ad077a |
| _version_ | 1797404997207457792 |
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| author | E. Kosmaczewski Ł Stawarz C. C. Cheung A. Bamba A. Karska W. R. M. Rocha |
| author_facet | E. Kosmaczewski Ł Stawarz C. C. Cheung A. Bamba A. Karska W. R. M. Rocha |
| author_sort | E. Kosmaczewski |
| collection | DOAJ |
| description | We present an analysis of multiwavelength observations of the dark globule DC 314.8–5.1, using data from the Gaia optical, Two Micron All Star Survey near-infrared, and Wide-field Infrared Survey Explorer mid-infrared surveys, dedicated imaging with the Spitzer Space Telescope, and X-ray data obtained with the Swift X-Ray Telescope (XRT). The main goal was to identify possible pre-main-sequence stars (PMSs) and young stellar objects (YSOs) associated with the globule. For this, we studied the infrared colors of all point sources within the boundaries of the cloud. After removing sources with nonstellar spectra, we investigated the Gaia parallaxes for the YSO candidates and found that none are physically related to DC 314.8–5.1. In addition, we searched for X-ray emission from PMSs with Swift-XRT, and found no 0.5–10 keV emission down to a luminosity level ≲10 ^31 erg s ^−1 , typical of a PMS with mass ≥2 M _⊙ . Our detailed inspection therefore supports a very young, “prestellar core” evolutionary stage for the cloud. Based on archival Planck and IRAS data, we moreover identify the presence of hot dust, with temperatures ≳100 K, in addition to the dominant dust component at 14 K, originating with the associated reflection nebula. |
| first_indexed | 2024-03-09T03:03:13Z |
| format | Article |
| id | doaj.art-b6f6a0fc896f463c9b5e04af9259afde |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-09T03:03:13Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-b6f6a0fc896f463c9b5e04af9259afde2023-12-04T09:27:00ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195913710.3847/1538-4357/ad077aMultiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission CharacterizationE. Kosmaczewski0https://orcid.org/0000-0001-7150-4706Ł Stawarz1https://orcid.org/0000-0002-7263-7540C. C. Cheung2https://orcid.org/0000-0002-4377-0174A. Bamba3https://orcid.org/0000-0003-0890-4920A. Karska4https://orcid.org/0000-0001-8913-925XW. R. M. Rocha5https://orcid.org/0000-0001-6144-4113Astronomical Observatory of the Jagiellonian University , ul. Orla 171, 30-244 Kraków, Poland ; e.kosmaczewski@oa.uj.edu.plAstronomical Observatory of the Jagiellonian University , ul. Orla 171, 30-244 Kraków, Poland ; e.kosmaczewski@oa.uj.edu.plNaval Research Laboratory, Space Science Division , Washington, DC 20375, USADepartment of Physics, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Research Center for the Early Universe, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; Trans-Scale Quantum Science Institute, The University of Tokyo , Tokyo 113-0033, JapanMax-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121, Bonn, Germany; Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University , ul. Grudziadzka 5, 87-100 Toruń, PolandLaboratory for Astrophysics, Leiden Observatory, Leiden University , P.O. Box 9513, NL 2300 RA Leiden, The NetherlandsWe present an analysis of multiwavelength observations of the dark globule DC 314.8–5.1, using data from the Gaia optical, Two Micron All Star Survey near-infrared, and Wide-field Infrared Survey Explorer mid-infrared surveys, dedicated imaging with the Spitzer Space Telescope, and X-ray data obtained with the Swift X-Ray Telescope (XRT). The main goal was to identify possible pre-main-sequence stars (PMSs) and young stellar objects (YSOs) associated with the globule. For this, we studied the infrared colors of all point sources within the boundaries of the cloud. After removing sources with nonstellar spectra, we investigated the Gaia parallaxes for the YSO candidates and found that none are physically related to DC 314.8–5.1. In addition, we searched for X-ray emission from PMSs with Swift-XRT, and found no 0.5–10 keV emission down to a luminosity level ≲10 ^31 erg s ^−1 , typical of a PMS with mass ≥2 M _⊙ . Our detailed inspection therefore supports a very young, “prestellar core” evolutionary stage for the cloud. Based on archival Planck and IRAS data, we moreover identify the presence of hot dust, with temperatures ≳100 K, in addition to the dominant dust component at 14 K, originating with the associated reflection nebula.https://doi.org/10.3847/1538-4357/ad077aInterstellar mediumMolecular cloudsYoung stellar objectsPre-main sequence starsInfrared astronomyX-ray astronomy |
| spellingShingle | E. Kosmaczewski Ł Stawarz C. C. Cheung A. Bamba A. Karska W. R. M. Rocha Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization The Astrophysical Journal Interstellar medium Molecular clouds Young stellar objects Pre-main sequence stars Infrared astronomy X-ray astronomy |
| title | Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization |
| title_full | Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization |
| title_fullStr | Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization |
| title_full_unstemmed | Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization |
| title_short | Multiwavelength Study of Dark Globule DC 314.8–5.1: Point-source Identification and Diffuse Emission Characterization |
| title_sort | multiwavelength study of dark globule dc 314 8 5 1 point source identification and diffuse emission characterization |
| topic | Interstellar medium Molecular clouds Young stellar objects Pre-main sequence stars Infrared astronomy X-ray astronomy |
| url | https://doi.org/10.3847/1538-4357/ad077a |
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