X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission
We present the results of X-ray and Near-Infrared observations of the Galactic Ridge X-ray Emission (GRXE). We extracted 2,002 X-ray point sources in the <em>Chandra</em> Bulge Field (l =0°.113, b = 1°.424) down to ~10<sup>-14.8</sup> ergscm<sup>-2</sup>s<sup&g...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Czech Technical University in Prague
2014-12-01
|
| Series: | Acta Polytechnica CTU Proceedings |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/2393 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849413745411883008 |
|---|---|
| author | Kumiko Morihana Masahiro Tsujimoto Ken Ebisawa |
| author_facet | Kumiko Morihana Masahiro Tsujimoto Ken Ebisawa |
| author_sort | Kumiko Morihana |
| collection | DOAJ |
| description | We present the results of X-ray and Near-Infrared observations of the Galactic Ridge X-ray Emission (GRXE). We extracted 2,002 X-ray point sources in the <em>Chandra</em> Bulge Field (l =0°.113, b = 1°.424) down to ~10<sup>-14.8</sup> ergscm<sup>-2</sup>s<sup>-1</sup> in 2-8 keV band with the longest observation (900 ks) of the GRXE. Based on X-ray brightness and hardness, we classied the X-ray point sources into three groups: A (hard), B (soft and broad spectrum), and C (soft and peaked spectrum). In order to know populations of the X-ray point sources, we carried out NIR imaging and spectroscopy observation. We identied 11% of X-ray point sources with NIR and extracted NIR spectra for some of them. Based on X-ray and NIR properties, we concluded that non-thermal sources in the group A are mostly active galactic nuclei and the thermal sources are mostly white dwarf binaries such as cataclysmic variables (CVs) and Pre-CVs. We concluded that the group B and C sources are X-ray active stars in flare and quiescence, respectively. |
| format | Article |
| id | doaj-art-827fa40b194e4093b47b48ddfb62de31 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2014-12-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-827fa40b194e4093b47b48ddfb62de312025-08-20T03:34:03ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822014-12-011122222610.14311/APP.2014.01.02222205X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray EmissionKumiko Morihana0Masahiro Tsujimoto1Ken Ebisawa2Nishiharima Astronomical Observatory, Center for Astronomy, University of Hyogo, 407-2 Nishigaichi, Sayo-cho, Sayo- gun, Hyogo, 679-5313, JapanJapan Astrospace Exporation Agency, Institute of Space and Astronautical Science, 3-1-1 Yoshino-dai, Chuo-ku, Sagami- hara, Kanagawa 252-5210, JapanJapan Astrospace Exporation Agency, Institute of Space and Astronautical Science, 3-1-1 Yoshino-dai, Chuo-ku, Sagami- hara, Kanagawa 252-5210, JapanWe present the results of X-ray and Near-Infrared observations of the Galactic Ridge X-ray Emission (GRXE). We extracted 2,002 X-ray point sources in the <em>Chandra</em> Bulge Field (l =0°.113, b = 1°.424) down to ~10<sup>-14.8</sup> ergscm<sup>-2</sup>s<sup>-1</sup> in 2-8 keV band with the longest observation (900 ks) of the GRXE. Based on X-ray brightness and hardness, we classied the X-ray point sources into three groups: A (hard), B (soft and broad spectrum), and C (soft and peaked spectrum). In order to know populations of the X-ray point sources, we carried out NIR imaging and spectroscopy observation. We identied 11% of X-ray point sources with NIR and extracted NIR spectra for some of them. Based on X-ray and NIR properties, we concluded that non-thermal sources in the group A are mostly active galactic nuclei and the thermal sources are mostly white dwarf binaries such as cataclysmic variables (CVs) and Pre-CVs. We concluded that the group B and C sources are X-ray active stars in flare and quiescence, respectively.https://ojs.cvut.cz/ojs/index.php/APP/article/view/2393 |
| spellingShingle | Kumiko Morihana Masahiro Tsujimoto Ken Ebisawa X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission Acta Polytechnica CTU Proceedings |
| title | X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission |
| title_full | X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission |
| title_fullStr | X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission |
| title_full_unstemmed | X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission |
| title_short | X-Ray and Near-Infrared Spectroscopy of Dim X-Ray Point Sources Constituting the Galactic Ridge X-Ray Emission |
| title_sort | x ray and near infrared spectroscopy of dim x ray point sources constituting the galactic ridge x ray emission |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/2393 |
| work_keys_str_mv | AT kumikomorihana xrayandnearinfraredspectroscopyofdimxraypointsourcesconstitutingthegalacticridgexrayemission AT masahirotsujimoto xrayandnearinfraredspectroscopyofdimxraypointsourcesconstitutingthegalacticridgexrayemission AT kenebisawa xrayandnearinfraredspectroscopyofdimxraypointsourcesconstitutingthegalacticridgexrayemission |