The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7
Using photometric and spectroscopic observations of the double-lined early-type eclipsingbinary system ALS 1135, a member of the distant OB association Bochum 7, we derived thenew physical and orbital parameters of its components. The masses of both components werederived with an accuracy better tha...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Oxford University Press
2013
|
| Subjects: | |
| Online Access: | http://mnras.oxfordjournals.org/content/429/2/1354.full.pdf+html http://hdl.handle.net/20.500.11937/47819 |
| _version_ | 1848757939840483328 |
|---|---|
| author | Michalska, G. Niemczura, E. Pigulski, A. Steslicki, M. Williams, Andrew |
| author_facet | Michalska, G. Niemczura, E. Pigulski, A. Steslicki, M. Williams, Andrew |
| author_sort | Michalska, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Using photometric and spectroscopic observations of the double-lined early-type eclipsingbinary system ALS 1135, a member of the distant OB association Bochum 7, we derived thenew physical and orbital parameters of its components. The masses of both components werederived with an accuracy better than 1 per cent, and their radii, with an accuracy better than3 per cent. Since the primary’s mass is equal to about 25M, its radius was subsequentlyused to derive the age of the system which is equal to 4.3 ± 0.5Myr. The result shows thatthis method represents a viable alternative to isochrone fitting.A photometric search of the field of ALS 1135 resulted in the discovery of 17 variable stars,including 7 pulsating ones. One of them is a slowly-pulsating B (SPB) star belonging to VelOB1, the other six are d Scuti stars. Of the six d Scuti stars three might belong to Vel OB1, theother two are likely members of Bochum 7. Given the age of Bochum 7, these two stars areprobably pre-main-sequence pulsators. In addition, we provide UBVIC photometry for about600 stars in the observed field. |
| first_indexed | 2025-11-14T09:36:04Z |
| format | Journal Article |
| id | curtin-20.500.11937-47819 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:36:04Z |
| publishDate | 2013 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-478192017-02-28T01:39:59Z The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 Michalska, G. Niemczura, E. Pigulski, A. Steslicki, M. Williams, Andrew open clusters and associations individual stars early-type – open clusters and associations Vel OB1 Bochum 7 Using photometric and spectroscopic observations of the double-lined early-type eclipsingbinary system ALS 1135, a member of the distant OB association Bochum 7, we derived thenew physical and orbital parameters of its components. The masses of both components werederived with an accuracy better than 1 per cent, and their radii, with an accuracy better than3 per cent. Since the primary’s mass is equal to about 25M, its radius was subsequentlyused to derive the age of the system which is equal to 4.3 ± 0.5Myr. The result shows thatthis method represents a viable alternative to isochrone fitting.A photometric search of the field of ALS 1135 resulted in the discovery of 17 variable stars,including 7 pulsating ones. One of them is a slowly-pulsating B (SPB) star belonging to VelOB1, the other six are d Scuti stars. Of the six d Scuti stars three might belong to Vel OB1, theother two are likely members of Bochum 7. Given the age of Bochum 7, these two stars areprobably pre-main-sequence pulsators. In addition, we provide UBVIC photometry for about600 stars in the observed field. 2013 Journal Article http://hdl.handle.net/20.500.11937/47819 http://mnras.oxfordjournals.org/content/429/2/1354.full.pdf+html Oxford University Press restricted |
| spellingShingle | open clusters and associations individual stars early-type – open clusters and associations Vel OB1 Bochum 7 Michalska, G. Niemczura, E. Pigulski, A. Steslicki, M. Williams, Andrew The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 |
| title | The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 |
| title_full | The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 |
| title_fullStr | The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 |
| title_full_unstemmed | The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 |
| title_short | The massive eclipsing system ALS 1135 and variable stars in the field of the distant OB association Bochum 7 |
| title_sort | massive eclipsing system als 1135 and variable stars in the field of the distant ob association bochum 7 |
| topic | open clusters and associations individual stars early-type – open clusters and associations Vel OB1 Bochum 7 |
| url | http://mnras.oxfordjournals.org/content/429/2/1354.full.pdf+html http://hdl.handle.net/20.500.11937/47819 |