Eintrag weiter verarbeiten
PG 1610+062: a runaway B star challenging classical ejection mechanisms
Gespeichert in:
| Zeitschriftentitel: | Astronomy & Astrophysics |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | Astronomy & Astrophysics, 628, 2019, S. L5 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
EDP Sciences
|
| Schlagwörter: |
| author_facet |
Irrgang, A. Geier, S. Heber, U. Kupfer, T. Fürst, F. Irrgang, A. Geier, S. Heber, U. Kupfer, T. Fürst, F. |
|---|---|
| author |
Irrgang, A. Geier, S. Heber, U. Kupfer, T. Fürst, F. |
| spellingShingle |
Irrgang, A. Geier, S. Heber, U. Kupfer, T. Fürst, F. Astronomy & Astrophysics PG 1610+062: a runaway B star challenging classical ejection mechanisms Space and Planetary Science Astronomy and Astrophysics |
| author_sort |
irrgang, a. |
| spelling |
Irrgang, A. Geier, S. Heber, U. Kupfer, T. Fürst, F. 0004-6361 1432-0746 EDP Sciences Space and Planetary Science Astronomy and Astrophysics http://dx.doi.org/10.1051/0004-6361/201935429 <jats:p>Hypervelocity stars are rare objects, mostly main-sequence (MS) B stars, traveling so fast that they will eventually escape from the Milky Way. Recently, it has been shown that the popular Hills mechanism, in which a binary system is disrupted via a close encounter with the supermassive black hole at the Galactic center, may not be their only ejection mechanism. The analyses of <jats:italic>Gaia</jats:italic> data ruled out a Galactic center origin for some of them, and instead indicated that they are extreme disk runaway stars ejected at velocities exceeding the predicted limits of classical scenarios (dynamical ejection from star clusters or binary supernova ejection). We present the discovery of a new extreme disk runaway star, PG 1610+062, which is a slowly pulsating B star bright enough to be studied in detail. A quantitative analysis of spectra taken with ESI at the Keck Observatory revealed that PG 1610+062 is a late B-type MS star of 4–5 <jats:italic>M</jats:italic><jats:sub>⊙</jats:sub> with low projected rotational velocity. Abundances (C, N, O, Ne, Mg, Al, Si, S, Ar, and Fe) were derived differentially with respect to the normal B star HD 137366 and indicate that PG 1610+062 is somewhat metal rich. A kinematic analysis, based on our spectrophotometric distance (17.3 kpc) and on proper motions from <jats:italic>Gaia</jats:italic>’s second data release, shows that PG 1610+062 was probably ejected from the Carina-Sagittarius spiral arm at a velocity of 550 ± 40 km s<jats:sup>−1</jats:sup>, which is beyond the classical limits. Accordingly, the star is in the top five of the most extreme MS disk runaway stars and is only the second among the five for which the chemical composition is known.</jats:p> PG 1610+062: a runaway B star challenging classical ejection mechanisms Astronomy & Astrophysics |
| doi_str_mv |
10.1051/0004-6361/201935429 |
| facet_avail |
Online Free |
| finc_class_facet |
Physik Technik |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA1MS8wMDA0LTYzNjEvMjAxOTM1NDI5 |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA1MS8wMDA0LTYzNjEvMjAxOTM1NDI5 |
| institution |
DE-Pl11 DE-Rs1 DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-Zwi2 DE-D161 DE-Gla1 DE-Zi4 DE-15 |
| imprint |
EDP Sciences, 2019 |
| imprint_str_mv |
EDP Sciences, 2019 |
| issn |
0004-6361 1432-0746 |
| issn_str_mv |
0004-6361 1432-0746 |
| language |
Undetermined |
| mega_collection |
EDP Sciences (CrossRef) |
| match_str |
irrgang2019pg1610062arunawaybstarchallengingclassicalejectionmechanisms |
| publishDateSort |
2019 |
| publisher |
EDP Sciences |
| recordtype |
ai |
| record_format |
ai |
| series |
Astronomy & Astrophysics |
| source_id |
49 |
| title |
PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_unstemmed |
PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_full |
PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_fullStr |
PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_full_unstemmed |
PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_short |
PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_sort |
pg 1610+062: a runaway b star challenging classical ejection mechanisms |
| topic |
Space and Planetary Science Astronomy and Astrophysics |
| url |
http://dx.doi.org/10.1051/0004-6361/201935429 |
| publishDate |
2019 |
| physical |
L5 |
| description |
<jats:p>Hypervelocity stars are rare objects, mostly main-sequence (MS) B stars, traveling so fast that they will eventually escape from the Milky Way. Recently, it has been shown that the popular Hills mechanism, in which a binary system is disrupted via a close encounter with the supermassive black hole at the Galactic center, may not be their only ejection mechanism. The analyses of <jats:italic>Gaia</jats:italic> data ruled out a Galactic center origin for some of them, and instead indicated that they are extreme disk runaway stars ejected at velocities exceeding the predicted limits of classical scenarios (dynamical ejection from star clusters or binary supernova ejection). We present the discovery of a new extreme disk runaway star, PG 1610+062, which is a slowly pulsating B star bright enough to be studied in detail. A quantitative analysis of spectra taken with ESI at the Keck Observatory revealed that PG 1610+062 is a late B-type MS star of 4–5 <jats:italic>M</jats:italic><jats:sub>⊙</jats:sub> with low projected rotational velocity. Abundances (C, N, O, Ne, Mg, Al, Si, S, Ar, and Fe) were derived differentially with respect to the normal B star HD 137366 and indicate that PG 1610+062 is somewhat metal rich. A kinematic analysis, based on our spectrophotometric distance (17.3 kpc) and on proper motions from <jats:italic>Gaia</jats:italic>’s second data release, shows that PG 1610+062 was probably ejected from the Carina-Sagittarius spiral arm at a velocity of 550 ± 40 km s<jats:sup>−1</jats:sup>, which is beyond the classical limits. Accordingly, the star is in the top five of the most extreme MS disk runaway stars and is only the second among the five for which the chemical composition is known.</jats:p> |
| container_start_page |
0 |
| container_title |
Astronomy & Astrophysics |
| container_volume |
628 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792343598717468672 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T16:54:13.797Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=PG+1610%2B062%3A+a+runaway+B+star+challenging+classical+ejection+mechanisms&rft.date=2019-08-01&genre=article&issn=1432-0746&volume=628&pages=L5&jtitle=Astronomy+%26+Astrophysics&atitle=PG+1610%2B062%3A+a+runaway+B+star+challenging+classical+ejection+mechanisms&aulast=F%C3%BCrst&aufirst=F.&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F201935429&rft.language%5B0%5D=und |
| SOLR | |
| _version_ | 1792343598717468672 |
| author | Irrgang, A., Geier, S., Heber, U., Kupfer, T., Fürst, F. |
| author_facet | Irrgang, A., Geier, S., Heber, U., Kupfer, T., Fürst, F., Irrgang, A., Geier, S., Heber, U., Kupfer, T., Fürst, F. |
| author_sort | irrgang, a. |
| container_start_page | 0 |
| container_title | Astronomy & Astrophysics |
| container_volume | 628 |
| description | <jats:p>Hypervelocity stars are rare objects, mostly main-sequence (MS) B stars, traveling so fast that they will eventually escape from the Milky Way. Recently, it has been shown that the popular Hills mechanism, in which a binary system is disrupted via a close encounter with the supermassive black hole at the Galactic center, may not be their only ejection mechanism. The analyses of <jats:italic>Gaia</jats:italic> data ruled out a Galactic center origin for some of them, and instead indicated that they are extreme disk runaway stars ejected at velocities exceeding the predicted limits of classical scenarios (dynamical ejection from star clusters or binary supernova ejection). We present the discovery of a new extreme disk runaway star, PG 1610+062, which is a slowly pulsating B star bright enough to be studied in detail. A quantitative analysis of spectra taken with ESI at the Keck Observatory revealed that PG 1610+062 is a late B-type MS star of 4–5 <jats:italic>M</jats:italic><jats:sub>⊙</jats:sub> with low projected rotational velocity. Abundances (C, N, O, Ne, Mg, Al, Si, S, Ar, and Fe) were derived differentially with respect to the normal B star HD 137366 and indicate that PG 1610+062 is somewhat metal rich. A kinematic analysis, based on our spectrophotometric distance (17.3 kpc) and on proper motions from <jats:italic>Gaia</jats:italic>’s second data release, shows that PG 1610+062 was probably ejected from the Carina-Sagittarius spiral arm at a velocity of 550 ± 40 km s<jats:sup>−1</jats:sup>, which is beyond the classical limits. Accordingly, the star is in the top five of the most extreme MS disk runaway stars and is only the second among the five for which the chemical composition is known.</jats:p> |
| doi_str_mv | 10.1051/0004-6361/201935429 |
| facet_avail | Online, Free |
| finc_class_facet | Physik, Technik |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA1MS8wMDA0LTYzNjEvMjAxOTM1NDI5 |
| imprint | EDP Sciences, 2019 |
| imprint_str_mv | EDP Sciences, 2019 |
| institution | DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15 |
| issn | 0004-6361, 1432-0746 |
| issn_str_mv | 0004-6361, 1432-0746 |
| language | Undetermined |
| last_indexed | 2024-03-01T16:54:13.797Z |
| match_str | irrgang2019pg1610062arunawaybstarchallengingclassicalejectionmechanisms |
| mega_collection | EDP Sciences (CrossRef) |
| physical | L5 |
| publishDate | 2019 |
| publishDateSort | 2019 |
| publisher | EDP Sciences |
| record_format | ai |
| recordtype | ai |
| series | Astronomy & Astrophysics |
| source_id | 49 |
| spelling | Irrgang, A. Geier, S. Heber, U. Kupfer, T. Fürst, F. 0004-6361 1432-0746 EDP Sciences Space and Planetary Science Astronomy and Astrophysics http://dx.doi.org/10.1051/0004-6361/201935429 <jats:p>Hypervelocity stars are rare objects, mostly main-sequence (MS) B stars, traveling so fast that they will eventually escape from the Milky Way. Recently, it has been shown that the popular Hills mechanism, in which a binary system is disrupted via a close encounter with the supermassive black hole at the Galactic center, may not be their only ejection mechanism. The analyses of <jats:italic>Gaia</jats:italic> data ruled out a Galactic center origin for some of them, and instead indicated that they are extreme disk runaway stars ejected at velocities exceeding the predicted limits of classical scenarios (dynamical ejection from star clusters or binary supernova ejection). We present the discovery of a new extreme disk runaway star, PG 1610+062, which is a slowly pulsating B star bright enough to be studied in detail. A quantitative analysis of spectra taken with ESI at the Keck Observatory revealed that PG 1610+062 is a late B-type MS star of 4–5 <jats:italic>M</jats:italic><jats:sub>⊙</jats:sub> with low projected rotational velocity. Abundances (C, N, O, Ne, Mg, Al, Si, S, Ar, and Fe) were derived differentially with respect to the normal B star HD 137366 and indicate that PG 1610+062 is somewhat metal rich. A kinematic analysis, based on our spectrophotometric distance (17.3 kpc) and on proper motions from <jats:italic>Gaia</jats:italic>’s second data release, shows that PG 1610+062 was probably ejected from the Carina-Sagittarius spiral arm at a velocity of 550 ± 40 km s<jats:sup>−1</jats:sup>, which is beyond the classical limits. Accordingly, the star is in the top five of the most extreme MS disk runaway stars and is only the second among the five for which the chemical composition is known.</jats:p> PG 1610+062: a runaway B star challenging classical ejection mechanisms Astronomy & Astrophysics |
| spellingShingle | Irrgang, A., Geier, S., Heber, U., Kupfer, T., Fürst, F., Astronomy & Astrophysics, PG 1610+062: a runaway B star challenging classical ejection mechanisms, Space and Planetary Science, Astronomy and Astrophysics |
| title | PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_full | PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_fullStr | PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_full_unstemmed | PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_short | PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| title_sort | pg 1610+062: a runaway b star challenging classical ejection mechanisms |
| title_unstemmed | PG 1610+062: a runaway B star challenging classical ejection mechanisms |
| topic | Space and Planetary Science, Astronomy and Astrophysics |
| url | http://dx.doi.org/10.1051/0004-6361/201935429 |