Ongoing astrometric microlensing events of two nearby stars
<i>Context<i/>. Astrometric microlensing is an excellent tool to determine the mass of stellar objects. By measuring the astrometric shift of a background source star in combination with precise predictions of its unlensed position and of the lens position, gravitational lensing allows t...
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Dokumenttyp: | Article (Journal) Editorial |
| Sprache: | Englisch |
| Veröffentlicht: |
20 July 2018
|
| In: |
Astronomy and astrophysics
Year: 2018, Jahrgang: 615 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201833461 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1051/0004-6361/201833461 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2018/07/aa33461-18/aa33461-18.html 
|
| Verfasserangaben: | J. Klüter, U. Bastian, M. Demleitner, and J. Wambsganss |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1578040787 | ||
| 003 | DE-627 | ||
| 005 | 20220814203036.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 180730s2018 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1051/0004-6361/201833461 |2 doi | |
| 035 | |a (DE-627)1578040787 | ||
| 035 | |a (DE-576)508040787 | ||
| 035 | |a (DE-599)BSZ508040787 | ||
| 035 | |a (OCoLC)1341014672 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Klüter, Jonas |d 1991- |e VerfasserIn |0 (DE-588)1132209218 |0 (DE-627)887560989 |0 (DE-576)481182799 |4 aut | |
| 245 | 1 | 0 | |a Ongoing astrometric microlensing events of two nearby stars |c J. Klüter, U. Bastian, M. Demleitner, and J. Wambsganss |
| 264 | 1 | |c 20 July 2018 | |
| 300 | |a 4 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 30.07.2018 | ||
| 520 | |a <i>Context<i/>. Astrometric microlensing is an excellent tool to determine the mass of stellar objects. By measuring the astrometric shift of a background source star in combination with precise predictions of its unlensed position and of the lens position, gravitational lensing allows to one determine the mass of the lensing star with a precision of 1%, independently of any prior knowledge.<i>Aims<i/>. Making use of the recently published <i>Gaia<i/> Data Release 2 (<i>Gaia<i/> DR2) we predict astrometric microlensing events by fore-ground stars of high proper motion passing by a background star in the coming years.<i>Methods<i/>. We compile a list of approximately 148 000 high-proper-motion stars within <i>Gaia<i/> DR2 with <i>µ<i/><sub>tot<sub/> > 150 mas yr<sup>−1<sup/>. We then search for background stars close to their paths and calculate the dates and separations of the closest approaches. Using color and absolute magnitude, we determine approximate masses of the lenses. Finally, we calculate the expected astrometric shifts and magnifications of the predicted events.<i>Results<i/>. We detect two ongoing microlensing events by the high-proper-motion stars Luyten 143-23 and Ross 322 and predict closest separations of (108.5 ± 1.4) mas in July 2018 and (125.3 ± 3.4) mas in August 2018, respectively. The respective expected astrometric shifts are (1.74 ± 0.12) mas and (0.76 ± 0.06) mas. Furthermore, Luyten 143-23 will pass by another star in March 2021 with a closest separation of (280.1 ± 1.1) mas, which results in an expected shift of (0.69 ± 0.05) mas. | ||
| 700 | 1 | |a Bastian, Ulrich |e VerfasserIn |0 (DE-588)102074135X |0 (DE-627)69133014X |0 (DE-576)361918682 |4 aut | |
| 700 | 1 | |a Demleitner, Markus |e VerfasserIn |0 (DE-588)1019723211 |0 (DE-627)69100661X |0 (DE-576)358628644 |4 aut | |
| 700 | 1 | |a Wambsganß, Joachim |d 1961- |e VerfasserIn |0 (DE-588)122246861 |0 (DE-627)081826931 |0 (DE-576)293172137 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Astronomy and astrophysics |d Les Ulis : EDP Sciences, 1969 |g 615(2018) Artikel-Nummer L11, 4 Seiten |h Online-Ressource |w (DE-627)253390222 |w (DE-600)1458466-9 |w (DE-576)072283351 |x 1432-0746 |7 nnas |a Ongoing astrometric microlensing events of two nearby stars |
| 773 | 1 | 8 | |g volume:615 |g year:2018 |g extent:4 |a Ongoing astrometric microlensing events of two nearby stars |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1051/0004-6361/201833461 |x Verlag |x Resolving-System |z kostenfrei |3 Volltext |
| 856 | 4 | 0 | |u https://www.aanda.org/articles/aa/abs/2018/07/aa33461-18/aa33461-18.html |x Verlag |x Resolving-System |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20180730 | ||
| 993 | |a Editorial | ||
| 994 | |a 2018 | ||
| 998 | |g 122246861 |a Wambsganß, Joachim |m 122246861:Wambsganß, Joachim |d 700000 |d 714000 |d 714100 |e 700000PW122246861 |e 714000PW122246861 |e 714100PW122246861 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 4 |y j | ||
| 998 | |g 1019723211 |a Demleitner, Markus |m 1019723211:Demleitner, Markus |d 700000 |d 714000 |d 714100 |e 700000PD1019723211 |e 714000PD1019723211 |e 714100PD1019723211 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 3 | ||
| 998 | |g 102074135X |a Bastian, Ulrich |m 102074135X:Bastian, Ulrich |d 700000 |d 714000 |d 714100 |e 700000PB102074135X |e 714000PB102074135X |e 714100PB102074135X |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 2 | ||
| 998 | |g 1132209218 |a Klüter, Jonas |m 1132209218:Klüter, Jonas |d 700000 |d 714000 |d 714100 |e 700000PK1132209218 |e 714000PK1132209218 |e 714100PK1132209218 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 1 |x j | ||
| 999 | |a KXP-PPN1578040787 |e 3019703972 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"origin":[{"dateIssuedKey":"2018","dateIssuedDisp":"20 July 2018"}],"note":["Gesehen am 30.07.2018"],"recId":"1578040787","relHost":[{"id":{"issn":["1432-0746"],"eki":["253390222"],"zdb":["1458466-9"]},"language":["eng"],"name":{"displayForm":["European Southern Observatory (ESO)"]},"recId":"253390222","origin":[{"publisherPlace":"Les Ulis ; Berlin ; Heidelberg","publisher":"EDP Sciences ; Springer","dateIssuedDisp":"1969-","dateIssuedKey":"1969"}],"note":["Gesehen am 21.06.2024","Erscheint 36mal jährlich in 12 Bänden zu je 3 Ausgaben","Fortsetzung der Druck-Ausgabe"],"pubHistory":["1.1969 -"],"title":[{"subtitle":"an international weekly journal","title_sort":"Astronomy and astrophysics","title":"Astronomy and astrophysics"}],"part":{"extent":"4","volume":"615","text":"615(2018) Artikel-Nummer L11, 4 Seiten","year":"2018"},"physDesc":[{"extent":"Online-Ressource"}],"disp":"Ongoing astrometric microlensing events of two nearby starsAstronomy and astrophysics","type":{"bibl":"periodical","media":"Online-Ressource"},"titleAlt":[{"title":"Astronomy & astrophysics"},{"title":"a European journal"}],"corporate":[{"role":"isb","display":"European Southern Observatory"}]}],"type":{"bibl":"article-journal","media":"Online-Ressource"},"name":{"displayForm":["J. Klüter, U. Bastian, M. Demleitner, and J. Wambsganss"]},"language":["eng"],"person":[{"role":"aut","display":"Klüter, Jonas","given":"Jonas","family":"Klüter"},{"family":"Bastian","given":"Ulrich","display":"Bastian, Ulrich","role":"aut"},{"role":"aut","given":"Markus","display":"Demleitner, Markus","family":"Demleitner"},{"role":"aut","display":"Wambsganß, Joachim","given":"Joachim","family":"Wambsganß"}],"title":[{"title":"Ongoing astrometric microlensing events of two nearby stars","title_sort":"Ongoing astrometric microlensing events of two nearby stars"}],"id":{"eki":["1578040787"],"doi":["10.1051/0004-6361/201833461"]},"physDesc":[{"extent":"4 S."}]} | ||
| SRT | |a KLUETERJONONGOINGAST2020 | ||