2018A&A...620A.175K

Query : 2018A&A...620A.175K

2018A&A...620A.175K - Astronomy and Astrophysics, volume 620A175-175 (2018/12-1)

Prediction of astrometric microlensing events from Gaia DR2 proper motions.

KLUTER J., BASTIAN U., DEMLEITNER M. and WAMBSGANSS J.

Abstract (from CDS):


Context. Astrometric gravitational microlensing is an excellent tool to determine the mass of stellar objects. Using precise astrometric measurements of the lensed position of a background source in combination with accurate predictions of the positions of the lens and the unlensed source it is possible to determine the mass of the lens with an accuracy of a few percent.
Aims. Making use of the recently published Gaia Data Release 2 (DR2) catalogue, we want to predict astrometric microlensing events caused by foreground stars with high proper motion passing a background source in the coming decades.
Results. We selected roughly 148 000 high-proper-motion stars from Gaia DR2 with µtot>150mas/yr as potential lenses. We then searched for background sources close to their paths. Using the astrometric parameters of Gaia DR2, we calculated the future positions of source and lens. With a nested-intervals algorithm we determined the date and separation of the closest approach. Using Gaia DR2 photometry we determined an approximate mass of the lens, which we used to calculate the expected microlensing effects.
Conclusions. We predict 3914 microlensing events caused by 2875 different lenses between 2010 and 2065, with expected shifts larger than 0.1 mas between the lensed and unlensed positions of the source. Of those, 513 events are expected to happen between 2014.5 and 2026.5 and might be measured by Gaia. For 127 events we also expect a magnification between 1mmag and 3mag.

Abstract Copyright: © ESO 2018

Journal keyword(s): astrometry - catalogs - proper motions - gravitational lensing: micro - methods: data analysis

Simbad objects: 66

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Number of rows : 66
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Gaia DR3 428051391503714432 WD* 00 30 51.6320962279 +59 11 16.177538049           DA: 6 0
2 Gaia DR3 428051391509474816 * 00 30 53.2364890488 +59 11 20.788902924           ~ 1 0
3 Ross 322 PM* 01 07 47.8417363419 +34 12 30.544309449   14.94 13.35 12.2   M2.5V 32 0
4 OGLE SMC115.5 319 WD* 01 11 03.6684911571 -72 27 41.258331835     18.232   17.432 DC: 9 0
5 Gaia DR3 4687445599404851456 * 01 11 04.9782004080 -72 27 44.838374328           ~ 1 0
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
7 Gaia DR2 4733794485572154624 * 03 12 15.9249322224 -55 13 54.219233352           ~ 1 0
8 Gaia DR3 4733794485572154752 * 03 12 15.9249322231 -55 13 54.219233357           ~ 2 0
9 Gaia DR2 478978296204261248 * 04 56 19.8177966336 +64 09 21.959013672           ~ 1 0
10 Gaia DR3 478978296205513088 * 04 56 19.8177966340 +64 09 21.959013685           ~ 5 0
11 HD 33793 PM* 05 11 40.5898395497 -45 01 06.361734876 11.624 10.433 8.853 7.9 6.899 M1VIp 367 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
13 Gaia DR3 5556349476589422336 WD? 06 27 07.2247726731 -45 54 20.124509563           ~ 3 0
14 Gaia DR3 5556349472293892224 * 06 27 08.3620317816 -45 54 02.204840052           ~ 1 0
15 G 109-35 PM* 06 59 28.8164986147 +19 20 55.857870053   16.78   10.6   M5.0Ve 98 0
16 Gaia DR3 3365062964671171712 * 06 59 31.7832631920 +19 20 15.255715956           ~ 1 0
17 PM J07228-3042 WD* 07 22 51.3793277526 -30 42 34.378614303   18.3   17.4 17.2 DA 12 0
18 UCAC4 297-020813 * 07 22 52.5388389000 -30 42 18.188562600   15.530 14.189 13.902   ~ 1 0
19 Gaia DR3 5715906236031079040 * 07 49 59.1082329768 -19 00 59.774083596           ~ 1 0
20 Gaia DR3 5715906236031073280 WD* 07 49 59.5486814272 -19 01 04.844597476           DA 5 0
21 Gaia DR3 5243594253068231168 * 09 42 45.7581679176 -68 52 00.633503028           ~ 1 0
22 L 100-115 PM* 09 42 46.3429551119 -68 53 06.008938214   14.51 12.78 11.35 9.61 M4.0V 64 0
23 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
24 Gaia DR3 5332606277747043456 * 11 46 00.0097563936 -64 50 43.533720672           ~ 1 0
25 HD 103095 Pe* 11 52 58.7673387755 +37 43 07.254113125 7.38 7.20 6.45 5.80 5.35 K1V_Fe-1.5 842 1
26 Gaia DR3 6126095300931121024 * 12 01 13.8267630240 -52 13 16.039460028           ~ 1 0
27 Gaia DR3 6126095232211644160 WD* 12 01 14.7516289656 -52 13 16.475473884           DA 5 0
28 Gaia DR3 6130500567281038080 * 12 24 05.0095238784 -47 00 13.619735928           ~ 1 0
29 Gaia DR3 6130500670360253312 PM* 12 24 05.5701005208 -47 00 15.130966752           ~ 1 0
30 Gaia DR2 6074397471079635328 PM* 12 39 49.5511840908 -54 40 13.572079424           ~ 1 0
31 Gaia DR3 6074397471080379776 * 12 39 49.9767671472 -54 40 08.848347312           ~ 1 0
32 Gaia DR3 5840411359350016128 * 13 05 50.2088243352 -72 18 02.298173184           ~ 2 0
33 PM J13058-7218 PM* 13 05 51.7292340830 -72 18 08.332374793     17.21     ~ 5 0
34 Gaia DR3 5862333048558480384 * 13 06 01.5184520234 -63 31 57.676226739           ~ 2 0
35 [SLK2018] 323066023 PM* 13 06 02.1018214680 -63 31 59.300616000           ~ 2 0
36 Gaia DR3 6082407619449930880 * 13 22 53.5511342736 -50 04 20.679059244           ~ 1 0
37 L 257-3 PM* 13 22 54.9975660312 -50 04 15.460252572   14.89 13.68 13.20   ~ 3 0
38 UCAC4 121-092416 * 13 30 39.6933694848 -65 58 47.387255268       14.932   ~ 1 0
39 Gaia DR3 5863711561290571008 PM* 13 30 41.1029942856 -65 58 45.446670984           ~ 1 0
40 NAME Proxima Centauri PM* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1483 0
41 Gaia DR3 6282457815883084928 * 14 47 21.8606788200 -17 42 31.230803448           ~ 1 0
42 LP 801-9 WD* 14 47 25.3408507940 -17 42 15.755350506   17.42 16.46     DC10 48 0
43 Gaia DR3 5886942661374132096 * 15 26 14.7117403392 -54 26 09.103980480           ~ 1 0
44 Gaia DR3 5886942661427781760 PM* 15 26 15.9414670080 -54 26 07.419566796           ~ 1 0
45 Gaia DR3 4118914185707335040 * 17 44 28.5520847280 -20 45 17.801859744           ~ 1 0
46 PM J17444-2044 PM* 17 44 29.2641055996 -20 44 49.281681294     15.47     ~ 5 0
47 Gaia DR3 4117081467277401344 * 17 45 10.6703900592 -21 53 50.064278136           ~ 1 0
48 Gaia DR3 4117081643422165120 WD* 17 45 12.5390172074 -21 53 09.252600005           DA: 5 0
49 GAT 771 * 17 57 46.5357791016 +04 47 46.640891940   13.35 12.21     ~ 3 0
50 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 907 2
51 UCAC4 157-194382 * 17 58 38.5234763208 -58 39 50.993182980   15.101 14.089 13.975   ~ 2 0
52 WISE J175839.20-583931.6 PM* 17 58 39.5595827054 -58 39 21.796820900           M6 9 0
53 Gaia DR3 4484348145137243904 * 18 28 39.7553183520 +12 29 15.620528076           ~ 1 0
54 2MASS J18284076+1229207 PM* 18 28 40.7711920224 +12 29 20.826960432           M7.5p 11 0
55 Gaia DR2 4203875648238893696 * 18 56 08.7228145265 -08 23 37.473702233           ~ 1 0
56 2MASS J18560903-0822382 LM* 18 56 09.0241743573 -08 22 38.984929489           ~ 5 0
57 Gaia DR3 4293315662070462080 * 19 16 55.0014902664 +05 07 32.449373976           ~ 1 0
58 VB 10 PM* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 499 1
59 Gaia DR3 2025071792959778688 * 19 38 22.2730107072 +26 37 48.605502792           ~ 1 0
60 Gaia DR3 2025071788687899776 WD* 19 38 22.4706578448 +26 37 59.279812788           DA: 6 0
61 LSPM J2004+0547 PM* 20 04 50.2469842416 +05 47 30.764744598   18.4   16.3   ~ 3 0
62 Gaia DR3 4248799013215266176 * 20 04 50.4647803920 +05 47 25.646306100           ~ 1 0
63 Gaia DR3 1822711900548570624 * 20 09 04.2350789160 +19 46 52.461325920           ~ 1 0
64 Gaia DR3 1822711900548572544 PM* 20 09 04.2377270592 +19 47 00.017206944           ~ 1 0
65 SCR J2037-6347 PM* 20 37 37.6054539960 -63 47 28.182864588   17.61   15.50 13.42 ~ 3 0
66 Gaia DR3 6426625402559392896 * 20 37 39.1405826664 -63 47 38.513109624           ~ 1 0

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