SKAVLBI   ! &+',&+',SKA-JP SKA-VLBI sub-Working GroupSKA"#)(,$*,%
202125

VLBI (very long baseline interferometry)

2VERA

202125

SKA

VLBI (very long baseline interferometry)202125

SKA

3

VLBI (very long baseline interferometry)4

SKA1-MID
VLBI

MeerKAT@Karoo202125

SKA

VLBI (very long baseline interferometry)

5



ASKAP&MWA@MRO
SKA-LOW Phase 2202125

SKA

VLBIiB@CXhefaj

6v 2020"#pq~|vxfFckj
SKAWJB@C X
Ø VLBIb?*[ljdjtorw− ^:>,8 _R#(TB>>1010 K)àu vs{,à9.Z;Nys } t]6n8%.&.
− O_E#]68HL7 "K 4"0U QPV
W >) 2astrometric microlensingàY53S/T./&.$'+TD=<− E+ W xàM

Ø VLBIg*dj X− :>,8 _R#( hNG8`mzQ8à]\M!I.Z;NA
2021"2/5--1SKApq~|vx

10 kpc  !
70.(2017)2021 25SKA10 kpc    
Sgr A* (VERA collaboration in prep.)20212 58SKA.3(, "VLBI !"
(FRB180916.J0156+65, Marcote et al. 2020)9à
Pulse-gatedvisibility à2s
visibility  àEffelsberg +3*4 16-μs &2012%52021 2 5EVN(European VLBI Network)
Gemini-North

SKA#$/-3'13)

VLBIT102@SsOPHWv pqYZhfoPØ;%-dobK

10VNQI@RUC=KIVBL]X[m`− +1p+&r&7Giloec\eg\`G+5:q− RFI (GNSSGXk_Yjqt *nD S7àRFID 'n)6dobRJMWRFI )S02− (E3#pF49><8q− !/SRFIp ?AP$q

à SETIp+/.,#q202125"SKA YZhfo^koa

SKA-VLBI7) 1/3

11v -J<G=& %KØ  170m '(# (SKA1-MID)
SKA-VLBI7 83770%$Ø J.1! "24/:KKaVA
091077+&

6
SKA-VLBIBE;!

Ø FAST(300m(#K57VLBI
SKA17J*

K⇩

SKA-VLBI7;,I202125FASTJ

KSKA>?DCH@FHA12

SKA-VLBII(; 2/3v @)5cSKA1 bVLBIØ >'*&I3 (θ <10 Y\+2)− EHTKF-#*230DJGA− 9=$&I3^(HJ?
Ø SKA1:L]ST/`PLa`L]STI7B<abSKA1.:L]ST/(~100 km)− PL16B%4(SKA1 aàVLBIV_Z 8,D àc FRBECI7I 133I
15m
U[X[L]ST

120 km
SKA1-MID (20212!5LW\Oa"SKA MNVT_Q\_R

13

SKA-VLBIB*: 3/3v 49`249
-C2or49E\OQ3Ø A5)@?D49 ~λ/D
− ALMA Band 6 → <20″
− SKA1-MID Band 2 → <2000″à5)AFRB(.;=(R]MP_%à "VLBI5)B1CØ <6249
àSKA1JEB ^KVE[F _Ø +<6249à492T]X− ,&`8'B"5)à>/07) (VERA _20212#5!

133B
15m
SYWY
E\OQ

120 km
SKA1-MID (EUZI_!$SKA GHTQ]LZ]N"

14


!$%

=(DR=1000)!$%DR=dynamic range
2021 25

# "%DR#

Rioja & Dodson (2017)
SKA&'+*-(,-)

1G;_+Z] or 1G#_9P

15v UVNO'VJ02=3 (LOW, MID Band 1—2)
Ø FRBs, TDEs (tidal disruption events) :v 10nadt8B=/; (MID Band 2)
Ø VERA1GW< v4
Ø #1000Wkrewv.Dowfw2vJ0ms`&vBH>
− $7WTM^X-#HWA1T=C1− @FW?#VR]'1Gv 1nadt8B=/; (MID Band 5)
Ø Sgr A*W@ (π~120 μasLVERATYS#%;_6"RxØ nipuIW@ (π~20 μasxØ  _, ]V\]E 5! *WK_Q]N[20212(5%%)SKA bcljwgqwh

JASMINE)+2?=C#D

1612 MHz OH>B3B
C1000—*,.(%D+(Sjouwerman et al. 1998)
202125

16

JASMINE!$+"*&';?71<BA)9A5+ +
SKA /0:8B4@B6),(aPN`R`G
VLBID!

0(bL17ගᏛⓗཌ䜏

㍤ᗘศᕸ䝬䝑䝥䠄㐃⥆Ἴᨺᑕ䠅㼂㻸㻮㻵 ྜᡂ䝡䞊䝮䝃䜲䝈㻔㻞㻜 䝭䝸⛊⛬ᗘ䠅ගᏛⓗཌ䜏䛾ᦂ䜙䛞䛾኱䛝䛥䠄ᑐᩘ䝇䜿䞊䝹䠅䖃䖃྾཰⥺䝇䝨䜽䝖䝹㻝㻜㻌㼗㼙㻛㼟 ⛬ᗘど⥺㏿ᗘ

ᮾす᪉ྥ䜸䝣䝉䝑䝖202125䃣㻔㻪㻜㻕㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻜Roy et al.
(2012)IJ
༡໭᪉ྥ䜸䝣䝉䝑䝖v &5$"(AGNs)F7-@C<?OTL=Kv G5$c 1TQ`]GOT G/(HI, OH, CH, H2OH)

䖃䖃䖃• >BA6OT9H.;*FEBC<Kd䖃

ae.g. :8OTFIKS_W^`S[_bゅᗘ 䠄ᐇ䝃䜲䝈䠅 䝇䜿䞊䝹 䠄ᑐᩘ䝇䜿䞊䝹䠅• X`V3#+PN`R`L
%D
1J4@2'䖃䖃䖃ගᏛⓗཌ䜏䛾ᵓ㐀㛵ᩘ SKAMNZY`S\`U

SKA1 Generic Sky Surveys =;$@VLBI(# (MID;>Z

18v '+W.B @86ASKA9?7<; & (#v ") and/or OTHXLCRVG and/or VLBI
v #,QUJEFM;*B$@7#,B%4 YOTHX/ ;- Z
c.f. 151VLBI(#:

27390ALMA!

;SKA-SCI-GSR-001 (R. Braun 2016)202125SKADEPNXISXKSKA-VLBIRTOV

19v SKA-VLBI: #HQMNalmightyP1RVLBI^gSØ Fj;<CàH8:>-I62Ø VLBI%"EhE Ni+4XVLBI=-Ø 1(R-D8(σ~1 μas)Ik(R-D(~3,000)K3+
Ø Q+.YV key scienceY/Jc.f. Gaia h~109!iv Global VLBI Alliance R*7S
Ø SKA-VLBIOAY9U4RØ VERA/KaVA/EAVNh

Gh,IZde]IZ`ZI@)iB0'YLWQf?

Ø 5)RVLBIàFAST, ngVLAORA
20212$5&SKA [\cbg_ega%): ;4((K3&(fk=i20v FASTcfVLBIQ SKA-VLBIcfO#mQ− SKA1-MID Band 1—2 / LOW e[_ VLBI$− EAVNeTXl:4P2{uf-<v SKA1L^fjfhfN1
eassembly, integration, verification− HDm l`XbgJ0gbVdS
J0?,qz|q}R70Ru{J0RMQut+R ……

− * @ VERAP2 eaW>QCf8iYfAB

HDU \lfpysv5d/eZ^.69E"GEfFfI]!
20212'5%%)SKAnoxwq~r