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nntk
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1
2
3
1 2 3
4 5 6
MICROCOPY RESOLUTION TEST CHART
ANSI ..nj ISO Its' tHAU' N, .'
1.0
I.I
1.8
'•25 jii 1.4 i 1.6
^ -APPLIED IM/IGE Inc
FUBLICATIOXS
111 Till;
DOMINION OBSERVATORY
Ol r.WVA, CANADA
\iil. IV, Nil. 14
onniT OF Tin: si'i;('ti{()S(()|'ic iuxauv boss ;5,-,ii
itv w . i:. iiAHi'i:!;, \i..\.
This star (n= i:{'' ;{()•", 5-;{7 42
uas aminiiiiciMl a ~|)cc(i'(i-.c<,pic binary hv Wright
b
an.l Ali.-n in /./,/,■ Oh.^nrahn, l!"ll
in-l,.-pri.ni iiHtruin.'Mt. thi< raiiirc is rather small hir successful
work on the star l.ut in this cas.- the small variation in velocity is olTset hy an excellent
F type spectrum, the lines of which can he vry accurat 'ly measured. For this rea.son
it wu.s j)laco(l on ttie
programme. T! e star's i>hototira|)hic mannituile is ,-,■;}. Thirti
two plates were secure,! in I!)17 and six in 1!)1S, and upon these the orbit is ha.sed. A
preliminary value of the period was arrived at fiom a comparison of the 1017 observations
with the early Lick observations. There was some uncertaintv in the exact number of
cycles elapsing between the ;.,,; .sets of ol,>ervati<,n-~, and the i)eriod, accepted as be.t
at that time, rcpiired a small coirecti.m in onh'r t(. suit tlie IDIS observations. While
the period of Mil 100 days here det..rminc.l suits our own -observations and the 1!)0S
and 11)01) observations of the Kick Observatory, it fails t,, suit their 11)0,-, observation,
.so that even yet some uncertainty exists though this \alue scc-ms to be the onlv po.ssible
one from the obserNations.
About 1.-, or 20 lines were measured .,n each, plate. Their wave-len-ths are given
in the following table, which shows how <,ften they were measured, with the re.siduals
numerical and algebraic. Tlu-e are taken in the s,.nse. mean of j.late minus line velocity!
There are a few whose values should in future be adjusK-d but such has not been done
in the case of this star.
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1
IL'1-.O
JO ,1
■Jli 1,
I'.l J
.111 1.
1
■ .I 7
I
Jli 1
■tj:>o
JO s
:iH :i
1
ij:iti
1 •'
:!S J
:is :(
1
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J I i;
1
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17 J
it
:u :i
:i.s J
'
411
'
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1
jji:.
t2f|-J
li; s
■;
1
:'.7
:tH.:i| J
•J7 J
1
1.-, II
J7 ■ 7
i
1
iins
lit::
1(171
lid ;
l.i 7. i
lis
17 .s
ISO
i
I
J
i:tj
i
JH :(
:iii J
•1
1
IS J
1
ii'.i
10 1
J7:i
1
1
1
•IIHiit
i.f 1
1
+ I*() .".
1
+:).'■> !i
1
\\i luhtcd
Ilicilll
+ 17 SI
- .'0 O'l
■Jl
+ JO r.:!
- JO :u
o:!
+ 17
- Jl
."It
■ »■»
I't
t- :m 11)
- Jl :'.o
10
t- :tt 11
- Jl :iM
Hi
+ -'7-
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1.'.
+ :i7i7
- JO !M»
Jl
Ciirv.
• JS
-
JS
-
Js
. Js
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-
JS
- ■ JS
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* ()
- 1
1
f St
f U :!
f .")
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+ l.-,-7
iiKlill III- nil. >I'M 1 Kiir^ iiI'M |l|S\IO HON' IMI
•JJ'.t
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^
S'.'JIi
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1
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. 10 li
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1
1
l.'.t'.l
+ -iV
i
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J
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1
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tint
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J
27 '1
1
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i
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1
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!
1 .i
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i
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Its
i
It. li
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1
- li
1
42;t:t
40 H
1
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i
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1
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1
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:io:t
1
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ms
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.
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1
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IS :i
i
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i
12 1
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1
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12 K
1
4071
'
- 80
1
4(m:t
+41 4
1
2,S (1
+:t2-7
1
1
S-2j 1
+ !)^«1 I
+ 28^2i }
4(M5
+ 17oi 1
- 5-tl
1
WCinhtrcl
Iiiciin
+ :t.HO.!
+ 2:1 •K7
+ :!4 27
f If, r,()
+ :to (i!(
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V,
- lit (to
- IH til
- IH 24
- 17 01
-- It) (Ml
- 14 ICi
+ 12 ii:t
v.
■ 20
■1<)
■IH
2:i
21
_ .■»*>
+ 1:1
Curv.
•28
■28
■2H
■28
- ^28
■28
■2H
H.'wIIhI
Vplocity
+ 17 6
+ 48
+ 15 «
- !)
+ l.i 5
- 4
+ 4-7
230
I'lMI.K ■.VIII INS OK THi: DdMlNlON OHJSKRVATOKY
Mi;.\srn!'s OK utiss ■.v>u-c<""-iiiiiiii
S402
Vcl Wi
I'.l ^ '.
- L'.'i 1 1 ;
. 2 1. 1
. litii ;
14 11 ;
; 11 '.1 1
. 11 II ;.
. ii :, '.
-liMI 1
2N 1
^4-7 1
S4«7
"
S47!t
H4He
•Slllif
Vcl.
\
V(l. Wi
Vcl. ,\Vt
i
Vrl, iWl,
Wt
Vrl. j
VVt
V.'l. Wt.
^I'.l tl
-i Iti ti
1
:
5
1
- 1 r I
r '^ J
-t 7".»' 1
t:.M
+ t) 7
. '1
+ 17 N
+ .ill
-,-22N
. tl I
- liii
i IN 1
i 10 ()
1
1
1
1
1
1
1
I
; 1
i:,72
- 7 -21 '
- 11. II
r itii
+ !l(l
+ 2l)li
+ if
+ 110
t- '.>-2
1
1
1
:
1
2
1
1
1
i:.'ii!
:."ii',i
:;:::;: '::,!
i.-.oi
1
+ !«•:} 4
+ t» ■ 7 1 1
1
n->i
nii>
-111
— I> ,t
1
1
+ 2(lti
+ ^ 7
1
1
n 1 :.
iiiii
lii'.t.-
+ 4-7
1
lilsii
+ 10-(); 1
liC.l
+ 7-s
r ;fi
+ 13S
+ 22 4
+ 1I
. ',1 ii
'i - 1
+ 7-1
\ cldiMly
■ 1
■ -J
ORBIT OF THK HPKCTKOHCOPIC BINARY BOSH 3511
231
The Ottawa observations were grouped acrording to phase, using tlie {)eriod 1 tU 100
days, into 9 nornial places of e(|ual weight and, after preliniiiutry elements had been
obtained graphieiilly, a least-stpuires solution was carried through to derive corrected
values. Mie preliminary elements adopted were:
P = 1 01 100 days
c = •().■)
CO = 19,^)°
A' = 10 o km.
7 = +7- 10 km.
7' = .I.n. 2,417,01S.OL>0
The most satisfactory solution was obtained when 7', the tin\e of jx'riastron ])assafie,
was considered fixed and corrections determined for the remaining four elements, c, w,
K and 7. The period was considered iletermined from the earlj' obser\ations taken in
conjunction with our own.
XOHMAI. I'LACKS
Mean I'ha.'p
Mean Velocity
o-c
1
1 i;i()
1 :M4
1-521
■14S
•24ti
•444
■594
•7.^1
•)>h:{
-h .")-9K
- 002
- 4-20
- .W
+ .')-7()
+ 11 10
+ 1."):!,-)
+ 1()()7
+ 1.t(«
- 71
'>
+ -M
■•''1
3
4
- 1 (I.")
5
+ 1 ■ 44
ti
7
+ 04
— O't
8
9
+ -IVi
Making the substitutions,
J = 67
2/ = 5A'
2 - K-he
u = K ■ 5(1}
in the Lchmann-Filhos formula, the following observation etiuations resulted
OBSKRVATIOX KQIATIOXS FOR iiO.'^S :).-)! 1
No
I
2
3
4
5
ti
7
8
9
1-000
1-000
1-000
1 000
1-000
1000
1-000
1-000
1-000
+ -088
- -tiO:!
-1 040
- -672
- -308
+ -i49
+ -8;}2
+ •9.')0
+ -812
+ -848
+ -434
-809
-018
729
7(M)
322
940
tHKJ
+
U
-•97S
--7.'51
-112
+ -794
+ ■978
+ •881
+ -4S7
- ■O.'i.'i
-•497
-n
+
+
+ 2t)4=()
- 16 =
•37=0
•ti2 =
-184=0
+ 71=0
+ 48=0
+ 100 =
+ .59=0
2.V2
ITIU.ICATIONS III' THK DOMINION OHSKIlVATOU'i
NOKMAI, KQI'ATIONS
•t(io(i.i -L ^is;/ - r_'S2 + •747(i +;',sio = ()
4 ,')72(/ - ■'.»4.".2 + OtlOK +2-202=1)
4 1();iz + •.')04i/ -1 •010 =
4:5Sl« -2 002 =
Fnini these tli(-re resulted tlie small ei)rrectii)ns,
67 = — AC) km.
5 A' = -44 km.
:,. = + .(104
6w = +4 ■().')
-o that the final vahies of the elements are:
P = 1 1)1100 (lays
c = orA
CO == lltll" ■().')
A' = loot) km.
y = +t)(;4 km.
T = .1.1). 2,417.01S-020
« sin / = 222,500 km.
»(■ sin'' /
— L . = .0002 O
itn + nii)-
Dominion Observatory
Ottawa
.\l)ril. litis.
Miiii
3 T33M aaobisia a
ORBIT OF THE SPECTROSCOPIC BINARY BOSS 3511
233
km
4 15
+12
+ 9
+ 6
+ 3
o-
,^ — <
^
/
/
\
/o
/
N
i
/
s
0/'
\
1
7"
\
k
/
'o
/
1
1
Day!
0-6 10
Radial Velocity Curve of Boss 3511
1 5 JUIN I999i^