J/ApJ/715/1203 υ Andromedae system with HST (McArthur+, 2010)
New observational constraints on the υ Andromedae system with data from
the Hubble Space Telescope and Hobby-Eberly Telescope.
McArthur B.E., Benedict G.F., Barnes R., Martioli E., Korzennik S.,
Nelan E., Butler R.P.
<Astrophys. J., 715, 1203-1220 (2010)>
=2010ApJ...715.1203M 2010ApJ...715.1203M
ADC_Keywords: Radial velocities ; Positional data ; Stars, double and multiple
Keywords: astrometry - planetary systems -
planets and satellites: dynamical evolution and stability -
planets and satellites: fundamental parameters
Abstract:
We have used high-cadence radial velocity (RV) measurements from the
Hobby-Eberly Telescope with existing velocities from the Lick, Elodie,
Harlan J. Smith, and Whipple 60" telescopes combined with astrometric
data from the Hubble Space Telescope Fine Guidance Sensors to refine
the orbital parameters and determine the orbital inclinations and
position angles of the ascending node of components υ And A c
and d. With these inclinations and using M*=1.31M☉ as a primary
mass, we determine the actual masses of two of the companions:
υ And A c is 13.98+2.3-5.3MJup, and υ And A d is
10.25+0.7-3.3MJup. These measurements represent the first
astrometric determination of mutual inclination between objects in an
extrasolar planetary system, which we find to be 29.9±1°. The
combined RV measurements also reveal a long-period trend indicating a
fourth planet in the system. We investigate the dynamic stability of
this system and analyze regions of stability, which suggest a probable
mass of υ And A b. Finally, our parallaxes confirm that u And
B is a stellar companion of υ And A.
Description:
Spectroscopic observations were obtained with the High Resolution
Spectrograph (HRS) at the HET at McDonald Observatory. Our
observations include a total of 237 high-resolution spectra which were
obtained between August of 2004 and July of 2008.
Objects:
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RA (2000) DE Designation(s)
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01 36 47.84 +41 24 19.6 υ And = HD 9826
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 27 79 HET relative radial velocities for υ And
table5.dat 829 1183 HST astrometric data for υ And A & B and
reference stars
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/A+A/523/A91 : CoRoT/Exoplanet fields with MATISSE (Gazzano+, 2010)
J/ApJ/693/1084 : Ten new and updated multiplanet systems (Wright+, 2009)
J/ApJ/654/625 : Radial velocities of 9 long-period objects (Wittenmyer+,
2007)
J/MNRAS/360/1345 : F- and G-type stars in solar neighbourhood (Karatas+, 2005)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d JD Julian date
16- 21 F6.2 m/s RV HET relative radial velocity
23- 27 F5.2 m/s e_RV RV uncertainty
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- obsID HST Observation ID (Dataset)
11- 18 A8 --- Mode HST observing mode; POSITION or TRANSFER
20- 29 A10 --- TarID Raw target ID from proposal (Prop_Tar)
31- 35 I5 --- Prop [9407/10103] Proposal number of observations
37- 40 I4 --- Tar [1/1110] Target ID of observation from
proposal
42- 46 F5.2 mag pVmag [4.09/15.78] Predicted V band magnitude
48- 52 F5.2 mag aVmag [4.11/15.78] Actual V band magnitude
54- 61 F8.5 deg RApdeg Predicted Right Ascension (J2000)
63- 70 F8.5 deg DEpdeg Predicted Declination (J2000)
72- 79 F8.5 deg RAV1 Right Ascension of V1 telescope axis (J2000)
81- 88 F8.5 deg DEV1 Declination of V1 telescope axis (J2000)
90- 97 F8.4 deg rollV3 Roll about V3 of telescope
99-110 F12.6 km Xpos X position of telescope
112-123 F12.6 km Ypos Y position of telescope
125-136 F12.6 km Zpos Z position of telescope
138-146 F9.6 km/s Xvel X velocity of telescope
148-156 F9.6 km/s Yvel Y velocity of telescope
158-166 F9.6 km/s Zvel Z velocity of telescope
168-183 F16.8 d OJD Observation Julian Date; corrected
185-198 F14.8 d MJD Modified Julian observation time
200-203 I4 yr Obs.Y [2001/2006] Year of observation
205-207 I3 d Obs.D [22/365] Day of observation
209-216 A8 "h:m:s" Obs.time The hour:min:sec of observation
218 I1 --- Astro [1] HST Fine Guidance Sensor (FGS) used as
the astrometer
220-224 A5 --- Filt Filter used for observation (F583W or F5ND)
226-228 I3 --- Set [1/100] Set number of observation group
230-242 F13.9 km/s E+XVel Earth plus HST X velocity
244-256 F13.9 km/s E+YVel Earth plus HST Y velocity
258-270 F13.9 km/s E+ZVel Earth plus HST Z velocity
272-281 F10.5 arcsec Xave Uncorrected X position calculated by average
283-291 F9.5 arcsec Yave Uncorrected Y position calculated by average
293-299 F7.5 arcsec e_Xave Standard deviation in Xave
301-307 F7.5 arcsec e_Yave Standard deviation in Yave
309-316 F8.5 --- XYcor [-1,1] XY correlation
318-330 F13.10 arcsec CYcov XY covariance
332-345 F14.9 arcsec Xmed Uncorrected X position calculated by median
347-357 F11.7 arcsec Ymed Uncorrected Y position calculated by median
359-365 F7.5 arcsec Xmad X median average deviation
367-373 F7.5 arcsec Ymad Y median average deviation
375-380 F6.2 s exptm [23.55/102.9] Seconds of FINELOCK data
382-385 I4 --- npix [943/4117] Number of samples from FINELOCK
interval
387-391 A5 --- VLab-Si [FGS1r] Instrument for velocity aberration
393 I1 --- VLab-FGS [1] FGS to measure velocity aberration
395-407 F13.9 arcsec XVLab X position of velocity aberration
409-419 F11.7 arcsec YVLab Y position of velocity aberration
421 I1 --- Dom-GS [2/3] Dominant FGS guider
423-432 F10.4 --- pmtsum Sum of photomultipliers (pmts)
434-442 F9.4 --- pmtxa pmt from channel xa
444-452 F9.4 --- pmtxb pmt from channel xb
454-462 F9.4 --- pmtya pmt from channel ya
464-472 F9.4 --- pmtyb pmt from channel yb
474-476 I3 --- S-bckgd [100] Number of samples for background
478-481 I4 --- NSamX [0/1915] Number of samples for walkdown pmt
diff/sum in X axis
483-489 F7.4 --- xfld/s X pmt diff/sum from fine lock dv interval
491-497 F7.4 --- xwdd/s X pmt diff/sum from walkdown interval
499-504 F6.4 --- k1x Reference X axis S_curve inverse slope of
Upgren69
506-514 F9.6 arcsec xdiff X centroid shift in arcseconds; add to Xmed
516-519 I4 --- NsamY Number of samples for walkdown pmt diff/sum
in Y axis
521-527 F7.4 --- yfld/s Y pmt diff/sum from fine lock dv interval
529-535 F7.4 --- ywdd/s Y pmt diff/sum from walkdown interval
537-542 F6.4 --- k1y Reference Y axis S_curve inverse slope of
Upgren69
544-552 F9.6 arcsec ydiff Y centroid shift in arcseconds; add to Ymed
554-561 F8.3 arcsec ctX Course track X position
563-569 F7.3 arcsec ctY Course track Y position
571-576 I6 arcsec ssAmed Star selector position; theta A
578-583 I6 arcsec ssBmed Star selector position; theta B
585-595 E11.5 arcsec Xvar Variance of X
597-607 E11.5 arcsec Yvar Variance of Y
609-619 E11.5 arcsec Xmvar Median average deviation variance of X
621-631 E11.5 arcsec Ymvar Median average deviation variance of Y
633-643 F11.4 --- ssA1 Predicted star selector position; theta A
645-655 F11.4 --- ssB1 Predicted star selector position; theta B
657-667 F11.9 --- intrhoA Interpolated rhoA lever arm
669-679 F11.9 --- intkA Interpolated kA lever arm
681-691 F11.9 --- Q1 Spacecraft quaternion
693-704 F12.9 --- Q2 Spacecraft quaternion
706-717 F12.9 --- Q3 Spacecraft quaternion
719-730 F12.9 --- Q4 Spacecraft quaternion
732-743 F12.9 --- Palpha Parallax factor α
745-756 F12.9 --- Pdelta Parallax factor δ
758-771 E14.7 arcsec Xsinfit Sinfit position correction for X
773-786 F14.9 arcsec Xfcqc Final X corrected position with quadratic
drift correction
788-800 F13.9 arcsec Yfcqc Final Y corrected position with quadratic
drift correction
802-815 F14.9 arcsec Xfcrc Final X corrected position with rotational
drift correction
817-829 F13.9 arcsec Yfcrc Final Y corrected position with rotational
drift correction
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 22-May-2012