J/ApJS/256/33 Magellan-TESS Survey (MTS). I. Midsurvey results (Teske+, 2021)
The Magellan-TESS Survey.
I. Survey description and midsurvey results.
Teske J., Wang S.X., Wolfgang A., Gan T., Plotnykov M., Armstrong D.J.,
Butler R.P., Cale B., Crane J.D., Howard W., Jensen E.L.N., Law N.,
Shectman S.A., Plavchan P., Valencia D., Vanderburg A., Ricker G.R.,
Vanderspek R., Latham D.W., Seager S., Winn J.N., Jenkins J.M.,
Adibekyan V., Barrado D., Barros S.C.C., Benkhaldoun Z., Brown D.J.A.,
Bryant E.M., Burt J., Caldwell D.A., Charbonneau D., Cloutier R.,
Collins K.A., Collins K.I., Colon K.D., Conti D.M., Demangeon O.D.S.,
Eastman J.D., Elmufti M., Feng F., Flowers E., Guerrero N.M.,
Hojjatpanah S., Irwin J.M., Isopi G., Lillo-box J., Mallia F., Massey B.,
Mori M., Mullally S.E., Narita N., Nishiumi T., Osborn A., Paegert M.,
De Leon J.P., Quinn S.N., Reefe M., Schwarz R.P., Shporer A., Soubkiou A.,
Sousa S.G., Stockdale C., Strom P.A., Tan T.-G., Tang J., Tenenbaum P.,
Wheatley P.J., Wittrock J., Yahalomi D.A., Zohrabi F.
<Astrophys. J. Suppl. Ser., 256, 33-33 (2021)>
=2021ApJS..256...33T 2021ApJS..256...33T (SIMBAD/NED BibCode)
ADC_Keywords: Radial velocities; Stars, masses; Stars, diameters; Exoplanets;
Surveys; Optical
Keywords: Exoplanet astronomy; Radial velocity; Transit photometry
Astrostatistics techniques
Abstract:
Kepler revealed that roughly one-third of Sunlike stars host planets
orbiting within 100 days and between the size of Earth and Neptune.
How do these planets form, what are they made of, and do they
represent a continuous population or multiple populations? To help
address these questions, we began the Magellan-TESS Survey (MTS),
which uses Magellan II/PFS to obtain radial velocity (RV) masses of
30 TESS-detected exoplanets and develops an analysis framework that
connects observed planet distributions to underlying populations. In
the past, small-planet RV measurements have been challenging to obtain
due to host star faintness and low RV semiamplitudes and challenging
to interpret due to the potential biases in target selection and
observation planning decisions. The MTS attempts to minimize these
biases by focusing on bright TESS targets and employing a quantitative
selection function and observing strategy. In this paper, we
(1) describe our motivation and survey strategy, (2) present our first
catalog of planet density constraints for 27 TESS Objects of Interest
(TOIs; 22 in our population analysis sample, 12 that are members of
the same systems), and (3) employ a hierarchical Bayesian model to
produce preliminary constraints on the mass-radius (M-R) relation. We
find that the biases causing previous M-R relations to predict fairly
high masses at 1R⊕ have been reduced. This work can inform
more detailed studies of individual systems and offer a framework that
can be applied to future RV surveys with the goal of population
inferences.
Description:
The Magellan-TESS Survey (MTS) was conceived as a three-year survey
with the Planet Finder Spectrograph (PFS) on Magellan II, at Las
Campanas Observatory in Chile, to measure the radial velocity masses
of 30Rp≤3R⊕ transiting planets detected by TESS in its first
year scanning the southern hemisphere.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 15 Host star key parameters from TICv8
table4.dat 35 547 The Magellan Planet Finder Spectrograph (PFS)
radial velocities
table12.dat 31 26 Radial velocity data of TOI-560
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/A+A/495/959 : Radial velocity curve of HD 189733 (Boisse+, 2009)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/ApJ/734/70 : Chromospheric activity of Southern stars (Arriagada, 2011)
J/A+A/533/A141 : Stellar parameters for 582 HARPS FGK stars (Sousa+, 2011)
J/ApJS/197/8 : Kepler's candidate mult. transiting planets (Lissauer+, 2011)
J/ApJ/767/95 : Improved parameters of smallest KIC stars (Dressing+, 2013)
J/ApJS/210/20 : Small Kepler planets radial velocities (Marcy+, 2014)
J/A+A/564/A125 : AGN Torus model comparison of AGN in the CDFS (Buchner+, 2014)
J/ApJ/790/146 : Planets in Kepler's multi-transiting systems (Fabrycky+, 2014)
J/AJ/148/54 : The Hypatia Catalog (Hinkel+, 2014)
J/ApJ/800/135 : HARPS-N radial velocities of KOI-69 (Dressing+, 2015)
J/A+A/576/A69 : Li abundances in F stars (Delgado Mena+, 2015)
J/ApJ/806/183 : Planet radii of Kepler Object of Interest (Wolfgang+, 2015)
J/ApJ/809/8 : Terrestrial planet occurrence rates for KOIs (Burke+, 2015)
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+, 2015)
J/ApJ/825/19 : Mass-radius relationship for planets (Wolfgang+, 2016)
J/AJ/152/204 : HARPS-N radial velocities of HD 179070 (Lopez-Morales+, 2016)
J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)
J/AJ/153/208 : LCES HIRES/Keck RVel Exoplanet Survey (Butler+, 2017)
J/AJ/154/109 : California-Kepler Survey (CKS). III. Radii (Fulton+, 2017)
J/ApJS/235/38 : Kepler pl. cand. VIII. DR25 reliability (Thompson+, 2018)
J/ApJS/237/38 : Extended abundance analysis of KOIs (Brewer+, 2018)
J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)
J/A+A/619/L10 : pi Men radial velocity curves (Gandolfi+, 2018)
J/ApJS/239/2 : Simulated exoplanets from TESS targets (Barclay+, 2018)
J/AJ/156/264 : CKS. VII. Planet radius gap (Fulton+, 2018)
J/AJ/156/292 : Effect of close companions on planetary radii (Teske+, 2018)
J/A+A/622/L7 : GJ143 and HD23472 radial velocity curves (Trifonov+, 2019)
J/AJ/157/52 : Radial velocity obs. in super-Earth systems (Bryan+, 2019)
J/MNRAS/484/L8 : Correcting HIRES/Keck RVs for syst. errors (Tal-Or+, 2019)
J/ApJ/875/29 : Spectroscopic analysis of the CKS sample. I. (Martinez+, 2019)
J/ApJ/876/L24 : HARPS radial velocities of HD15337 (Gandolfi+, 2019)
J/A+A/627/A43 : Two super-Earths orbiting TOI-402 (Dumusque+, 2019)
J/A+A/628/A39 : Radial velocities of GJ 357 (Luque+, 2019)
J/A+A/629/A111 : L 98-59 (TOI 175) HARPS observations (Cloutier+, 2019)
J/AJ/158/239 : Metal-rich host stars abundances & EWs (Teske+, 2019)
J/A+A/636/A58 : L 168-9 radial velocity curve (Astudillo-Defru+, 2020)
J/AJ/160/96 : CORALIE and PFS radial velocities of HD 86226 (Teske+, 2020)
J/A+A/642/A31 : pi Men radial velocity curves (Damasso+, 2020)
J/A+A/646/A157 : HD 108236 CHEOPS light curves (Bonfanti+, 2021)
J/AJ/162/147 : Rot. periods of 43 TOIs with Evryscope & TESS (Howard+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- TOI [134/1233] TOI star number
6- 14 I9 --- TIC [22221375/460984940] TIC number
16- 45 A30 --- AName Alternate name(s)
47- 50 I4 K Teff [3384/5992] Effective temperature
52- 54 I3 K e_Teff [104/157] Teff uncertainty
56- 61 F6.3 [Sun] [M/H] [-0.19/0.09]? Metallicity
63- 67 F5.3 [Sun] e_[M/H] [0.007/0.08]? [M/H] uncertainty
69- 73 F5.3 pc Rad [0.27/1.15] Stellar radius
75- 79 F5.3 pc e_Rad [0.008/0.07] Rad uncertainty
81- 85 F5.3 Msun Mass [0.24/1.1] Stellar mass
87- 91 F5.3 Msun e_Mass [0.02/0.14] Mass uncertainty
93- 97 F5.3 Lsun Lum [0.009/2] Stellar luminosity
99- 103 F5.3 Lsun e_Lum [0.002/0.05] Lum uncertainty
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- TOI [134/1233] TESS Objects of Interest identifier
6- 15 F10.5 d JD [4722/8931.84] Julian Date of observation;
JD-2450000
17- 23 F7.2 m/s RVel [-250/48] Radial Velocity
25- 28 F4.2 m/s e_RVel [0.29/6] Uncertainty in RVel
30- 35 A6 --- Inst Instrument used (1)
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Note (1): Instrument used as follows:
PFS1 = pre-upgrade Planet Finder Spectrograph on the Magellan II Clay
telescope (28 occurrences)
PFS2 = post-upgrade Planet Finder Spectrograph on the Magellan II Clay
telescope (466 occurrences)
HIRES = HIRES on Keck 1 (38 occurrences)
HARPS = High Accuracy Radial velocity Planet Searcher on the ESO 3.6m
(8 occurrences)
iSHELL = iSHELL spectrometer on the NASA Infrared Telescope Facility
(7 occurrences)
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- TOI [560] TESS Objects of Interest identifier
5- 14 F10.5 d JD [8591.58/8627.52] Julian Date of observation;
JD-2450000
16- 21 F6.2 m/s RVel [-12/9] Radial Velocity
23- 26 F4.2 m/s e_RVel [0.59/1.2] Uncertainty in RVel
28- 31 A4 --- Inst Insrument used ("PSF2")
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 31-Jan-2022