2021A&A...645A.124G


Query : 2021A&A...645A.124G

2021A&A...645A.124G - Astronomy and Astrophysics, volume 645A, 124-124 (2021/1-1)

Automated approach to measure stellar inclinations: validation through large-scale measurements on the red giant branch.

GEHAN C., MOSSER B., MICHEL E. and CUNHA M.S.

Abstract (from CDS):


Context. Measuring stellar inclinations is fundamental to understanding planetary formation and dynamics as well as the physical conditions during star formation. Oscillation spectra of red giant stars exhibit mixed modes that have both a gravity component from the radiative interior and a pressure component from the convective envelope. Gravity-dominated (g-m) mixed modes split by rotation are well separated inside frequency spectra, allowing accurate measurement of stellar inclinations.
Aims. We aim to develop an automated and general approach to measuring stellar inclinations that can be applied to any solar-type pulsator for which oscillation modes are identified. We also aim to validate this approach using red giant branch stars observed by Kepler.
Methods. Stellar inclination impacts the visibility of oscillation modes with azimuthal orders m={-1, 0, +1}. We used the mean height-to-background ratio of dipole mixed modes with different azimuthal orders to measure stellar inclinations. We recovered the underlying statistical distribution of inclinations in an unbiased way using a probability density function for the stellar inclination angle.
Results. We derive stellar inclination measurements for 1139 stars on the red giant branch for which Gehan et al. (2018, A&A, 616, A24) identified the azimuthal order of dipole g-m mixed modes. Raw measured inclinations exhibit strong deviation with respect to isotropy which is expected for random inclinations over the sky. When taking uncertainties into account, the reconstructed distribution of inclinations actually follows the expected isotropic distribution of the rotational axis.
Conclusions. This work highlights the biases that affect inclination measurements and provides a way to infer their underlying statistical distribution. When a star is seen either pole on or equator on, measurements are challenging and result in a biased distribution. Correcting biases that appear in low- and high-inclination regimes allows us to recover the underlying inclination distribution.

Abstract Copyright: © ESO 2021

Journal keyword(s): asteroseismology - methods: data analysis - techniques: photometric - stars: interiors - stars: low-mass - stars: solar-type

VizieR on-line data: <Available at CDS (J/A+A/645/A124): incl.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 117

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Number of rows : 117
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 TYC 3130-1939-1 RG* 18 47 21.0833940789 +44 34 31.329486540   12.65 12.06     G6V 29 0
2 2MASS J18475427+4316231 RG* 18 47 54.2705756299 +43 16 23.123342186   13.00 11.65     ~ 12 0
3 KIC 6924074 * 18 49 04.1823291546 +42 26 09.708643085           ~ 2 0
4 KIC 8145017 RG* 18 49 13.1586913048 +44 01 56.591846888           ~ 4 0
5 2MASS J18511015+4748140 RG* 18 51 10.1542916844 +47 48 13.949793547           K2III 15 0
6 2MASS J18520819+4306304 RG* 18 52 08.1903341549 +43 06 30.384904513           K1IV 14 0
7 2MASS J18541141+4832096 RG* 18 54 11.4163842129 +48 32 09.669580494           K2III 10 0
8 TYC 3544-900-1 RG* 18 54 48.6615469249 +47 08 16.322132886   13.41 11.44     ~ 20 0
9 KIC 5428405 * 18 57 14.4139057099 +40 41 32.998301160           ~ 2 0
10 KIC 11852899 * 18 59 47.9521951165 +50 10 25.524650707           ~ 2 0
11 KOI-5281 RG* 18 59 56.0719714304 +41 52 52.887147205           K1III 17 0
12 KIC 9267654 RG* 19 00 07.4662980202 +45 45 32.504907285           K1IV 30 0
13 2MASS J19005135+3930157 RG* 19 00 51.3405458668 +39 30 15.627040664           ~ 9 0
14 2MASS J19014771+4101375 RG* 19 01 47.7126817611 +41 01 37.471699042           G8IV 7 0
15 Kepler-91 RG* 19 02 41.4979092591 +44 07 00.239792240           K1IV 72 1
16 2MASS J19035980+3815152 RG* 19 03 59.8045577508 +38 15 15.216843839           G8IV-V 13 0
17 KIC 4139632 * 19 04 01.4186822993 +39 14 48.549103416           ~ 3 0
18 2MASS J19045244+3731146 RG* 19 04 52.4438126098 +37 31 14.729427664           ~ 12 0
19 KIC 4638467 * 19 04 59.4832978905 +39 46 32.681915670           ~ 3 0
20 TYC 3124-860-1 RG* 19 05 40.4001062573 +39 52 34.837854696   12.39 11.10     ~ 12 0
21 KOI-5461 RG* 19 07 41.8231484902 +43 49 45.945459989           ~ 14 0
22 2MASS J19075302+4010304 RG* 19 07 53.0235426270 +40 10 30.491408658           ~ 6 0
23 KIC 4042882 * 19 08 47.9618222490 +39 07 57.017610051           ~ 3 0
24 KIC 3531478 RG* 19 09 20.9003779492 +38 38 26.426812999   12.45 12.00     ~ 19 0
25 2MASS J19100674+4315176 RG* 19 10 06.7434758551 +43 15 17.653317013           ~ 11 0
26 KIC 10198496 RG* 19 10 48.2678391272 +47 15 33.817112966           ~ 12 0
27 BD+41 3257C RG* 19 10 56.0419246053 +41 46 01.433216184     12.1792     K1IV 10 0
28 KIC 9882316 RG* 19 10 58.6391649247 +46 46 53.811250993           G8IV-V 28 0
29 KIC 9145781 RG* 19 11 12.2021196778 +45 35 36.729378669   12.86 11.87     K1IV 19 0
30 KOI-6194 RG* 19 11 21.6990889046 +45 35 59.166069701           ~ 21 0
31 KIC 10199289 RG* 19 12 25.9319682443 +47 17 25.180403759           K1III 12 0
32 TYC 3121-874-1 RG* 19 12 28.5312021029 +38 47 30.615539985   11.99 10.98     ~ 12 0
33 KIC 12203197 * 19 13 06.4626428190 +50 48 07.610106405           K1III 5 0
34 KIC 9335457 RG* 19 15 02.0435088398 +45 51 20.073304568           ~ 13 0
35 KOI-8031 RG* 19 16 06.5994747002 +48 08 16.548209371           ~ 8 0
36 KIC 12008916 RG* 19 16 23.1885554023 +50 25 37.851149303   13.53 11.94     K1III 22 0
37 2MASS J19170738+3944290 RG* 19 17 07.3831710393 +39 44 29.128548129   13.02 11.90     ~ 9 0
38 KIC 4738693 * 19 17 26.7604476573 +39 51 16.872540242           K0II 6 0
39 TYC 3129-232-1 RG* 19 19 34.5940948128 +41 28 51.058611564   11.93 10.78     K2III 28 0
40 2MASS J19202419+3930533 RG* 19 20 24.1886546290 +39 30 53.307147766           ~ 9 0
41 TYC 3134-1478-1 RG* 19 20 33.5341667689 +38 17 32.858967747   12.41 11.62     ~ 11 0
42 KIC 2437325 RG* 19 20 52.4354694466 +37 47 15.248775056   17.03 15.85   14.380 K3III 20 0
43 NGC 6791 OpC 19 20 53 +37 46.3   10.52 9.5     ~ 923 0
44 KIC 2570244 RG* 19 21 01.4517526211 +37 48 05.186245053   17.081 15.777   14.467 ~ 17 0
45 KOI-5942 RG* 19 21 28.5437868429 +50 16 14.097188005           K0II 14 0
46 BD+38 3559 RG* 19 22 27.4543322675 +38 50 52.907500781   10.79 9.81     K2 33 0
47 TYC 2666-701-1 RG* 19 22 29.1964506677 +37 10 28.523439942   11.77 11.08     K0III-IV 14 0
48 KOI-5369 RG* 19 25 03.7957517272 +42 44 22.256037609           ~ 18 0
49 KIC 11913545 RG* 19 25 14.8455997265 +50 12 40.365660125   12.86 11.88 11.62   K3III 16 0
50 2MASS J19254511+3845510 RG* 19 25 45.1186327036 +38 45 51.006253552           ~ 11 0
51 KIC 2303101 RG* 19 25 54.4557830477 +37 40 21.216586450           K2IV 18 0
52 2MASS J19260994+4215024 RG* 19 26 09.9476900693 +42 15 02.490537577           ~ 6 0
53 2MASS J19280451+3713548 RG* 19 28 04.5198553254 +37 13 54.797356244           ~ 13 0
54 KIC 8366239 RG* 19 28 19.0902589679 +44 19 18.594810144   13.35 11.71     G6V 43 0
55 2MASS J19282876+4358295 RG* 19 28 28.7583176584 +43 58 29.548276223           ~ 11 0
56 TYC 3134-302-1 RG* 19 28 53.3468231427 +38 35 11.817680332   12.46 11.40     ~ 9 0
57 2MASS J19292999+4113245 RG* 19 29 29.9920360368 +41 13 24.618996959           ~ 12 0
58 KIC 9219983 * 19 30 11.7283583191 +45 41 06.348963595           ~ 3 0
59 TYC 3139-2332-1 RG* 19 31 01.4117407255 +40 48 06.524928164   13.25 11.36     ~ 10 0
60 TYC 3143-1446-1 RG* 19 31 09.7034243780 +41 30 39.968840599   11.64 10.72     ~ 10 0
61 KIC 5879486 RG* 19 31 20.6385975647 +41 11 49.400812568           ~ 3 0
62 2MASS J19312191+3732445 RG* 19 31 21.9051466692 +37 32 44.554227140           ~ 6 0
63 KIC 9157260 RG* 19 31 36.7101989529 +45 32 50.023809023   12.64 12.23     ~ 18 0
64 TYC 3556-958-1 RG* 19 31 40.3698740198 +46 44 25.414235098   11.94 11.40     K1IV 9 0
65 KIC 10734124 * 19 32 04.6487748306 +48 01 48.825564338           ~ 2 0
66 KIC 6952783 * 19 32 29.5870644394 +42 26 51.189545416           K2III 6 0
67 Kepler-432 RG* 19 33 07.7292128625 +48 17 09.145380998           ~ 65 0
68 Kepler-432c Pl 19 33 07.7292128625 +48 17 09.145380998           ~ 8 0
69 KIC 11353313 RG* 19 33 21.2760079602 +49 08 03.131521913           G5V: 27 0
70 2MASS J19340785+4216212 RG* 19 34 07.8639955891 +42 16 21.211258525   12.71 11.41     G8IV-V 7 0
71 Kepler-56 RG* 19 35 02.0013983772 +41 52 18.691751459           ~ 143 1
72 Kepler-56d Pl 19 35 02.0013983772 +41 52 18.691751459           ~ 5 0
73 KOI-3890 RG* 19 35 05.3128747490 +44 38 18.512440505   13.72 12.50 13.28   ~ 28 0
74 KIC 9956184 * 19 35 41.7677226637 +46 53 39.044586181           K1III 5 0
75 KIC 10866415 RG* 19 35 59.6203950263 +48 17 30.377253715   12.64 11.52     K1IV 25 0
76 KIC 9896174 RG* 19 36 09.9490864395 +46 43 23.504659945           G5V 17 0
77 2MASS J19361519+5038394 RG* 19 36 15.1949043015 +50 38 39.427580912           ~ 6 0
78 KIC 11968334 RG* 19 37 09.0141193188 +50 21 41.487853205           K1IV 26 0
79 KIC 7898594 * 19 37 34.2875724844 +43 39 43.021164955           K1III 5 0
80 KIC 8893299 * 19 38 10.3267503262 +45 11 58.466934798           ~ 3 0
81 KOI-5126 RG* 19 39 23.5293621580 +40 14 27.113684545           G6V 15 0
82 2MASS J19400566+4504182 RG* 19 40 05.6593468903 +45 04 18.191924180           K3III 12 0
83 2MASS J19401888+4022152 RG* 19 40 18.8809594753 +40 22 15.236208490     13.59   12.41 ~ 6 0
84 KIC 5111718 RG* 19 40 36.8439392802 +40 15 17.244219635     14.130   12.96 ~ 31 0
85 2MASS J19403688+4356149 RG* 19 40 36.8773091280 +43 56 14.942721068           K2IV 11 0
86 KIC 5112072 RG* 19 40 56.0079689901 +40 13 39.553099238     14.080   12.90 K1IV 38 0
87 NGC 6819 OpC 19 41 18 +40 11.2   8.21 7.3     ~ 509 0
88 TYC 3148-1558-1 RG* 19 41 18.4541398561 +43 14 07.191646785   12.55 11.61     K1IIe 24 0
89 2MASS J19414348+4318384 RG* 19 41 43.4777937497 +43 18 38.471136695   12.30 11.31     K2IV 12 0
90 KIC 7046554 * 19 41 46.8452486673 +42 31 21.006276735           K2IV 3 0
91 KIC 5113441 RG* 19 41 50.6467995907 +40 16 01.022380955     14.310   13.12 ~ 33 0
92 KOI-5393 RG* 19 42 34.8392619482 +43 03 55.205548669           ~ 19 0
93 KIC 10675916 * 19 43 18.4554293470 +47 54 21.441288297           ~ 2 0
94 2MASS J19432757+4834574 RG* 19 43 27.5731594741 +48 34 57.445870141           G6V 13 0
95 KOI-5684 RG* 19 43 29.4966692772 +46 00 52.079213672   12.26 11.34     ~ 34 0
96 KOI-6526 * 19 43 47.8261678880 +40 14 52.144031809           ~ 10 0
97 2MASS J19445931+4736470 RG* 19 44 59.3109789147 +47 36 47.073757498           ~ 6 0
98 2MASS J19462827+4131020 RG* 19 46 28.2751018930 +41 31 02.117801093           K1IV 14 0
99 TYC 3140-2588-1 RG* 19 47 13.6343924069 +40 14 35.269640575   13.73 12.09     ~ 12 0
100 2MASS J19472961+4727029 RG* 19 47 29.6140174891 +47 27 02.922783053           ~ 7 0
101 2MASS J19474065+4042113 RG* 19 47 40.6593404046 +40 42 11.356932077   11.28 10.20     K1IV 12 0
102 2MASS J19474974+4325196 RG* 19 47 49.7388797295 +43 25 19.661108851           ~ 12 0
103 2MASS J19480791+4555040 RG* 19 48 07.9135086017 +45 55 04.068032611           ~ 7 0
104 2MASS J19484001+4010374 RG* 19 48 40.0089370564 +40 10 37.460723974           ~ 8 0
105 TYC 3144-592-1 RG* 19 49 36.5255261248 +41 24 14.226498569   12.22 11.22     ~ 28 0
106 2MASS J19502533+4832177 RG* 19 50 25.3285805967 +48 32 17.787337779   11.56 10.59     ~ 8 0
107 2MASS J19503532+4140035 RG* 19 50 35.3177636920 +41 40 03.616593342           ~ 4 0
108 KOI-5867 RG* 19 50 36.1602202576 +48 37 04.091793134           ~ 9 0
109 KIC 7468195 * 19 50 40.2227214051 +43 02 17.294264914           ~ 2 0
110 TYC 3149-94-1 RG* 19 53 13.7038035594 +44 43 06.215735710   12.63 11.69     ~ 6 0
111 2MASS J19532762+4054051 RG* 19 53 27.6258341465 +40 54 05.192970476           ~ 6 0
112 2MASS J19543279+4234473 RG* 19 54 32.8049968314 +42 34 47.327084654   13.71 11.68     K1IV 15 0
113 KOI-5110 RG* 19 55 02.4991395259 +40 03 09.962145277           G6V 22 0
114 2MASS J19553778+4025505 RG* 19 55 37.7843411943 +40 25 50.598267042           ~ 5 0
115 2MASS J19554547+4053138 RG* 19 55 45.4744800104 +40 53 13.794533770           ~ 8 0
116 2MASS J19584448+4405201 RG* 19 58 44.4904061195 +44 05 20.089364479           ~ 11 0
117 TYC 3162-767-1 RG* 20 03 39.4909948478 +44 49 04.483565630   12.11 11.10     ~ 29 0

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2021.10.26-05:34:24

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