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

Full paper

View the references in ADS

Number of rows : 117

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	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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