2015A&A...581A..58R

Query : 2015A&A...581A..58R

2015A&A...581A..58R - Astronomy and Astrophysics, volume 581A58-58 (2015/9-1)

A note on the use of surface offset corrections in asteroseismic model fitting.

ROXBURGH I.W.

Abstract (from CDS):

We critically investigate the practice of adding a power-law surface offset correction f(ν) to the frequencies of stellar models prior to seeking best fit models to an observed star. We show that surface layer independent indicators of the internal structure, phase shifts and separation ratios, are displaced in frequency by f(ν) and are therefore not the same as those of the model. Consequently such best fit models do not have exactly the same interior structure as the observed star. Using results on the star HD177153 we show that the difference between observed and model frequencies for best fit models obtained using surface layer independent procedures have a wide range of different offsets which do not in general follow a Kjeldsen-like power law, and further that best fit models obtained using the offset correction procedure do not necessarily satisfy surface layer independent constraints on the internal structure.

Abstract Copyright: ∼

Journal keyword(s): stars: oscillations - asteroseismology - stars: interiors - methods: analytical - methods: numerical

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 177153 PM* 19 01 39.6780721176 +41 29 24.328113936   7.76 7.21     G0 133 0

Query : 2015A&A...581A..58R

Basic data :
HD 177153 -- High Proper Motion Star
Other object types: otypes_help 		* (HD,AG,...), PM* (2016A&A), NIR (2MASS)
ICRS coord. (ep=J2000) : 		19 01 39.6780721176 +41 29 24.328113936 (Optical) [ 0.0120 0.0123 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 00 03.1835315837 +41 24 59.743784909 [ 0.0120 0.0123 90 ]
Gal coord. (ep=J2000) : 		071.8790915557097 +15.8045293987492 [ 0.0120 0.0123 90 ]
Proper motions mas/yr : 		-77.731 31.230 [0.014 0.015 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -14.950 [0.0042] / z(spectroscopic) -0.000050 [0.000000] / cz -14.95 [0.00]
   (Opt) A 2018A&A...616A...7S
Parallaxes (mas): 		24.1586 [0.0142] A 2020yCat.1350....0G
Spectral type: 		G0 E 1993yCat.3135....0C
Fluxes (6) :
B 7.76 [0.01] D 2000A&A...355L..27H
V 7.21 [0.01] D 2000A&A...355L..27H
G 7.075103 [0.002761] C 2020yCat.1350....0G
J 6.145 [0.020] C 2003yCat.2246....0C
H 5.923 [0.026] C 2003yCat.2246....0C
K 5.829 [0.023] C 2003yCat.2246....0C
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Identifiers (21) :
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HD 177153 HIP 93427 SKY# 35140 Gaia DR3 2103877089862772352
AG+41 1656 KIC 6106415 SPOCS 2186 Gaia DR1 2103877085568649216
BD+41 3210 2MASS J19013967+4129243 SPOCS 824 Gaia DR2 2103877089862772352
GEN# +1.00177153 NAME Perky TIC 120495825
GSC 03128-01563 PPM 57767 TYC 3128-1563-1
HIC 93427 SAO 48012 uvby98 100177153

References (133 between 1850 and 2026) (Total 133)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 5    Diameter : 1    Distance : 2    Rot : 4    Fe/H : 15    Plx : 6    PM : 5    SpT : 1   

   

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HD 177153 AG+41 1656 BD+41 3210 GSC 03128-01563 HIC 93427
HIP 93427 KIC 6106415 2MASS J19013967+4129243 PPM 57767 SAO 48012
TYC 3128-1563-1 uvby98 100177153 Gaia DR3 2103877089862772352 Gaia DR1 2103877085568649216 Gaia DR2 2103877089862772352

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