2014A&A...567A...4Z

Query : 2014A&A...567A...4Z

2014A&A...567A...4Z - Astronomy and Astrophysics, volume 567A, 4-4 (2014/7-1)

Refining the asteroseismic model for the young δ Scuti star HD 144277 using HARPS spectroscopy.

ZWINTZ K., RYABCHIKOVA T., LENZ P., PAMYATNYKH A.A., FOSSATI L., SITNOVA T., BREGER M., PORETTI E., RAINER M., HARETER M. and MANTEGAZZA L.

Abstract (from CDS):

HD144277 was previously discovered by Microvariability and Oscillations of Stars (MOST) space photometry to be a young and hot δ Scuti star showing regular groups of pulsation frequencies. The first asteroseismic models required lower than solar metallicity to fit the observed frequency range based on a purely photometric analysis. The aim of the present paper is to determine, by means of high-resolution spectroscopy, fundamental stellar parameters required for the asteroseismic model of HD144277, and subsequently, to refine it. High-resolution, high signal-to-noise spectroscopic data obtained with the HARPS spectrograph were used to determine the fundamental parameters and chemical abundances of HD144277. These values were put into context alongside the results from asteroseismic models. The effective temperature, Teff, of HD144277 was determined as 8640+300–100K, logg is 4.14±0.15 and the projected rotational velocity, υsini, is 62.0±2.0km/s. As the υsin i value is significantly larger than previously assumed, we refined the first asteroseimic model accordingly. The overall metallicity Z was determined to be 0.011 where the light elements He, C, O, Na, and S show solar chemical composition, but the heavier elements are significantly underabundant. In addition, the radius of HD144277 was determined to be 1.55±0.65R☉ from spectral energy distribution fitting, based on photometric data taken from the literature. From the spectroscopic observations, we could confirm our previous assumption from asteroseismic models that HD144277 has less than solar metallicity. The fundamental parameters derived from asteroseismology, Teff, logg, L/L☉ and R/R☉ agree within one sigma to the values found from spectroscopic analysis. As the υsin i value is significantly higher than assumed in the first analysis, near-degeneracies and rotational mode coupling were taken into account in the new models. These suggest that HD144277 has an equatorial rotational velocity of about 80km/s and is seen equator-on. The observed frequencies are identified as prograde modes.

Abstract Copyright: ∼

Journal keyword(s): stars: variables: delta Scuti - stars: oscillations - stars: individual: HD 144277 - stars: fundamental parameters - techniques: photometric - asteroseismology

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 - 2024 		#notes
1 HD 144277 dS* 16 06 33.2124439032 -39 15 34.231738248   7.97 7.87     A1V 28 0

Query : 2014A&A...567A...4Z

Basic data :
HD 144277 -- delta Sct Variable
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		* (HD,CD,...), UV (TD1,[SC96]), dS* (2016AJ), NIR (2MASS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		16 06 33.2124439032 -39 15 34.231738248 (Optical) [ 0.0253 0.0158 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		16 03 11.7452360509 -39 07 30.329830292 [ 0.0253 0.0158 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		339.1276243298338 +09.5283856121199 [ 0.0253 0.0158 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		-14.620 -24.331 [0.034 0.024 90] A 2020yCat.1350....0G
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas): 		6.9378 [0.0298] A 2020yCat.1350....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type: 		A1V C 1982MSS...C03....0H
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (6) :
B 7.97 [0.02] D 2000A&A...355L..27H
V 7.87 [0.01] D 2000A&A...355L..27H
G 7.860332 [0.002779] C 2020yCat.1350....0G
J 7.662 [0.023] C 2003yCat.2246....0C
H 7.702 [0.040] C 2003yCat.2246....0C
K 7.660 [0.018] C 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 1372 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (16) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 144277 GSC 07851-01636 TD1 18837 [SC96] Mis 9
CD-38 10874 2MASS J16063321-3915340 TIC 70032020 Gaia DR2 5997064935667762944
CPC 18 7983 PPM 294663 TYC 7851-1636-1 Gaia DR3 5997064935667762944
CPD-38 6367 SAO 207329 [SC95] ZET 9 Gaia DR1 5997064931348921728

References (28 between 1850 and 2024) (Total 28)
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


distance : 2    Fe_H : 2    PLX : 3    PM : 2    MK : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

HD 144277 CD-38 10874 CPD-38 6367 GSC 07851-01636 2MASS J16063321-3915340
PPM 294663 SAO 207329 TD1 18837 TYC 7851-1636-1 Gaia DR2 5997064935667762944
Gaia DR3 5997064935667762944 Gaia DR1 5997064931348921728

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