2019ApJ...873L...4H

Query : 2019ApJ...873L...4H

2019ApJ...873L...4H - Astrophys. J., 873, L4-L4 (2019/March-1)

Asteroseismology of massive stars with the TESS mission: the runaway β Cep pulsator PHL 346 = HN Aqr.

HANDLER G., PIGULSKI A., DASZYNSKA-DASZKIEWICZ J., IRRGANG A., KILKENNY D., GUO Z., PRZYBILLA N., KAHRAMAN ALICAVUS F., KALLINGER T., PASCUAL-GRANADO J., NIEMCZURA E., ROZANSKI T., CHOWDHURY S., BUZASI D.L., MIROUH G.M., BOWMAN D.M., JOHNSTON C., PEDERSEN M.G., SIMON-DIAZ S., MORAVVEJI E., GAZEAS K., DE CAT P., VANDERSPEK R.K. and RICKER G.R.

Abstract (from CDS):

We report an analysis of the first known β Cep pulsator observed by the Transiting Exoplanet Survey Satellite (TESS) mission, the runaway star PHL 346 = HN Aqr. The star, previously known as a singly periodic pulsator, has at least 34 oscillation modes excited, 12 of those in the g-mode domain and 22 p modes. Analysis of archival data implies that the amplitude and frequency of the dominant mode and the stellar radial velocity were variable over time. A binary nature would be inconsistent with the inferred ejection velocity from the Galactic disk of 420 km s–1, which is too large to be survivable by a runaway binary system. A kinematic analysis of the star results in an age constraint (23 ± 1 Myr) that can be imposed on asteroseismic modeling and that can be used to remove degeneracies in the modeling process. Our attempts to match the excitation of the observed frequency spectrum resulted in pulsation models that were too young. Hence, asteroseismic studies of runaway pulsators can become vital not only in tracing the evolutionary history of such objects, but to understand the interior structure of massive stars in general. TESS is now opening up these stars for detailed asteroseismic investigation.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: early-type - stars: individual: HN Aqr - stars: interiors - stars: kinematics and dynamics - stars: massive - stars: oscillations including pulsations

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 V* HN Aqr bC* 22 37 38.2846689672 -18 39 51.268772880   11.293 11.426 11.813   B 70 0

Query : 2019ApJ...873L...4H

Basic data :
V* HN Aqr -- beta Cep Variable
Other object types: otypes_help 		bC* (), * (CPD,ALS,...), blu (2019A&A,PHL), V* (2018AJ,V*), MIR (WISEA,WISE), bC? (2020MNRAS), HS? (2019A&A), NIR (2MASS), Opt (ATO)
ICRS coord. (ep=J2000) : 		22 37 38.2846689672 -18 39 51.268772880 (Optical) [ 0.0495 0.0377 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 34 56.3684098530 -18 55 27.283079289 [ 0.0495 0.0377 90 ]
Gal coord. (ep=J2000) : 		041.1728939704458 -58.1518907133661 [ 0.0495 0.0377 90 ]
Proper motions mas/yr : 		6.208 -4.688 [0.063 0.044 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 63 [4] / z(~) 0.000210 [0.000013] / cz 63.01 [4.00]
   (Opt) D 2011MNRAS.411.2596S
Parallaxes (mas): 		0.1262 [0.053] A 2020yCat.1350....0G
Spectral type: 		B D 2003AJ....125.2531R
Fluxes (9) :
B 11.293 [0.03] D 2012yCat.1322....0Z
V 11.426 [0.01] D 2012yCat.1322....0Z
R 11.813 [0.05] E 2012yCat.1322....0Z
G 11.426677 [0.003211] C 2020yCat.1350....0G
J 11.847 [0.024] C 2003yCat.2246....0C
H 11.931 [0.021] C 2003yCat.2246....0C
K 11.993 [0.024] C 2003yCat.2246....0C
g 11.290 [0.01] D 2012yCat.1322....0Z
i 11.923 [0.03] D 2012yCat.1322....0Z
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Identifiers (16) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

CPD-19 8282 2MASS J22373828-1839513 TYC 6389-235-1 WISEA J223738.28-183951.3
ALS 19786 PHL 346 UCAC4 357-199953 WISE J223738.28-183951.1
ATO J339.4095-18.6642 PPM 240536 uvby98 610160346 V Gaia DR2 2402031280004432512
GSC 06389-00235 TIC 69925250 V* HN Aqr Gaia DR3 2402031280004432512

References (70 between 1850 and 2026) (Total 70)
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

Var : 1    Rot : 1    Fe/H : 2    Plx : 2    PM : 2   

   

Observing logs
IUE : 2   

   

External archives :

Link by name to the catalogue in VizieR :

CPD-19 8282 ALS 19786 GSC 06389-00235 2MASS J22373828-1839513 PHL 346
PPM 240536 TYC 6389-235-1 UCAC4 357-199953 uvby98 610160346 V V* HN Aqr
WISEA J223738.28-183951.3 WISE J223738.28-183951.1 Gaia DR2 2402031280004432512 Gaia DR3 2402031280004432512

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