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HD 10502


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Spectroscopy of Early F Stars: γ Doradus Candidates and Possible Metallic Shell Stars
We obtained high-resolution spectroscopic observations of 34 γDoradus candidates. From the red-wavelength spectra, we determinedspectral classes, radial velocities, and projected rotationalvelocities. The spectra of seven late A or early F stars show metalliclines that have composite profiles consisting of a narrow component nearthe center of a broad line, indicating that they may be shell stars orbinaries. Several stars, including HD 152896, HD 173977, HD 175337, andHD 195068/9, show large line profile asymmetries. Two stars, HD 11443(=α Trianguli) and HD 149420, are ellipsoidal variables and notγ Doradus stars. The percentage of binary systems in our samplemay be as high as 74%.

Five New δ Scuti Stars
We present high-resolution spectroscopy and precision photometry of fivenew, relatively bright δ Scuti stars. They were originally chosenas photometric comparison stars in our program of automated,high-precision photometry of solar-type stars and subsequentlyrecognized as new variable stars. We conducted follow-up spectroscopicand photometric observations to determine the properties of the starsand their types of variability. All five of the stars presented herebelong to the most common subgroup of low-amplitude, Population Iδ Scuti variables. One of the stars, HD 10502, is the thirdexample of a δ Scuti variable with composite broad and narrowspectroscopic line profiles suggesting the presence of a circumstellarshell or disk.

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Observation and Astrometry data

Constellation:Poissons
Right ascension:01h42m35.83s
Declination:+10°14'40.4"
Apparent magnitude:7.291
Distance:96.061 parsecs
Proper motion RA:-22.3
Proper motion Dec:-23.2
B-T magnitude:7.623
V-T magnitude:7.319

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 10502
TYCHO-2 2000TYC 625-1336-1
USNO-A2.0USNO-A2 0975-00385328
HIPHIP 7987

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