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TYC 4498-1721-1


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High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun
We present high-dispersion (R~16,000) optical (3900-8700 Å)spectra of 390 stars obtained with the Palomar 60 inch telescope. Themajority of stars observed are part of the Spitzer Legacy ScienceProgram ``The Formation and Evolution of Planetary Systems.'' Throughdetailed analysis we determine stellar properties for this sample,including radial and rotational velocities, Li I λ6708 andHα equivalent widths, the chromospheric activity indexR'HK, and temperature- and gravity-sensitive lineratios. Several spectroscopic binaries are also identified. From ourtabulations, we illustrate basic age- and rotation-related correlationsamong measured indices. One novel result is that Ca II chromosphericemission appears to saturate at vsini values above ~30 kms-1, similar to the well-established saturation of X-raysthat originate in the spatially separate coronal region.

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Observation and Astrometry data

Constellation:Cepheus
Right ascension:01h49m36.88s
Declination:+78°16'13.2"
Apparent magnitude:9.388
Proper motion RA:34.4
Proper motion Dec:-3.5
B-T magnitude:9.84
V-T magnitude:9.426

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 4498-1721-1
USNO-A2.0USNO-A2 1650-00379962
HIPHIP 8500

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