2003A&A...412..219M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.02CEST14:37:34

2003A&A...412..219M - Astronomy and Astrophysics, volume 412, 219-228 (2003/12-2)

HD 19993 and HD 29035: New bright A-type emission-line stars.

MIROSHNICHENKO A.S., KUSAKIN A.V., BJORKMAN K.S., DRAKE N.A., RUDY R.J., LYNCH D.K., MAZUK S., VENTURINI C.C., PUETTER R.C. and PERRY R.B.

Abstract (from CDS):

We present the results of photometric and spectroscopic observations of two A-type stars (HD 19993 and HD 29035), optical counterparts of the IRAS sources (F03108+3729 and 04331+5211, respectively). Hα line emission is found in the optical spectra of both objects for the first time. Our analysis of the spectral line profiles and the photometric information shows that HD 19993 is an A7/8 II star (Teff∼7500±200K, logg=2.7±0.2, vsini=35±2km/s, M=4.8±0.8Msun) with a mild metal deficit ([Fe/H]~-0.3±0.1), while HD 29035 is a B9/A0 V star (Teff∼10000K, logg∼4, vsini∼150km/s). The presence of an IR excess and the Hα emission in combination with a very different location in the Hertzsprung-Russell diagram suggest the different nature and evolutionary stages of the objects. We conclude that HD 29035 is a candidate Herbig Ae type star, a possible member of a group of similar objects. HD 19993 seems to be a post-main-sequence object.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - techniques: photometric - stars: circumstellar matter - stars: individual: HD 19993, HD 29035

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 4881 * 00 51 33.7899557334 +51 34 17.128881532 6.200 6.250 6.220     B9.5V 51 0
2 HD 5839 ** 01 01 30.14547 +69 21 30.6795       7.72   B9 43 0
3 * phi Cas s*y 01 20 04.9146181556 +58 13 53.812633124 6.15 5.66 4.98 4.34 3.78 F0Ia 252 0
4 HD 19993 Em* 03 14 01.3594913400 +37 40 26.042846754   8.77 8.26 7.9   A7/A8IIe 12 0
5 HD 29035 Be* 04 36 59.0779092121 +52 17 13.483411085   9.04 8.78     B9.5Ve 11 0
6 HD 29645 PM* 04 41 50.2558302559 +38 16 48.653863947   6.56   5.6   F9IV-V 120 0
7 * rho Gem ** 07 29 06.71887 +31 47 04.3773 4.48 4.50 4.18 3.86 3.67 F1V 310 0
8 HD 59612 * 07 29 51.4121211636 -23 01 27.437916738 5.27 5.10 4.86 4.58 4.38 A5/7Iab/II 118 1
9 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2504 0
10 HD 184761 PM* 19 34 58.9696800358 +27 13 31.222607898   7.00 6.73     A3 21 0

    Equat.    Gal    SGal    Ecl

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2020.07.02-14:37:34

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