[vsnet-id 543] (fwd) Welin H alpha stars

[Taichi Kato <tkato>]

Date: Sun, 02 Dec 2001 22:55:37 +0100
From: Gunnar Welin <gunnar.welin@telia.com>
Subject: Welin H alpha stars

Hello,

It was nice to see that someone cares for my old list - I got the update
forwarded from Johan Warell of the Uppsala observatory. But I have a
correction to make, first made in Astrofizika 11, p261, 1975: the star
UHalpha 117 had been misidentified in the original paper, and a new finding
chart and other data were given - sp type M7, Vmag appr 14.5, Bmag appr
16.3. That resolved what had puzzled at least me about a group of five
stars, UHa 98, 108, 117, 120 and 125; they were all found to be M7 stars
from infrared objective prism spectra.

Also included in the Astrofizika paper was the discovery of a new medium
strength Halpha star in the area, UHa 142 = BSD 676, sp type A5, V = 10.8, B
= 11.4. RA 30 46.1, decl +44 37 (1950). Further sp classifications were made
for several stars: UHa 1, G; 2 B:; 4 G-K; 6 G:; 7 F; 9 G-K; 10 G-K; 13 K; 14
B; 16 M; 22 B; 23 K-M; 31 G; 33 M; 38 K::; 42 F::; 44 K:; 48 F; 49 K; 53 B:;
56 M; 64 G:; 66 F:; 68 K-M; 69 K:; 72 M6; 53 G-M; 81 M8; 82 K; 84 M; 85 K;
89 K:; 93 B; 95 B::; 100 K:; 101 K:; 104 G-K; 110 K:; 111 B::; 112 C:
(presumably a misprint for G!); 114 K; 118 B:; 119 B:; 121 G:; 122 G:; 123
K:; 127 G; 128 F; 129 B:; 131 K:; 133 B:; 135 B:; 136 B:; 139 B; 140 G::;
141 B (":" stands for uncertainty).

I did some more work on these stars, but it never got to be published, and I
must admit I do not remember what it all led to; some better sp types,
further checks on varability - it's all in my notes somewhere ...

Best regards,
Gunnar Welin

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