1999A&AS..134..257L

Query : 1999A&AS..134..257L

1999A&AS..134..257L - Astron. Astrophys., Suppl. Ser., 134, 257-262 (1999/January-2)

High-velocity interstellar clouds towards the M 15 globular cluster. I. Low resolution optical data.

LEHNER N., ROLLESTON W.R.J., RYANS R.S.I., KEENAN F.P., BATES B., POLLACCO D.L. and SEMBACH K.R.

Abstract (from CDS):

We present low resolution interstellar spectra of the CaII K and NaI D lines towards 12 stars in the M 15 globular cluster. These sightlines are used to study the small scale structure of the interstellar medium, over scales of a few arcseconds to a few arcminutes. A high-velocity cloud is detected in the CaII and NaI lines at a LSR velocity of approximately ∼70km/s. Tentative velocity and equivalent width variations are observed on scales of a few arcseconds; however, higher resolution data are necessary to quantify the magnitude of these variations. We discuss these observations and their importance for future studies of this high velocity gas at high spectral resolution.

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Journal keyword(s): ISM: high-velocity clouds - ISM: general - ISM: clouds - ISM: structure - globular cluster: individual: M 15 - stars: early-type

Nomenclature: Table 1: Cl* NGC 7078 LRR N1 N=1.

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* SY Equ bC* 21 23 28.8086293896 +09 55 54.920417808 7.37 8.33 8.53     B0.5IIIn 88 0
2 NGC 7078 27 HB* 21 29 35.0885079672 +12 06 03.727423872   15.84 15.09     ~ 17 0
3 NGC 7078 64 RG* 21 29 42.959 +12 09 53.41   16.11 15.25     ~ 29 0
4 NGC 7078 127 * 21 29 48.8701381632 +12 03 07.710025860     14.49     ~ 10 0
5 NGC 7078 143 * 21 29 49.7258302392 +12 10 43.964076324   16.43 16.4     ~ 5 0
6 NGC 7078 154 * 21 29 50.1561786936 +12 09 33.204496068   15.60 14.86     ~ 9 0
7 2MASS J21295270+1211534 RG* 21 29 52.6969655280 +12 11 53.356845948   15.92 15.22   14.34 ~ 5 0
8 NGC 7078 258 * 21 29 53.339 +12 10 42.76   16.56 16.5     ~ 3 0
9 NGC 7078 84 * 21 29 57.886 +12 10 03.65     16.44     ~ 4 0
10 NAME IVC in M 15 Cld 21 29 58 +12 10.0           ~ 13 0
11 NGC 7078 80 * 21 29 58.180 +12 09 54.26     16.56     ~ 5 0
12 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3138 0
13 NGC 7078 48 * 21 30.0 +12 10   16.57 16.56     ~ 7 0
14 NGC 7078 267 * 21 30.0 +12 10   16.73 16.7     ~ 2 0
15 Cl* NGC 7078 LRR N1 * 21 30.0 +12 10           ~ 2 0

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