2008A&A...480L..13C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST21:35:56

2008A&A...480L..13C - Astronomy and Astrophysics, volume 480, L13-16 (2008/3-2)

Detection of diffuse interstellar bands in M31.

CORDINER M.A., COX N.L.J., TRUNDLE C., EVANS C.J., HUNTER I., PRZYBILLA N., BRESOLIN F. and SALAMA F.

Abstract (from CDS):

We investigate the diffuse interstellar band (DIB) spectrum in the interstellar medium of M31. The DEIMOS spectrograph of the W. M. Keck observatory was used to make optical spectroscopic observations of two supergiant stars, MAG63885 and MAG70817, in the vicinity of the OB78 association in M31 where the metallicity is approximately equal to solar. The λλ5780, 5797, 6203, 6283 and 6613 DIBs are detected in both sightlines at velocities matching the M31 interstellar NaI absorption. The spectra are classified and interstellar reddenings are derived for both stars. Diffuse interstellar band (DIB) equivalent widths and radial velocities are presented. The spectrum of DIBs observed in M31 towards MAG63885 is found to be similar to that observed in the Milky Way. Towards MAG70817 the DIB equivalent widths per unit reddening are about three times the Galactic average. Compared to observations elsewhere in the Universe, relative to reddening the M31 ISM in the vicinity of OB78 is apparently a highly favourable environment for the formation of DIB carriers.

Abstract Copyright:

Journal keyword(s): astrochemistry - galaxies: Local Group - galaxies: ISM - ISM: lines and bands - ISM: clouds - ISM: dust, extinction

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 - 2020
#notes
1 QSO J0013-0024 QSO 00 13 42.4604468701 -00 24 12.671029838   19.17 18.72     ~ 31 0
2 [MLV92] 63885 * 00 40 30.4479068347 +40 35 03.651666117   16.62 16.434 16.188 15.962 B9Ia 2 0
3 NGC 206 As* 00 40 33.8 +40 44 22           ~ 124 0
4 [MLV92] 70817 * 00 40 35.385 +40 36 44.28   18.57 18.22 18.03 17.76 F2I 2 0
5 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10902 1
6 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9440 1
7 SK 143 * 01 10 55.7240228183 -72 42 56.119467414 12.15 12.98 12.89 12.78 11.64 O9.7Ib 72 0
8 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1392 2
9 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5665 1
10 SN 2001el SN* 03 44 30.60 -44 38 23.4   12.81       SNIa 240 1
11 NGC 1448 GiG 03 44 31.915 -44 38 41.38   11.46   10.24 10.9 ~ 225 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
13 * bet01 Sco SB* 16 05 26.2319826 -19 48 19.630018 1.68 2.55 2.62 2.60 2.69 B1V 532 0
14 * alf Gru PM* 22 08 13.98473 -46 57 39.5078 1.11 1.58 1.71 1.75 1.83 B6V 288 0
15 NAME Local Group GrG ~ ~           ~ 6970 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-21:35:56

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