J/MNRAS/358/563 Diffuse Interstellar Bands in 49 stars (Megier+, 2005)
Correlation patterns between 11 diffuse interstellar bands and
ultraviolet extinction.
Megier A., Krelowski J., Weselak T.
<Mon. Not. R. Astron. Soc., 358, 563-571 (2005)>
=2005MNRAS.358..563M 2005MNRAS.358..563M
ADC_Keywords: Spectroscopy ; Equivalent widths ; Interstellar medium
Keywords: dust, extinction - ISM: molecules
Abstract:
We relate the equivalent widths of 11 diffuse interstellar bands,
measured in the spectra of 49 stars, to different colour excesses in
the ultraviolet. We find that most of the observed bands correlate
positively with the extinction in the neighbourhood of the 2175Å
bump. Correlation with colour excesses in other parts of the
extinction curve is more variable from one diffuse interstellar band
to another; we find that some diffuse bands (5797, 5850 and 6376Å)
correlate positively with the overall slope of the extinction curve,
while others (5780 and 6284Å) exhibit negative correlation. We
discuss the implications of these results on the links between the
diffuse interstellar band carriers and the properties of the
interstellar grains.
Description:
The optical-range observations were acquired using three telescopes.
The spectra obtained with the McDonald Cassegrain echelle
spectrograph, fed with the 2.1-m telescope
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 156 50 Equivalent widths of 11 DIBs in our sample of stars
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See also:
II/149 : Diffuse Interstellar Band Measurements (Snow+ 1977)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name HD/BD name of the star
12- 15 F4.2 mag E(B-V) ? B-V colour excess
18- 20 I3 0.1nm EW5797a ? Equivalent widths of the 5797Å band
measured by Herbig (1993ApJ...407..142H 1993ApJ...407..142H)
22- 26 F5.1 0.1nm EW5797 ? Equivalent width of the 5797Å band
28- 30 F3.1 0.1nm e_EW5797 ? rms uncertainty on EW5797
32- 36 F5.1 0.1nm EW5780 ? Equivalent width of the 5780Å band
38- 41 F4.1 0.1nm e_EW5780 ? rms uncertainty on EW5780
43- 47 F5.1 0.1nm EW5850 ? Equivalent width of the 5850Å band
48- 49 A2 --- n_EW5850 Note on EW5850 (1)
51- 53 F3.1 0.1nm e_EW5850 ? rms uncertainty on EW5850
54 A1 --- u_EW5850 [?] Uncertainty flag on EW5850
56- 60 F5.1 0.1nm EW6196 ? Equivalent width of the 6196Å band
62- 64 F3.1 0.1nm e_EW6196 ? rms uncertainty on EW6196
66- 70 F5.1 0.1nm EW6203 ? Equivalent width of the 6203Å band
71- 72 A2 --- n_EW6203 Note on EW6203 (1)
74- 76 F3.1 0.1nm e_EW6203 ? rms uncertainty on EW6203
77 A1 --- u_EW6203 [?] Uncertainty flag on EW6203
79- 83 F5.1 0.1nm EW6270 ? Equivalent width of the 6270Å band
84- 85 A2 --- n_EW6270 Note on EW6270 (1)
87- 90 F4.1 0.1nm e_EW6270 ? rms uncertainty on EW6270
91 A1 --- u_EW6270 [?] Uncertainty flag on EW6270
93- 98 F6.1 0.1nm EW6284 ? Equivalent width of the 6284Å band
99-100 A2 --- n_EW6284 Note on EW6284 (1)
102-105 F4.1 0.1nm e_EW6284 ? rms uncertainty on EW6284
106 A1 --- u_EW6284 [?] Uncertainty flag on EW6284
108-112 F5.1 0.1nm EW6376 ? Equivalent width of the 6376Å band
113-114 A2 --- n_EW6376 Note on EW6376 (1)
117-119 F3.1 0.1nm e_EW6376 ? rms uncertainty on EW6376
120 A1 --- u_EW6376 [?] Uncertainty flag on EW6376
122-126 F5.1 0.1nm EW6379 ? Equivalent width of the 6379Å band
127-128 A2 --- n_EW6379 Note on EW6379 (1)
130-132 F3.1 0.1nm e_EW6379 ? rms uncertainty on EW6379
133 A1 --- u_EW6379 [?] Uncertainty flag on EW6379
135-139 F5.1 0.1nm EW6614 ? Equivalent width of the 6614Å band
141-143 F3.1 0.1nm e_EW6614 ? rms uncertainty on EW6614
145-148 F4.1 0.1nm EW6660 ? Equivalent width of the 6660Å band
149-150 A2 --- n_EW6660 Note on EW6660 (1)
153-155 F3.1 0.1nm e_EW6660 ? rms uncertainty on EW6660
156 A1 --- u_EW6660 [?] Uncertainty flag on EW6660
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Note (1): Notes are coded as follows:
nm = not measured
bd = below detection
st = stellar line contamination
tl = telluric contamination
fr = part of the spectrum affected by fringing
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Feb-2006