2002A&A...395..637L


Query : 2002A&A...395..637L

2002A&A...395..637L - Astronomy and Astrophysics, volume 395, 637-645 (2002/11-4)

The complete far infrared spectroscopic survey of Herbig AeBe stars obtained by ISO-LWS.

LORENZETTI D., GIANNINI T., NISINI B., BENEDETTINI M., ELIA D., CAMPEGGIO L. and STRAFELLA F.

Abstract (from CDS):

The ISO-LWS archive has been systematically searched in order to obtain a complete far IR spectrophotometric survey of Herbig AeBe (HAEBE) stars. The investigated sample is constituted by 15 objects which, together with the 11 HAEBE we have published in two previous papers, represents about 25% of all the known HAEBE. This catalogue constitues an essential data-base in view of far IR forthcoming space missions (e.g. Herschel Space Observatory), whose scientific programs are now in the planning phase. The new sources are analysed following the same approach as in our previous papers and both differences and similarities are discussed in a coherent framework. The [OI] 63µm and the [CII] 158µm lines are observed in many of the investigated sources, while the [OI] 145µm remains often undetected, due to its relative faintness. Molecular lines, in form of CO high-J rotational transitions are detected in only three cases and appear associated to local density peaks. A new class of ISO-LWS spectra of HAEBE emerges, constituted by objects without any detected gas feature either in emission or in absorption. Not unexpectedly, these HAEBE are isolated from molecular clouds and, as such, lack of the cold circumstellar material probed by far IR ionic and molecular transitions. By comparing line intensity ratios with model predictions we find that photodissociation caused by the stellar photons and active in a clumpy medium is likely the prevalent excitation mechanism for the far IR lines. Finally, an evolutionary trend is found according to which the contribution of the far IR line emission to the total emitted energy is less and less important with time.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: pre-main sequence - infrared: ISM - ISM: lines and bands - infrared: stars

Simbad objects: 20

goto Full paper

goto View the references in ADS

Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 997 2
2 HD 31648 Ae* 04 58 46.2655706952 +29 50 36.987625680 7.84 7.78 7.62 7.76 7.43 A5Vep 463 0
3 V* V1366 Ori Ae* 05 16 00.4765181328 -09 48 35.393784012 10.19 10.16 9.84 9.77 9.63 B9.5V 184 0
4 HD 36112 Ae* 05 30 27.5285630040 +25 19 57.076288752   8.57 8.27     A8Ve 419 0
5 V* CQ Tau Ae* 05 35 58.4666264136 +24 44 54.091450572 11.290 10.780 10.000   8.33 F5IVe 283 0
6 EM* MWC 137 Ae* 06 18 45.5220873216 +15 16 52.244494608 12.89 13.30 13.759 11.67 10.31 sgB[e]d 236 1
7 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 723 1
8 V* DX Cha Ae* 12 00 05.0868602544 -78 11 34.565724312   6.81 6.60     A0_sh 321 0
9 HD 141569 Y*O 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 501 0
10 HD 142666 TT* 15 56 40.0221861696 -22 01 40.005872148 9.41 9.37 8.82 8.31 8.01 F0V_sh 241 0
11 HD 144432 Ae* 16 06 57.9533126832 -27 43 09.760564056 8.47 8.53 8.19 7.82 7.53 A9/F0V 228 1
12 V* TY CrA Ae* 19 01 40.8284458320 -36 52 33.816176040 10.03 9.92 9.39     B9e 277 0
13 V* R CrA Ae* 19 01 53.6764322232 -36 57 08.299341828 12.781 12.651 11.917 11.242 10.412 B5IIIpe 464 1
14 BD+40 4124 Ae* 20 20 28.2413946720 +41 21 51.529070088 11.11 11.36 10.62 10.510   B2Ve 286 1
15 EM* LkHA 225 Ae* 20 20 30.5955531672 +41 21 26.370826704   18.2 19.17     A4:Ve 81 0
16 HD 200775 Ae* 21 01 36.9205762896 +68 09 47.789578836 7.34 7.754 7.427 8.13   B2Ve 531 0
17 NGC 7129 OpC 21 42 58 +66 06.8     11.5     ~ 245 0
18 EM* LkHA 234 Ae* 21 43 06.8218113480 +66 06 54.202272804 13.65 13.61 12.73 11.98 11.20 B5Ve 282 0
19 EM* LkHA 233 Ae* 22 34 40.9923134958 +40 40 04.251892858   14.5       A7Ve 142 0
20 EM* MWC 1080 Ae* 23 17 25.5895018656 +60 50 43.444557384   13.24 11.542     B0eq 315 0

To bookmark this query, right click on this link: simbad:objects in 2002A&A...395..637L and select 'bookmark this link' or equivalent in the popup menu


2022.08.18-03:45:30

© Université de Strasbourg/CNRS

    • Contact