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molecules:ism:hcno [2019/09/13 11:43] – updated part on 13C mueller | molecules:ism:hcno [2024/02/01 14:22] (current) – [Cyanic acid] mueller | ||
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===== On the Detection of HCNO Isomers in the Interstellar Medium ===== | ===== On the Detection of HCNO Isomers in the Interstellar Medium ===== | ||
- | **Isocyanic acid**, **HNCO**, was among the very early molecules to be detected in space. The 4< | + | ==== Isocyanic acid ==== |
+ | |||
+ | **HNCO**, was among the very early molecules to be detected in space. The 4< | ||
L. E. Snyder and D. Buhl,\\ | L. E. Snyder and D. Buhl,\\ | ||
- | **[[http://dx.doi.org/ | + | **[[https:// |
// | // | ||
The 1< | The 1< | ||
D. Buhl, L. E. Snyder, and J. Edrich,\\ | D. Buhl, L. E. Snyder, and J. Edrich,\\ | ||
- | **[[http://dx.doi.org/ | + | **[[https:// |
- | // | + | // |
+ | \\ | ||
The molecule is also abundant in dark clouds, such as TMC-1, where the molecule was detected by\\ | The molecule is also abundant in dark clouds, such as TMC-1, where the molecule was detected by\\ | ||
R. L. Brown,\\ | R. L. Brown,\\ | ||
- | **[[http://dx.doi.org/ | + | **[[https:// |
- | // | + | // |
+ | \\ | ||
It was also found in three translucent clouds (CB 17 CB 24, and CB 228):\\ | It was also found in three translucent clouds (CB 17 CB 24, and CB 228):\\ | ||
B. E. Turner, R. Terzieva, and E. Herbst,\\ | B. E. Turner, R. Terzieva, and E. Herbst,\\ | ||
- | **[[http://dx.doi.org/ | + | **[[https:// |
- | // | + | // |
+ | \\ | ||
F. Wyrowski, P. Schilke, and C. M. Walmsley\\ | F. Wyrowski, P. Schilke, and C. M. Walmsley\\ | ||
not only reported on\\ | not only reported on\\ | ||
- | **[[http://cdsads.u-strasbg.fr/ | + | **[[https://ui.adsabs.harvard.edu/ |
//Astron. Astrophys.// | //Astron. Astrophys.// | ||
- | but also on the detection of vibrationally excited HNCO with the IRAM 30 m telescope in Gal 10.47+0.03, | + | but also on the detection of vibrationally excited HNCO with the IRAM 30 m telescope in Gal 10.47+0.03, |
+ | \\ | ||
+ | |||
+ | L. Velilla Prieto, C. Sánchez Contreras, J. Cernicharo, M. Agúndez, G. Quintana-Lacaci, | ||
+ | V. Bujarrabal, F. Herpin, K. M. Menten, and F. Wyrowski\\ | ||
+ | report on\\ | ||
+ | **[[https:// | ||
+ | //Astron. Astrophys.// | ||
+ | The molecules were identified in the course of a line survey of the circumstellar envelope of this O-rich AGB star, aka QX Pup, with the IRAM 30 m dish at 3 to 1 mm.\\ | ||
+ | \\ | ||
J. L. Neill, E. A. Bergin, D. C. Lis, P. Schilke, N. R. Crockett, C. Favre, M. Emprechtinger, | J. L. Neill, E. A. Bergin, D. C. Lis, P. Schilke, N. R. Crockett, C. Favre, M. Emprechtinger, | ||
Line 30: | Line 44: | ||
**[[https:// | **[[https:// | ||
// | // | ||
- | They observed //b//-type transitions of the < | + | They observed //b//-type transitions of the < |
+ | \\ | ||
A. Coutens, J. K. Jørgensen, M. H. D. van der Wiel, H. S. P. Müller, J. M. Lykke, P. Bjerkeli, T. L. Bourke, H. Calcutt, M. N. Drozdovskaya, | A. Coutens, J. K. Jørgensen, M. H. D. van der Wiel, H. S. P. Müller, J. M. Lykke, P. Bjerkeli, T. L. Bourke, H. Calcutt, M. N. Drozdovskaya, | ||
Line 36: | Line 51: | ||
**[[https:// | **[[https:// | ||
//Astron. Astrophys.// | //Astron. Astrophys.// | ||
- | Carrying out a line survey toward IRAS 16293-2422 between 329 and 363 GHz, a deuteration degree of about one percent was derived for source B assuming a < | + | Carrying out a line survey toward IRAS 16293-2422 between 329 and 363 GHz, a deuteration degree of about one percent was derived for source B assuming a < |
+ | \\ | ||
+ | J. Cernicharo, M. Agúndez, C. Cabezas, B. Tercero, R. Fuentetaja, N. Marcelino, and P. de Vicente \\ | ||
+ | announced the\\ | ||
+ | **[[https:// | ||
+ | A study of the isomers of HNCS and HNCO in TMC-1]]**\\ | ||
+ | //Astron. Astrophys.// | ||
+ | The authors detect H< | ||
+ | \\ | ||
---- | ---- | ||
- | The detection of **fulminic acid**, | + | ==== Fulminic acid ==== |
+ | |||
+ | The detection of **HCNO** the second isomer, has been reported by\\ | ||
N. Marcelino, J. Cernicharo, B. Tercero, and E. Roueff,\\ | N. Marcelino, J. Cernicharo, B. Tercero, and E. Roueff,\\ | ||
**[[https:// | **[[https:// | ||
// | // | ||
- | The IRAM 30 m telescope has been employed to detect the //J// = 4 – 3 and 5 – 4 transitions in B1 and toward the protostar position of L1527. The former transition was also detected toward the carbon chain peak of L1527, L1544, and L183. Interestingly, | + | The IRAM 30 m telescope has been employed to detect the //J// = 4 – 3 and 5 – 4 transitions in B1 and toward the protostar position of L1527. The former transition was also detected toward the carbon chain peak of L1527, L1544, and L183. Interestingly, |
- | Obviously, the detection of three transitions would have been more convincing. However, there are several reasons why the detection probably can be viewed as quite secure: the number of lines is quite low in dark clouds, in particular that of U-lines; the rotational temperatures in the two sources, in which both transitions have been detected, is identical within error bars with that of HNCO; the HNCO/HCNO ratio in the sources in which HCNO line(s) have been detected, fall in a fairly narrow range of about 20 – 60. | + | Obviously, the detection of three transitions would have been more convincing. However, there are several reasons why the detection probably can be viewed as quite secure: the number of lines is quite low in dark clouds, in particular that of U-lines; the rotational temperatures in the two sources, in which both transitions have been detected, is identical within error bars with that of HNCO; the HNCO/HCNO ratio in the sources in which HCNO line(s) have been detected, fall in a fairly narrow range of about 20 – 60.\\ |
+ | \\ | ||
+ | J. Cernicharo, M. Agúndez, C. Cabezas, B. Tercero, R. Fuentetaja, N. Marcelino, and P. de Vicente \\ | ||
+ | announced the\\ | ||
+ | **[[https:// | ||
+ | A study of the isomers of HNCS and HNCO in TMC-1]]**\\ | ||
+ | //Astron. Astrophys.// | ||
+ | The authors detect DCNO about a factor of 25 lower in abundance that the main isotopolog.\\ | ||
+ | \\ | ||
---- | ---- | ||
- | **Cyanic acid**, **HOCN**, was identified tentatively in two previously published line surveys of Sgr B2(OH) and in one unpublished survey of the same source:\\ | + | ==== Cyanic acid ==== |
+ | |||
+ | **HOCN** was identified tentatively in two previously published line surveys of Sgr B2(OH) and in one unpublished survey of the same source:\\ | ||
S. Brünken, C. A. Gottlieb, M. C. McCarthy, and P. Thaddeus,\\ | S. Brünken, C. A. Gottlieb, M. C. McCarthy, and P. Thaddeus,\\ | ||
- | **[[http://dx.doi.org/ | + | **[[https:// |
// | // | ||
- | The transitions detected were the // | + | The transitions detected were the // |
+ | \\ | ||
More recently, the Sgr B2 region was studied more thoroughly by:\\ | More recently, the Sgr B2 region was studied more thoroughly by:\\ | ||
S. Brünken, A. Belloche, S. Martín, L. Verheyen, and K. M. Menten,\\ | S. Brünken, A. Belloche, S. Martín, L. Verheyen, and K. M. Menten,\\ | ||
- | **[[http://dx.doi.org/ | + | **[[https:// |
//Astron. Astrophys.// | //Astron. Astrophys.// | ||
- | Data from a line survey of Sgr B2(M) and (N) were supplemented by dedicated searches toward several other positions in the Sgr B2 region. Up to four // | + | Data from a line survey of Sgr B2(M) and (N) were supplemented by dedicated searches toward several other positions in the Sgr B2 region. Up to four // |
+ | \\ | ||
N. Marcelino, M. Agúndez, J. Cernicharo, E. Roueff, and M. Tafalla\\ | N. Marcelino, M. Agúndez, J. Cernicharo, E. Roueff, and M. Tafalla\\ | ||
Line 68: | Line 105: | ||
**[[https:// | **[[https:// | ||
//Astron. Astrophys.// | //Astron. Astrophys.// | ||
- | They also observed HOCN along with HCNO and HNCO toward the dense core L483 in the course of a 3 mm line survey carried out with the IRAM 30 m telescope. | + | They also observed HOCN along with HCNO and HNCO toward the dense core L483 in the course of a 3 mm line survey carried out with the IRAM 30 m telescope.\\ |
+ | \\ | ||
---- | ---- | ||
- | Contributor(s): | + | Contributor(s): |
---- | ---- | ||