The geometry of the gas surrounding the Central Molecular Zone: on the origin of localized molecular clouds with extreme velocity dispersions
Observations of molecular gas near the Galactic Centre (|l| < 10°, |b| < 1°) reveal the presence of a distinct population of enigmatic compact clouds that are characterized by extreme velocity dispersions (Δv>100kms−1). These extended velocity features are very prominent in the data cubes...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
31 July 2019
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2019, Volume: 488, Issue: 4, Pages: 4663-4673 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stz2054 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1093/mnras/stz2054 Verlag: https://academic.oup.com/mnras/article/488/4/4663/5542237 
|
| Author Notes: | Mattia C. Sormani, Robin G. Treß, Simon C.O. Glover, Ralf S. Klessen, Ashley T. Barnes, Cara D. Battersby, Paul C. Clark, H. Perry Hatchfield and Rowan J. Smith |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1677986786 | ||
| 003 | DE-627 | ||
| 005 | 20220816233631.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 191001s2019 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1093/mnras/stz2054 |2 doi | |
| 035 | |a (DE-627)1677986786 | ||
| 035 | |a (DE-599)KXP1677986786 | ||
| 035 | |a (OCoLC)1341244777 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Sormani, Mattia C. |d 1988- |e VerfasserIn |0 (DE-588)1137195827 |0 (DE-627)894164724 |0 (DE-576)491143990 |4 aut | |
| 245 | 1 | 4 | |a The geometry of the gas surrounding the Central Molecular Zone |b on the origin of localized molecular clouds with extreme velocity dispersions |c Mattia C. Sormani, Robin G. Treß, Simon C.O. Glover, Ralf S. Klessen, Ashley T. Barnes, Cara D. Battersby, Paul C. Clark, H. Perry Hatchfield and Rowan J. Smith |
| 264 | 1 | |c 31 July 2019 | |
| 300 | |a 11 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 01.10.2019 | ||
| 520 | |a Observations of molecular gas near the Galactic Centre (|l| < 10°, |b| < 1°) reveal the presence of a distinct population of enigmatic compact clouds that are characterized by extreme velocity dispersions (Δv>100kms−1). These extended velocity features are very prominent in the data cubes and dominate the kinematics of molecular gas just outside the Central Molecular Zone (CMZ). The prototypical example of such a cloud is Bania Clump 2. We show that similar features are naturally produced in simulations of gas flow in a realistic barred potential. We analyse the structure of the features obtained in the simulations and use this to interpret the observations. We find that the features arise from collisions between material that has been infalling rapidly along the dust lanes of the Milky Way bar and material that belongs to one of the following two categories: (i) material that has ‘overshot’ after falling down the dust lanes on the opposite side; (ii) material which is part of the CMZ. Both types of collisions involve gas with large differences in the line-of-sight velocities, which is what produces the observed extreme velocity dispersions. Examples of both categories can be identified in the observations. If our interpretation is correct, we are directly witnessing (a) collisions of clouds with relative speeds of ∼200kms−1 and (b) the process of accretion of fresh gas onto the CMZ. | ||
| 700 | 1 | |a Treß, Robin G. |d 1987- |e VerfasserIn |0 (DE-588)1137196254 |0 (DE-627)894165542 |0 (DE-576)491144814 |4 aut | |
| 700 | 1 | |a Glover, Simon |e VerfasserIn |0 (DE-588)1043520449 |0 (DE-627)770635903 |0 (DE-576)394879252 |4 aut | |
| 700 | 1 | |a Klessen, Ralf S. |d 1968- |e VerfasserIn |0 (DE-588)120533820 |0 (DE-627)392381532 |0 (DE-576)178685399 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |a Royal Astronomical Society |t Monthly notices of the Royal Astronomical Society |d Oxford : Oxford Univ. Press, 1827 |g 488(2019), 4, Seite 4663-4673 |h Online-Ressource |w (DE-627)314059164 |w (DE-600)2016084-7 |w (DE-576)090955420 |x 1365-2966 |7 nnas |
| 773 | 1 | 8 | |g volume:488 |g year:2019 |g number:4 |g pages:4663-4673 |g extent:11 |a The geometry of the gas surrounding the Central Molecular Zone on the origin of localized molecular clouds with extreme velocity dispersions |
| 856 | 4 | 0 | |u https://doi.org/10.1093/mnras/stz2054 |x Verlag |x Resolving-System |3 Volltext |
| 856 | 4 | 0 | |u https://academic.oup.com/mnras/article/488/4/4663/5542237 |x Verlag |
| 951 | |a AR | ||
| 992 | |a 20191001 | ||
| 993 | |a Article | ||
| 994 | |a 2019 | ||
| 998 | |g 120533820 |a Klessen, Ralf S. |m 120533820:Klessen, Ralf S. |d 700000 |d 714000 |d 714200 |e 700000PK120533820 |e 714000PK120533820 |e 714200PK120533820 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 4 | ||
| 998 | |g 1043520449 |a Glover, Simon |m 1043520449:Glover, Simon |d 700000 |d 714000 |d 714200 |e 700000PG1043520449 |e 714000PG1043520449 |e 714200PG1043520449 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714200/ |p 3 | ||
| 998 | |g 1137196254 |a Treß, Robin G. |m 1137196254:Treß, Robin G. |d 500000 |d 500881 |e 500000PT1137196254 |e 500881PT1137196254 |k 0/500000/ |k 1/500000/500881/ |p 2 | ||
| 998 | |g 1137195827 |a Sormani, Mattia C. |m 1137195827:Sormani, Mattia C. |d 500000 |d 500881 |e 500000PS1137195827 |e 500881PS1137195827 |k 0/500000/ |k 1/500000/500881/ |p 1 |x j | ||
| 999 | |a KXP-PPN1677986786 |e 3519223864 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"name":{"displayForm":["Mattia C. Sormani, Robin G. Treß, Simon C.O. Glover, Ralf S. Klessen, Ashley T. Barnes, Cara D. Battersby, Paul C. Clark, H. Perry Hatchfield and Rowan J. Smith"]},"language":["eng"],"person":[{"display":"Sormani, Mattia C.","given":"Mattia C.","role":"aut","family":"Sormani"},{"given":"Robin G.","display":"Treß, Robin G.","role":"aut","family":"Treß"},{"given":"Simon","display":"Glover, Simon","role":"aut","family":"Glover"},{"given":"Ralf S.","display":"Klessen, Ralf S.","family":"Klessen","role":"aut"}],"recId":"1677986786","note":["Gesehen am 01.10.2019"],"title":[{"subtitle":"on the origin of localized molecular clouds with extreme velocity dispersions","title":"The geometry of the gas surrounding the Central Molecular Zone","title_sort":"geometry of the gas surrounding the Central Molecular Zone"}],"type":{"media":"Online-Ressource","bibl":"article-journal"},"id":{"eki":["1677986786"],"doi":["10.1093/mnras/stz2054"]},"physDesc":[{"extent":"11 S."}],"relHost":[{"disp":"Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society","type":{"bibl":"periodical","media":"Online-Ressource"},"corporate":[{"display":"Royal Astronomical Society","role":"aut"}],"pubHistory":["1.1827 -"],"note":["Gesehen am 15.01.2018"],"language":["eng"],"part":{"text":"488(2019), 4, Seite 4663-4673","pages":"4663-4673","extent":"11","issue":"4","year":"2019","volume":"488"},"origin":[{"publisherPlace":"Oxford ; Oxford [u.a.] ; Oxford [u.a.]","dateIssuedKey":"1827","dateIssuedDisp":"1827-","publisher":"Oxford Univ. Press ; Blackwell ; Wiley-Blackwell"}],"title":[{"title_sort":"Monthly notices of the Royal Astronomical Society","title":"Monthly notices of the Royal Astronomical Society"}],"physDesc":[{"extent":"Online-Ressource"}],"id":{"issn":["1365-2966"],"eki":["314059164"],"doi":["10.1111/(ISSN)1365-2966"],"zdb":["2016084-7"]},"recId":"314059164"}],"origin":[{"dateIssuedKey":"2019","dateIssuedDisp":"31 July 2019"}]} | ||
| SRT | |a SORMANIMATGEOMETRYOF3120 | ||