The Distance to High-velocity Cloud Complex M
λ -21 cm HI4PI survey data are used to study the anomalous-velocity hydrogen gas associated with high-velocity cloud Complex M. These high-sensitivity, high-resolution, high-dynamic-range data show that many of the individual features, including MI, MIIa, and MIIb, are components of a long, arched f...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/acac2a |
| _version_ | 1797701252986961920 |
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| author | G. L. Verschuur J. T. Schmelz |
| author_facet | G. L. Verschuur J. T. Schmelz |
| author_sort | G. L. Verschuur |
| collection | DOAJ |
| description | λ -21 cm HI4PI survey data are used to study the anomalous-velocity hydrogen gas associated with high-velocity cloud Complex M. These high-sensitivity, high-resolution, high-dynamic-range data show that many of the individual features, including MI, MIIa, and MIIb, are components of a long, arched filament that extends from about ( l , b ) = (105°, 53°) to ( l , b ) = (196°, 55°). Maps at different velocities, results from Gaussian analysis, and observations of associated high-energy emission make a compelling case that the MI cloud and the arched filament are physically interacting. If this is the case, we can use the distance to MI, 150 pc as reported by Schmelz & Verschuur, to set the distance to Complex M. The estimated mass of Complex M is then about 120 M _⊙, and the energy implied using the observed line-of-sight velocity, −85 km s ^−1 , is 8.4 × 10 ^48 erg. Integrating over 4 π sr, the total energy for a spherically symmetrical explosion is estimated to be 1.9 × 10 ^50 erg, well within the energy budget of a typical supernova. |
| first_indexed | 2024-03-12T04:33:46Z |
| format | Article |
| id | doaj.art-57d7c150ed59457babb5b722e8b5b7a4 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:33:46Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-57d7c150ed59457babb5b722e8b5b7a42023-09-03T09:58:17ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01943216110.3847/1538-4357/acac2aThe Distance to High-velocity Cloud Complex MG. L. Verschuur0https://orcid.org/0000-0002-6160-1040J. T. Schmelz1https://orcid.org/0000-0001-7908-6940USRA, 425 3rd Street SW, Suite 950, Washington, DC, USA ; verschuur@aol.com, jschmelz@usra.eduUSRA, 425 3rd Street SW, Suite 950, Washington, DC, USA ; verschuur@aol.com, jschmelz@usra.eduλ -21 cm HI4PI survey data are used to study the anomalous-velocity hydrogen gas associated with high-velocity cloud Complex M. These high-sensitivity, high-resolution, high-dynamic-range data show that many of the individual features, including MI, MIIa, and MIIb, are components of a long, arched filament that extends from about ( l , b ) = (105°, 53°) to ( l , b ) = (196°, 55°). Maps at different velocities, results from Gaussian analysis, and observations of associated high-energy emission make a compelling case that the MI cloud and the arched filament are physically interacting. If this is the case, we can use the distance to MI, 150 pc as reported by Schmelz & Verschuur, to set the distance to Complex M. The estimated mass of Complex M is then about 120 M _⊙, and the energy implied using the observed line-of-sight velocity, −85 km s ^−1 , is 8.4 × 10 ^48 erg. Integrating over 4 π sr, the total energy for a spherically symmetrical explosion is estimated to be 1.9 × 10 ^50 erg, well within the energy budget of a typical supernova.https://doi.org/10.3847/1538-4357/acac2aInterstellar cloudsHigh-velocity clouds |
| spellingShingle | G. L. Verschuur J. T. Schmelz The Distance to High-velocity Cloud Complex M The Astrophysical Journal Interstellar clouds High-velocity clouds |
| title | The Distance to High-velocity Cloud Complex M |
| title_full | The Distance to High-velocity Cloud Complex M |
| title_fullStr | The Distance to High-velocity Cloud Complex M |
| title_full_unstemmed | The Distance to High-velocity Cloud Complex M |
| title_short | The Distance to High-velocity Cloud Complex M |
| title_sort | distance to high velocity cloud complex m |
| topic | Interstellar clouds High-velocity clouds |
| url | https://doi.org/10.3847/1538-4357/acac2a |
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