100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope
We describe the results of observations with the 100 m Robert C. Byrd Green Bank Telescope in the H i line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys. Of 105 objects observed, we detected 77 galaxies with the following median parameters: an...
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IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/add888 |
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| author | Aleksandra E. Nazarova John M. Cannon Igor D. Karachentsev Dmitry I. Makarov Maksim I. Chazov Lila Schisgal William St. John |
| author_facet | Aleksandra E. Nazarova John M. Cannon Igor D. Karachentsev Dmitry I. Makarov Maksim I. Chazov Lila Schisgal William St. John |
| author_sort | Aleksandra E. Nazarova |
| collection | DOAJ |
| description | We describe the results of observations with the 100 m Robert C. Byrd Green Bank Telescope in the H i line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys. Of 105 objects observed, we detected 77 galaxies with the following median parameters: an H i flux of 0.69 Jy km s ^−1 , a heliocentric velocity of 732 km s ^−1 , and a W _50 line width of 32 km s ^−1 . Seventy are isolated late-type objects and 35 are new probable satellites of nearby spiral galaxies (NGC 628, NGC 2787, NGC 3556, NGC 4490, NGC 4594, and NGC 5055). The detected galaxies are predominantly gas-rich systems with a median gas-to-stellar-mass ratio of 1.87. In general, they follow the classic Tully–Fisher relation obtained for large disk-dominated spiral galaxies if their M _21 magnitudes are used instead of B magnitudes. |
| format | Article |
| id | doaj-art-7e0511a657d246208ca2eb1bf3c94fc7 |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj-art-7e0511a657d246208ca2eb1bf3c94fc72025-08-20T03:28:10ZengIOP PublishingThe Astronomical Journal1538-38812025-01-0117012310.3847/1538-3881/add888100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank TelescopeAleksandra E. Nazarova0John M. Cannon1https://orcid.org/0000-0002-1821-7019Igor D. Karachentsev2Dmitry I. Makarov3https://orcid.org/0000-0001-9110-3221Maksim I. Chazov4Lila Schisgal5https://orcid.org/0009-0007-3163-3678William St. John6Special Astrophysical Observatory , The Russian Academy of Sciences, Nizhnij Arkhyz, Karachai-Cherkessian Republic 369167, Russian Federation ; a.e.nazarova@sao.ruPhysics and Astronomy Department, Macalester College , 1600 Grand Avenue, Saint Paul, MN 55105, USASpecial Astrophysical Observatory , The Russian Academy of Sciences, Nizhnij Arkhyz, Karachai-Cherkessian Republic 369167, Russian Federation ; a.e.nazarova@sao.ruSpecial Astrophysical Observatory , The Russian Academy of Sciences, Nizhnij Arkhyz, Karachai-Cherkessian Republic 369167, Russian Federation ; a.e.nazarova@sao.ruSpecial Astrophysical Observatory , The Russian Academy of Sciences, Nizhnij Arkhyz, Karachai-Cherkessian Republic 369167, Russian Federation ; a.e.nazarova@sao.ruPhysics and Astronomy Department, Macalester College , 1600 Grand Avenue, Saint Paul, MN 55105, USAPhysics and Astronomy Department, Macalester College , 1600 Grand Avenue, Saint Paul, MN 55105, USAWe describe the results of observations with the 100 m Robert C. Byrd Green Bank Telescope in the H i line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys. Of 105 objects observed, we detected 77 galaxies with the following median parameters: an H i flux of 0.69 Jy km s ^−1 , a heliocentric velocity of 732 km s ^−1 , and a W _50 line width of 32 km s ^−1 . Seventy are isolated late-type objects and 35 are new probable satellites of nearby spiral galaxies (NGC 628, NGC 2787, NGC 3556, NGC 4490, NGC 4594, and NGC 5055). The detected galaxies are predominantly gas-rich systems with a median gas-to-stellar-mass ratio of 1.87. In general, they follow the classic Tully–Fisher relation obtained for large disk-dominated spiral galaxies if their M _21 magnitudes are used instead of B magnitudes.https://doi.org/10.3847/1538-3881/add888Dwarf galaxiesIrregular galaxiesGalaxy distancesDwarf irregular galaxies |
| spellingShingle | Aleksandra E. Nazarova John M. Cannon Igor D. Karachentsev Dmitry I. Makarov Maksim I. Chazov Lila Schisgal William St. John 100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope The Astronomical Journal Dwarf galaxies Irregular galaxies Galaxy distances Dwarf irregular galaxies |
| title | 100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope |
| title_full | 100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope |
| title_fullStr | 100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope |
| title_full_unstemmed | 100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope |
| title_short | 100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope |
| title_sort | 100 proof h i observations of 100 nearby dwarf galaxies with the 100 m green bank telescope |
| topic | Dwarf galaxies Irregular galaxies Galaxy distances Dwarf irregular galaxies |
| url | https://doi.org/10.3847/1538-3881/add888 |
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