NIHAO XXI: The emergence of Low Surface Brightness galaxies
| Title: | NIHAO XXI: The emergence of Low Surface Brightness galaxies |
|---|---|
| Authors: | Di Cintio, Arianna, Brook, Chris B., Macciò, Andrea V., Dutton, Aaron A., Cardona-Barrero, Salvador |
| Publication Year: | 2019 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics |
| More Details: | The existence of galaxies with a surface brightness $\mu$ lower than the night sky has been known since three decades. Yet, their formation mechanism and emergence within a $\rm\Lambda CDM$ universe has remained largely undetermined. For the first time, we investigated the origin of Low Surface Brightness (LSB) galaxies with M$_{\star}$$\sim$10$^{9.5-10}$M$_{\odot}$, which we are able to reproduce within hydrodynamical cosmological simulations from the NIHAO suite. The simulated and observed LSBs share similar properties, having large HI reservoir, extended star formation histories and effective radii, low S\'{e}rsic index and slowly rising rotation curves. The formation mechanism of these objects is explored: simulated LSBs form as a result of co-planar co-rotating mergers and aligned accretion of gas at early times, while perpendicular mergers and mis-aligned gas accretion result in higher $\mu$ galaxies by $z$=0. The larger the merger, the stronger the correlation between merger orbital configuration and final $\mu$. While the halo spin parameter is consistently high in simulated LSB galaxies, the impact of halo concentration, feedback-driven gas outflows and merger time only plays a minor-to-no role in determining $\mu$. Interestingly, the formation scenario of such `classical' LSBs differs from the one of less massive, M$_{\star}$$\sim$10$^{7-9}$M$_{\odot}$, Ultra-Diffuse Galaxies, the latter resulting from the effects of SNae driven gas outflows: a M$_{\star}$ of $\sim$10$^9$M$_{\odot}$ thus represents the transition regime between a feedback-dominated to an angular momentum-dominated formation scenario in the LSB realm. Observational predictions are offered regarding spatially resolved star formation rates through LSB discs: these, together with upcoming surveys, can be used to verify the proposed emergence scenario of LSB galaxies. Comment: MNRAS Accepted 2019 April 02; in original form 2019 January 24. 15 pages,17 figures. main results in Fig 12 and 14. Added appendix A |
| Document Type: | Working Paper |
| DOI: | 10.1093/mnras/stz985 |
| Access URL: | http://arxiv.org/abs/1901.08559 |
| Accession Number: | edsarx.1901.08559 |
| Database: | arXiv |
| FullText | Text: Availability: 0 CustomLinks: – Url: http://arxiv.org/abs/1901.08559 Name: EDS - Arxiv Category: fullText Text: View this record from Arxiv MouseOverText: View this record from Arxiv – Url: https://resolver.ebsco.com/c/xy5jbn/result?sid=EBSCO:edsarx&genre=article&issn=&ISBN=&volume=&issue=&date=20190124&spage=&pages=&title=NIHAO XXI: The emergence of Low Surface Brightness galaxies&atitle=NIHAO%20XXI%3A%20The%20emergence%20of%20Low%20Surface%20Brightness%20galaxies&aulast=Di%20Cintio%2C%20Arianna&id=DOI:10.1093/mnras/stz985 Name: Full Text Finder (for New FTF UI) (s8985755) Category: fullText Text: Find It @ SCU Libraries MouseOverText: Find It @ SCU Libraries |
|---|---|
| Header | DbId: edsarx DbLabel: arXiv An: edsarx.1901.08559 RelevancyScore: 983 AccessLevel: 3 PubType: Report PubTypeId: report PreciseRelevancyScore: 982.667358398438 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: NIHAO XXI: The emergence of Low Surface Brightness galaxies – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Di+Cintio%2C+Arianna%22">Di Cintio, Arianna</searchLink><br /><searchLink fieldCode="AR" term="%22Brook%2C+Chris+B%2E%22">Brook, Chris B.</searchLink><br /><searchLink fieldCode="AR" term="%22Macciò%2C+Andrea+V%2E%22">Macciò, Andrea V.</searchLink><br /><searchLink fieldCode="AR" term="%22Dutton%2C+Aaron+A%2E%22">Dutton, Aaron A.</searchLink><br /><searchLink fieldCode="AR" term="%22Cardona-Barrero%2C+Salvador%22">Cardona-Barrero, Salvador</searchLink> – Name: DatePubCY Label: Publication Year Group: Date Data: 2019 – Name: Subset Label: Collection Group: HoldingsInfo Data: Astrophysics – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+Astrophysics+of+Galaxies%22">Astrophysics - Astrophysics of Galaxies</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics+-+Cosmology+and+Nongalactic+Astrophysics%22">Astrophysics - Cosmology and Nongalactic Astrophysics</searchLink> – Name: Abstract Label: Description Group: Ab Data: The existence of galaxies with a surface brightness $\mu$ lower than the night sky has been known since three decades. Yet, their formation mechanism and emergence within a $\rm\Lambda CDM$ universe has remained largely undetermined. For the first time, we investigated the origin of Low Surface Brightness (LSB) galaxies with M$_{\star}$$\sim$10$^{9.5-10}$M$_{\odot}$, which we are able to reproduce within hydrodynamical cosmological simulations from the NIHAO suite. The simulated and observed LSBs share similar properties, having large HI reservoir, extended star formation histories and effective radii, low S\'{e}rsic index and slowly rising rotation curves. The formation mechanism of these objects is explored: simulated LSBs form as a result of co-planar co-rotating mergers and aligned accretion of gas at early times, while perpendicular mergers and mis-aligned gas accretion result in higher $\mu$ galaxies by $z$=0. The larger the merger, the stronger the correlation between merger orbital configuration and final $\mu$. While the halo spin parameter is consistently high in simulated LSB galaxies, the impact of halo concentration, feedback-driven gas outflows and merger time only plays a minor-to-no role in determining $\mu$. Interestingly, the formation scenario of such `classical' LSBs differs from the one of less massive, M$_{\star}$$\sim$10$^{7-9}$M$_{\odot}$, Ultra-Diffuse Galaxies, the latter resulting from the effects of SNae driven gas outflows: a M$_{\star}$ of $\sim$10$^9$M$_{\odot}$ thus represents the transition regime between a feedback-dominated to an angular momentum-dominated formation scenario in the LSB realm. Observational predictions are offered regarding spatially resolved star formation rates through LSB discs: these, together with upcoming surveys, can be used to verify the proposed emergence scenario of LSB galaxies.<br />Comment: MNRAS Accepted 2019 April 02; in original form 2019 January 24. 15 pages,17 figures. main results in Fig 12 and 14. Added appendix A – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.1093/mnras/stz985 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/1901.08559" linkWindow="_blank">http://arxiv.org/abs/1901.08559</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.1901.08559 |
| PLink | https://login.libproxy.scu.edu/login?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=edsarx&AN=edsarx.1901.08559 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1093/mnras/stz985 Subjects: – SubjectFull: Astrophysics - Astrophysics of Galaxies Type: general – SubjectFull: Astrophysics - Cosmology and Nongalactic Astrophysics Type: general Titles: – TitleFull: NIHAO XXI: The emergence of Low Surface Brightness galaxies Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Di Cintio, Arianna – PersonEntity: Name: NameFull: Brook, Chris B. – PersonEntity: Name: NameFull: Macciò, Andrea V. – PersonEntity: Name: NameFull: Dutton, Aaron A. – PersonEntity: Name: NameFull: Cardona-Barrero, Salvador IsPartOfRelationships: – BibEntity: Dates: – D: 24 M: 01 Type: published Y: 2019 |
| ResultId | 1 |