Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28986
DC Field | Value | Language |
---|---|---|
dc.contributor.author | PAGGI, Alessandro | en_US |
dc.contributor.author | Kim, Dong-Woo | en_US |
dc.contributor.author | Anderson, Craig | en_US |
dc.contributor.author | Burke, Doug | en_US |
dc.contributor.author | D'Abrusco, Raffaele | en_US |
dc.contributor.author | Fabbiano, Giuseppina | en_US |
dc.contributor.author | FRUSCIONE, ANTONELLA | en_US |
dc.contributor.author | Gokas, Tara | en_US |
dc.contributor.author | Lauer, Jen | en_US |
dc.contributor.author | McCollough, Michael | en_US |
dc.contributor.author | Morgan, Doug | en_US |
dc.contributor.author | Mossman, Amy | en_US |
dc.contributor.author | O'Sullivan, Ewan | en_US |
dc.contributor.author | TRINCHIERI, Ginevra | en_US |
dc.contributor.author | Vrtilek, Saeqa | en_US |
dc.contributor.author | Pellegrini, Silvia | en_US |
dc.contributor.author | Romanowsky, Aaron J. | en_US |
dc.contributor.author | Brodie, Jean | en_US |
dc.date.accessioned | 2020-12-18T09:59:39Z | - |
dc.date.available | 2020-12-18T09:59:39Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28986 | - |
dc.description.abstract | We present results of a joint Chandra/XMM-Newton analysis of the early-type galaxies NGC 4649 and NGC 5846 aimed at investigating differences between mass profiles derived from X-ray data and those from optical data, to probe the state of the hot interstellar medium (ISM) in these galaxies. If the hot ISM is at a given radius in hydrostatic equilibrium (HE), the X-ray data can be used to measure the total enclosed mass of the galaxy. Differences from optically derived mass distributions therefore yield information about departures from HE in the hot halos. The X-ray mass profiles in different angular sectors of NGC 4649 are generally smooth with no significant azimuthal asymmetries within 12 kpc. Extrapolation of these profiles beyond this scale yields results consistent with the optical estimate. However, in the central region (r< 3 kpc) the X-ray data underpredict the enclosed mass, when compared with the optical mass profiles. Consistent with previous results, we estimate a nonthermal pressure component accounting for 30% of the gas pressure, likely linked to nuclear activity. In NGC 5846 the X-ray mass profiles show significant azimuthal asymmetries, especially in the NE direction. Comparison with optical mass profiles in this direction suggests significant departures from HE, consistent with bulk gas compression and decompression due to sloshing on ∼15 kpc scales; this effect disappears in the NW direction, where the emission is smooth and extended. In this sector we find consistent X-ray and optical mass profiles, suggesting that the hot halo is not responding to strong nongravitational forces. | en_US |
dc.language.iso | eng | en_US |
dc.title | Constraining the Physical State of the Hot Gas Halos in NGC 4649 and NGC 5846 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aa7897 | en_US |
dc.identifier.scopus | 2-s2.0-85026411808 | en_US |
dc.identifier.isi | 000405652800005 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aa7897 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 844 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 5 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017ApJ...844....5P | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0002-5646-2410 | - |
crisitem.author.orcid | 0000-0002-0227-502X | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Paggi_2017_ApJ_844_5.pdf | Pdf editoriale | 8.89 MB | Adobe PDF | View/Open |
Page view(s)
40
checked on Apr 23, 2024
Download(s)
14
checked on Apr 23, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.