@article{
 title = {The Nature of Dark Matter in Elliptical Galaxies:Chandra Observations of NGC 4636},
 type = {article},
 keywords = {Subject headings,X-rays,dark matter,elliptical and lentic-ular,galaxies,individual (NGC 4636),structure},
 websites = {http://cds.cern.ch/record/574989/files/0208090.pdf},
 id = {f0411d08-8c77-3550-b506-9884a95db1b1},
 created = {2017-05-09T23:04:56.149Z},
 accessed = {2017-05-09},
 file_attached = {true},
 profile_id = {d9ca9665-cda3-3617-b3e8-ecfc7a8d9739},
 group_id = {5a95a0b6-1946-397c-b16a-114c6fdf3127},
 last_modified = {2017-07-29T20:19:07.865Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Loewenstein},
 folder_uuids = {a55b3938-9553-4705-9661-67c5f054d79a},
 private_publication = {false},
 abstract = {We determine the total enclosed mass profile from 0.7 to 35 kpc in the ellip-tical galaxy NGC 4636 based on the hot interstellar medium temperature profile measured using the Chandra X-ray Observatory, and other X-ray and optical data. The total mass increases as r 1.2 to a good approximation over this range in radii, attaining a total of ∼ 1.5 × 10 12 M (corresponding to M tot /L V = 40) at 35 kpc. We find that at least half, and as much as 80%, of the mass within the optical half-light radius is non-luminous, implying that NGC 4636 has an exceptionally low baryon fraction. The large inferred dark matter concentration and central dark matter density, consistent with the upper end of the range ex-pected for standard cold dark matter halos, imply that mechanisms proposed to explain low dark matter densities in less massive galaxies (e.g., self-interacting dark matter, warm dark matter, explosive feedback) are not effective in ellipti-cal galaxies (and presumably, by extension, in galaxy clusters). The composite (black hole, stars, and dark matter) mass distribution has a generally steep slope with no core, consistent with gravitational lensing studies.},
 bibtype = {article},
 author = {Loewenstein, Michael and Mushotzky, Richard F.}
}

{"_id":"STMiJTAELjNWADDpc","bibbaseid":"loewenstein-mushotzky-thenatureofdarkmatterinellipticalgalaxieschandraobservationsofngc4636","downloads":0,"creationDate":"2017-08-30T17:46:18.699Z","title":"The Nature of Dark Matter in Elliptical Galaxies:Chandra Observations of NGC 4636","author_short":["Loewenstein, M.","Mushotzky, R., F."],"year":null,"bibtype":"article","biburl":null,"bibdata":{"title":"The Nature of Dark Matter in Elliptical Galaxies:Chandra Observations of NGC 4636","type":"article","keywords":"Subject headings,X-rays,dark matter,elliptical and lentic-ular,galaxies,individual (NGC 4636),structure","websites":"http://cds.cern.ch/record/574989/files/0208090.pdf","id":"f0411d08-8c77-3550-b506-9884a95db1b1","created":"2017-05-09T23:04:56.149Z","accessed":"2017-05-09","file_attached":"true","profile_id":"d9ca9665-cda3-3617-b3e8-ecfc7a8d9739","group_id":"5a95a0b6-1946-397c-b16a-114c6fdf3127","last_modified":"2017-07-29T20:19:07.865Z","read":false,"starred":false,"authored":false,"confirmed":"true","hidden":false,"citation_key":"Loewenstein","folder_uuids":"a55b3938-9553-4705-9661-67c5f054d79a","private_publication":false,"abstract":"We determine the total enclosed mass profile from 0.7 to 35 kpc in the ellip-tical galaxy NGC 4636 based on the hot interstellar medium temperature profile measured using the Chandra X-ray Observatory, and other X-ray and optical data. The total mass increases as r 1.2 to a good approximation over this range in radii, attaining a total of ∼ 1.5 × 10 12 M (corresponding to M tot /L V = 40) at 35 kpc. We find that at least half, and as much as 80%, of the mass within the optical half-light radius is non-luminous, implying that NGC 4636 has an exceptionally low baryon fraction. The large inferred dark matter concentration and central dark matter density, consistent with the upper end of the range ex-pected for standard cold dark matter halos, imply that mechanisms proposed to explain low dark matter densities in less massive galaxies (e.g., self-interacting dark matter, warm dark matter, explosive feedback) are not effective in ellipti-cal galaxies (and presumably, by extension, in galaxy clusters). The composite (black hole, stars, and dark matter) mass distribution has a generally steep slope with no core, consistent with gravitational lensing studies.","bibtype":"article","author":"Loewenstein, Michael and Mushotzky, Richard F.","bibtex":"@article{\n title = {The Nature of Dark Matter in Elliptical Galaxies:Chandra Observations of NGC 4636},\n type = {article},\n keywords = {Subject headings,X-rays,dark matter,elliptical and lentic-ular,galaxies,individual (NGC 4636),structure},\n websites = {http://cds.cern.ch/record/574989/files/0208090.pdf},\n id = {f0411d08-8c77-3550-b506-9884a95db1b1},\n created = {2017-05-09T23:04:56.149Z},\n accessed = {2017-05-09},\n file_attached = {true},\n profile_id = {d9ca9665-cda3-3617-b3e8-ecfc7a8d9739},\n group_id = {5a95a0b6-1946-397c-b16a-114c6fdf3127},\n last_modified = {2017-07-29T20:19:07.865Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {Loewenstein},\n folder_uuids = {a55b3938-9553-4705-9661-67c5f054d79a},\n private_publication = {false},\n abstract = {We determine the total enclosed mass profile from 0.7 to 35 kpc in the ellip-tical galaxy NGC 4636 based on the hot interstellar medium temperature profile measured using the Chandra X-ray Observatory, and other X-ray and optical data. The total mass increases as r 1.2 to a good approximation over this range in radii, attaining a total of ∼ 1.5 × 10 12 M (corresponding to M tot /L V = 40) at 35 kpc. We find that at least half, and as much as 80%, of the mass within the optical half-light radius is non-luminous, implying that NGC 4636 has an exceptionally low baryon fraction. The large inferred dark matter concentration and central dark matter density, consistent with the upper end of the range ex-pected for standard cold dark matter halos, imply that mechanisms proposed to explain low dark matter densities in less massive galaxies (e.g., self-interacting dark matter, warm dark matter, explosive feedback) are not effective in ellipti-cal galaxies (and presumably, by extension, in galaxy clusters). The composite (black hole, stars, and dark matter) mass distribution has a generally steep slope with no core, consistent with gravitational lensing studies.},\n bibtype = {article},\n author = {Loewenstein, Michael and Mushotzky, Richard F.}\n}","author_short":["Loewenstein, M.","Mushotzky, R., F."],"urls":{"Paper":"http://bibbase.org/service/mendeley/d9ca9665-cda3-3617-b3e8-ecfc7a8d9739/file/5a862d94-e67e-b9b1-5a4d-6902871724a9/The_Nature_of_Dark_Matter_in_Elliptical_GalaxiesChandra_Observations_of_NGC_4636.pdf.pdf","Website":"http://cds.cern.ch/record/574989/files/0208090.pdf"},"bibbaseid":"loewenstein-mushotzky-thenatureofdarkmatterinellipticalgalaxieschandraobservationsofngc4636","role":"author","keyword":["Subject headings","X-rays","dark matter","elliptical and lentic-ular","galaxies","individual (NGC 4636)","structure"],"downloads":0},"search_terms":["nature","dark","matter","elliptical","galaxies","chandra","observations","ngc","4636","loewenstein","mushotzky"],"keywords":["subject headings","x-rays","dark matter","elliptical and lentic-ular","galaxies","individual (ngc 4636)","structure"],"authorIDs":[]}