@article{
 title = {ASCA Compilation of X-Ray Properties of Hot Gas in Elliptical Galaxies and Galaxy Clusters: Two Breaks in the Temperature Dependences},
 type = {article},
 year = {2004},
 identifiers = {[object Object]},
 keywords = {X-rays: ISM,X-rays: galaxies: clusters,cD,galaxies: clusters: general,galaxies: elliptical and lenticular},
 pages = {965-1009},
 volume = {56},
 websites = {https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/pasj/56/6/10.1093_pasj_56.6.965/5/pasj56-0965.pdf?Expires=1501188886&Signature=YAEmewqMdvlv~mWgFy4qzkFJbiQA9vo8-n~yHKlZDK~HOD3cA3U~nQq6px3Pw-aI~l8zdR7eqHjaOKel7GOu3i4k0MU~xrO1mPYGHKOFrNo1},
 id = {f7ff8063-a30e-3f90-a4e2-5d4365778e02},
 created = {2017-07-26T19:03:20.825Z},
 accessed = {2017-07-26},
 file_attached = {true},
 profile_id = {d9ca9665-cda3-3617-b3e8-ecfc7a8d9739},
 group_id = {5a95a0b6-1946-397c-b16a-114c6fdf3127},
 last_modified = {2017-07-26T20:40:32.647Z},
 tags = {beta model,image processing,temperature size relation,x-ray halo size},
 read = {true},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Fukazawa2004},
 folder_uuids = {a55b3938-9553-4705-9661-67c5f054d79a},
 private_publication = {false},
 abstract = {Utilizing ASCA archival data of about 300 objects of elliptical galaxies, groups, and clusters of galaxies, we performed systematic measurements of the X-ray properties of hot gas in their systems, and compiled them in this paper. The steepness of the luminosity--temperature (LT) relation, $L_\rm X\propto(kT)^\alpha$, in the range of $kT=$1.5--15 keV is $\alpha=3.17\pm0.15$, consistent with previous measurements. In the relation, we find two breaks at around ICM temperatures of 1 keV and 4 keV: $\alpha=2.34\pm0.29$ above 4 keV, $3.74\pm0.32$ in 1.5--5 keV, and $4.03\pm1.07$ below 1.5 keV. Such two breaks are also evident in the temperature and size relation. The steepness in the LT relation at $kT>4$ keV is consistent with the scale-relation derived from the CDM model, indicating that the gravitational effect is dominant in richer clusters, while poorer clusters suffer non-gravity effects. The steep LT relation below 1 keV is almost attributed to X-ray faint systems of elliptical galaxies and galaxy groups. We found that the ICM mass within the scaling radius $R_1500$ follows the relation of $M_\rm gas\propto T^2.33\pm0.07$ from X-ray faint galaxies to rich clusters. Therefore, we speculate that even such X-ray faint systems contain a large-scale hot gas, which is too faint to detect.},
 bibtype = {article},
 author = {Fukazawa, Yasushi and Makishima, Kazuo and Ohashi, Takaya},
 journal = {Publications of the Astronomical Society of Japan},
 number = {6}
}

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The steepness of the luminosity--temperature (LT) relation, $L_\\rm X\\propto(kT)^\\alpha$, in the range of $kT=$1.5--15 keV is $\\alpha=3.17\\pm0.15$, consistent with previous measurements. In the relation, we find two breaks at around ICM temperatures of 1 keV and 4 keV: $\\alpha=2.34\\pm0.29$ above 4 keV, $3.74\\pm0.32$ in 1.5--5 keV, and $4.03\\pm1.07$ below 1.5 keV. Such two breaks are also evident in the temperature and size relation. The steepness in the LT relation at $kT>4$ keV is consistent with the scale-relation derived from the CDM model, indicating that the gravitational effect is dominant in richer clusters, while poorer clusters suffer non-gravity effects. The steep LT relation below 1 keV is almost attributed to X-ray faint systems of elliptical galaxies and galaxy groups. We found that the ICM mass within the scaling radius $R_1500$ follows the relation of $M_\\rm gas\\propto T^2.33\\pm0.07$ from X-ray faint galaxies to rich clusters. Therefore, we speculate that even such X-ray faint systems contain a large-scale hot gas, which is too faint to detect.","bibtype":"article","author":"Fukazawa, Yasushi and Makishima, Kazuo and Ohashi, Takaya","journal":"Publications of the Astronomical Society of Japan","number":"6","bibtex":"@article{\n title = {ASCA Compilation of X-Ray Properties of Hot Gas in Elliptical Galaxies and Galaxy Clusters: Two Breaks in the Temperature Dependences},\n type = {article},\n year = {2004},\n identifiers = {[object Object]},\n keywords = {X-rays: ISM,X-rays: galaxies: clusters,cD,galaxies: clusters: general,galaxies: elliptical and lenticular},\n pages = {965-1009},\n volume = {56},\n websites = {https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/pasj/56/6/10.1093_pasj_56.6.965/5/pasj56-0965.pdf?Expires=1501188886&Signature=YAEmewqMdvlv~mWgFy4qzkFJbiQA9vo8-n~yHKlZDK~HOD3cA3U~nQq6px3Pw-aI~l8zdR7eqHjaOKel7GOu3i4k0MU~xrO1mPYGHKOFrNo1},\n id = {f7ff8063-a30e-3f90-a4e2-5d4365778e02},\n created = {2017-07-26T19:03:20.825Z},\n accessed = {2017-07-26},\n file_attached = {true},\n profile_id = {d9ca9665-cda3-3617-b3e8-ecfc7a8d9739},\n group_id = {5a95a0b6-1946-397c-b16a-114c6fdf3127},\n last_modified = {2017-07-26T20:40:32.647Z},\n tags = {beta model,image processing,temperature size relation,x-ray halo size},\n read = {true},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {Fukazawa2004},\n folder_uuids = {a55b3938-9553-4705-9661-67c5f054d79a},\n private_publication = {false},\n abstract = {Utilizing ASCA archival data of about 300 objects of elliptical galaxies, groups, and clusters of galaxies, we performed systematic measurements of the X-ray properties of hot gas in their systems, and compiled them in this paper. 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