Title: The Herschel Fornax Cluster Survey II: FIR properties of optically-selected Fornax cluster galaxies Show Chinese title

Title: 赫歇尔室女座星系团巡天 II：光学选择的室女座星系团星系的远红外特性

Abstract: The $Herschel$ Fornax Cluster Survey (HeFoCS) is a deep, far-infrared (FIR) survey of the Fornax cluster. The survey is in 5 $Herschel$ bands (100 - 500 $\mu$m) and covers an area of 16 deg$^2$ centred on NGC1399. This paper presents photometry, detection rates, dust masses and temperatures using an optically selected sample from the Fornax Cluster Catalogue (FCC). Our results are compared with those previously obtained using data from the $Herschel$ Virgo Cluster Survey (HeViCS). In Fornax, we detect 30 of the 237 (13%) optically selected galaxies in at least one $Herschel$ band. The global detection rates are significantly lower than Virgo, reflecting the morphological make up of each cluster - Fornax has a lower fraction of late-type galaxies. For galaxies detected in at least 3 bands we fit a modified blackbody with a $\beta = 2$ emissivity. Detected early-type galaxies (E/S0) have a mean dust mass, temperature, and dust-to-stars ratio of $\log_{10}(<M_{dust}>/\mathrm{M_{\odot}}) = 5.82 \pm 0.20$, $<T_{dust}> = 20.82 \pm 1.77$K, and $\log_{10}(M_{dust}/M_{stars}) = -3.87 \pm 0.28$, respectively. Late-type galaxies (Sa to Sd) have a mean dust mass, temperature, and dust-to-stars ratio of $\log_{10}(<M_{dust}>/\mathrm{M_{\odot}}) = 6.54 \pm 0.19$, $<T_{dust}> = 17.47 \pm 0.97$K, and $\log_{10}(M_{dust}/M_{stars}) = -2.93 \pm 0.09$, respectively. The different cluster environments seem to have had little effect on the FIR properties of the galaxies and so we conclude that any environment dependent evolution, has taken place before the cluster was assembled. Show Chinese abstract

Abstract: The $Herschel$ Fornax Cluster Survey (HeFoCS) is a deep, far-infrared (FIR) survey of the Fornax cluster. The survey is in 5 $Herschel$ bands (100 - 500 $\mu$m) and covers an area of 16 deg$^2$ centred on NGC1399. This paper presents photometry, detection rates, dust masses and temperatures using an optically selected sample from the Fornax Cluster Catalogue (FCC). Our results are compared with those previously obtained using data from the $Herschel$ Virgo Cluster Survey (HeViCS). In Fornax, we detect 30 of the 237 (13%) optically selected galaxies in at least one $Herschel$ band. The global detection rates are significantly lower than Virgo, reflecting the morphological make up of each cluster - Fornax has a lower fraction of late-type galaxies. For galaxies detected in at least 3 bands we fit a modified blackbody with a $\beta = 2$ emissivity. 早期类型星系（E/S0）的平均尘埃质量、温度和尘埃与恒星质量比分别为$\log_{10}(<M_{dust}>/\mathrm{M_{\odot}}) = 5.82 \pm 0.20$、$<T_{dust}> = 20.82 \pm 1.77$K 和$\log_{10}(M_{dust}/M_{stars}) = -3.87 \pm 0.28$。 晚型星系（Sa 到 Sd）的平均尘埃质量、温度和尘埃与恒星质量比分别为$\log_{10}(<M_{dust}>/\mathrm{M_{\odot}}) = 6.54 \pm 0.19$、$<T_{dust}> = 17.47 \pm 0.97$K 和$\log_{10}(M_{dust}/M_{stars}) = -2.93 \pm 0.09$。 不同的星系团环境似乎对星系的远红外特性影响不大，因此我们得出结论，任何与环境相关的演化都发生在星系团形成之前。