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J/ApJ/706/693         X-ray sources in NGC 5866                      (Li+, 2009)

Dynamic S0 galaxies: a case study of NGC 5866. Li J.-T., Wang Q.D., Li Z., Chen Y. <Astrophys. J., 706, 693-704 (2009)> =2009ApJ...706..693L
ADC_Keywords: Galaxies, nearby ; X-ray sources Keywords: galaxies: elliptical and lenticular, cD - galaxies: general - galaxies: individual (NGC 5866) - galaxies: ISM Abstract: S0 galaxies are often thought to be passively evolved from spirals after star formation is quenched. To explore what is actually occurring in such galaxies, we present a multi-wavelength case study of NGC 5866 - a nearby edge-on S0 galaxy in a relatively isolated environment. This study shows strong evidence for dynamic activities in the interstellar medium, which are most likely driven by supernova explosions in the galactic disk and bulge. Understanding these activities can have strong implications for studying the evolution of such galaxies. We utilize Chandra, Hubble Space Telescope, and Spitzer data as well as ground-based observations to characterize the content, structure, and physical state of the medium and its interplay with the stellar component in NGC 5866. We reveal the presence of diffuse X-ray-emitting hot gas, which extends as far as 3.5kpc away from the galactic plane and can be heated easily by Type Ia SNe in the bulge. Description: The Chandra/ACIS observation of NGC 5866 was taken on 2002 November 14. We reprocess the archived data for our study. See Figure 1 for the Chandra/ACIS-S image of NGC 5866 in the 0.3-7keV band and its detected sources listed in table 2. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 67 71 Chandra source list
See also: B/chandra : The Chandra Archive Log (CXC, 1999-) J/ApJS/192/10 : Chandra ACIS survey in 383 nearby galaxies. I. (Liu, 2011) J/ApJ/668/209 : HST photometry of NGC 5866 globulars (Cantiello+, 2007) J/A+A/405/5 : Catalogue of ISM content of normal galaxies (Bettoni+, 2003) J/ApJ/574/258 : X-ray-emitting young stars in the Orion nebula (Feigelson+, 2002) J/MNRAS/328/461 : X-ray luminosities of early-type galaxies (O'Sullivan+, 2001) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- [LWL2009] Running index number 4- 22 A19 --- CXOU Chandra X-ray Observatory source name (JHHMMSS.ss+DDMMSS.s; <CXOU JHHMMSS.s+DDMMSS> in Simbad) 24- 26 F3.1 arcsec e_pos The 1sigma position uncertainty (1) 28- 32 F5.2 ct/ks CR On-axis broad-band count rate (2) 34- 37 F4.2 ct/ks e_CR Uncertainty in CR 39- 43 F5.2 --- HR ? First hardness ratio (3) 45- 48 F4.2 --- e_HR ? Uncertainty in HR 50- 54 F5.2 --- HR1 ? Second hardness ratio (3) 56- 59 F4.2 --- e_HR1 ? Uncertainty in HR1 61- 67 A7 --- Flag Most accurate positions (4)
Note (1): Calculated from the maximum likelihood centroiding and an approximate off-axis angle (r) dependent systematic error 0.2+1.4(r/8')2 (an approximation to Fig. 4 of Feigelson et al. 2002, Cat. J/ApJ/574/258), which are added in quadrature. Note (2): The sum of the exposure-corrected count rates in the four bands (0.3-0.7keV (S1), 0.7-1.5keV (S2), 1.5-3keV (H1), and 3-7keV (H2)). Note (3): Defined as HR=((H-S2))/((H+S2)) and HR1=((S2-S1))/(S) where S1=0.3-0.7keV, S2=0.7-1.5keV, H=1.5-7keV, S=0.3-1.5keV. Listed only for values with uncertainties less than 0.2. Note (4): The label mark the band in which a source is detected with the most accurate position that is adopted in the CXOU column as follows: S = soft band (0.3-1.5keV) H = hard band (1.5-7keV) B = broad band (0.3-7keV)
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 14-Dec-2011
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