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List of ADS links regarding cloud | List of Simbad links regarding cloud
Reference L1 links: Text Reference L2 links: Text
Figures Figures
Tables Tables


Key:
D = Detected
ND = Not Detected
(---) = no observation made
Core L1228
Core Name RA (J2000) Dec (J2000) d (pc) Size
(arcmin^2)
Continuum IRAS
source
hms deg'" 1100850450
L1228 20 57 11.81 77 35 47.9 300 5 x 5 --- --- --- 20582+7724
Images
DSS-2 (B Band)

DSS-2 (I band)

IRSA

Post-Launch Infrared

IPAC

From Reference:
"Dense Cores in Dark Clouds. XIV. N2H+ (1-0) maps of Dense Cloud Cores"
by Paola Caselli, Priscilla J. Benson, Philip C. Myers, and Mario Tafalla
Additional Maps and Images

Average N2H+ (1-0) spectra of core, obtained by summing all the spectra inside the half-maximum map contour. The spectrum is in antenna temperature units.



Maps of the N2H+ (1-0) intensity integrated over the seven hyperfine components. The contours and the gray scale represent 20%, 35%, 50%, 35%, 85%, and 90% of the map peak. The thick contour is the half-maximum (50%) level, which defines the core size. The stars indicate the location of the associated infrared source detected by IRAS.



N2H+ (1-0) integrated intensity maps of those cores where "local" velocity gradients have been calculated. The gray-scale levels represent 30%, 50%, 70%, and 90% of the map peak. Small dots mark the position of observed spectra where the determination of V LSR from the hfs fit has been possible. The thin arrows show the magnitude and the direction of the velocity gradient calculated by applying the least-squares fitting routine to the grid of positions centered on the corresponding arrow. The thick arrow in the bottom of the panel represents the total velocity gradient.



Map of line width (gray scale) overlapped with integrated intensity map (contours; levels are 30%, 50%, 70%, and 90% of the peak). Gray contours range from vmin to vmax in steps of 2 where is the mean line width error in the selected positions. Gray areas enclose all the points with v values between two adjacent gray contours. The dots mark the positions that have been used in the v maps (i.e., where v/v 3 and I/I 5). Values of vmin, vmax, and 2 (in units of km s-1) in L1228 are as follows: 0.32, 1.28, and 0.21