查看“ALFALFA and MaNGA”的源代码


Here, I used the v1_2_0 version catalog of MaNGA "MaNGA_targets_extNSA_tiled.fits" and <math>\alpha</math>40 of ALFALFA.[http://arecibo.tc.cornell.edu/hiarchive/alfalfa/]
I also supplemented the SDSS information to ALFALFA <math>\alpha</math>40 catalog through PhotoObjID. 

To match these two catalogs, I chosed "RA"&"DEC" in MaNGA catalog, and "ra"&"dec" given by SDSS which had been supplemented to ALFALFA catalog. I did not use "RAdeg_OC" and "DECdeg_OC" in the ALFALFA catalog because they are different with the SDSS ra & dec for the same PhotoObjID object. It could because that the SDSS catalog has changed the galaxy properties a little bit after DR7, ALFALFA might used the old value (DR7).

*Download the combined catalogs: [[File:manga_alfalfa_sdssdr7.txt]]


*I got 2300 matched sources within 3", the spatial distribution is as follows.
[[File:spacedistrib_magalf.jpg]]

*The stellar mass distribution
[[File:Msdistrib_magalf.jpg]]

*The redshift distribtuion
[[File:zdistrib_magalf.jpg]]

*The r-band petromag r90/r50 distribution
[[File:r90r50distrib_magalf.jpg]]