![]() We also find signs of another clump (the SW clump) at the southwest corner of the host galaxy, and the two clumps may share the same origin of gas accretion. This may imply that the galaxy is experiencing an accretion of cold gas, instead of a merger event involving galaxies with significant preexisting old stars. After removing the underlying host component, we find that the spectrum of the “pure” clump can match very well with a modeled spectrum containing a stellar population of the young stars (≤7 Myr) only. Together with the metallicity drop of the NE clump, it suggests that the NE clump likely has an external origin, such as gas accretion or galaxy interaction, rather than an internal origin, such as an H II complex in the disk. The kinematics of the gas in the NE clump also seems to be detached from the host BCD galaxy. This galaxy has a distinct off-centered blue clump to the northeast (the NE clump) that shows low metallicity and enhanced star formation. In this paper, we report the detection of a possible ongoing gas accretion event in a blue compact dwarf (BCD) galaxy, MaNGA 8313-1901, observed by the Mapping Nearby Galaxies and Apache Point Observatory (MaNGA) program. Gas accretion is an important process in the evolution of galaxies, but it has limited direct observational evidences. The wavelength calibration of the MaNGA data is accurate to 5 km/s rms, with a median spatial resolution of 2.54 arcsec FWHM (1.8 kpc at the median redshift of 0.037) and a median spectral resolution of sigma = 72 km/s. For the 1390 galaxy data cubes released in Summer 2016 as part of SDSS-IV Data Release 13 (DR13), we demonstrate that the MaNGA data have nearly Poisson-limited sky subtraction shortward of ~ 8500 Angstroms and reach a typical 10-sigma limiting continuum surface brightness mu = 23.5 AB/arcsec^2 in a five arcsec diameter aperture in the g band. In this contribution, we describe the MaNGA Data Reduction Pipeline (DRP) algorithms and centralized metadata framework that produces sky-subtracted, spectrophotometrically calibrated spectra and rectified 3-D data cubes that combine individual dithered observations. Comprising 174 individually pluggable science and calibration IFUs with a near-constant data stream, MaNGA is expected to obtain ~ 100 million raw-frame spectra and ~ 10 million reduced galaxy spectra over the six-year lifetime of the survey. With a spectral coverage of 3622 - 10,354 Angstroms and an average footprint of ~ 500 arcsec^2 per IFU the scientific data products derived from MaNGA will permit exploration of the internal structure of a statistically large sample of 10,000 low redshift galaxies in unprecedented detail. Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is an optical fiber-bundle integral-field unit (IFU) spectroscopic survey that is one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV). Manga cover is required something wrong Modify successfully Old password is wrong The size or type of profile is not right Follower Remove The blacklist is empty like my comment: Post You haven't follow anybody yet You have no follower yet You've no message. Delete successfully! At least one picture Your haven't followed any club Follow Club * Manga name can't be empty. Are you sure to cancel publishing? Publish * Manga name has existed. ![]() Rate isn't right Size isn't right Please upload 1000*600px banner image We have sent a new password to your registered Email successfully! Please check your Email, Or send again after 60 seconds! Are you sure to delete? Content can't be empty Title can't be empty Are you sure to delete? Are you sure to cancel publishing it? Your manga won\'t show to anyone after canceling publishing. GIF Image larger than 300*300px Delete successfully! Remove successfully! Copy Link Original No more data. Picture's max size Success Warn Oops! Something wrong~ Transmit successfully report Transmit Show More Help Followed Are you sure to delete? Cancel Report No more comments Leave reply Add picture Only.
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