MaStar

MaNGA stellar library

[MaStar @MaStar_library]

This is our very first release of the library, as part of @sdssurveys #dr15. We are releasing 8646 high quality, high S/N, per-visit spectra for 3321 unique stars. Here is an H-R diagrams for the stars, color-coded by metallicities.

[MaStar @MaStar_library]

#DR17 is live! All of MaStar data are now available for you to explore!

[Sloan Digital Sky Surveys @sdssurveys]

And we’re live! Huge thank you to the whole SDSS team: now go check out our #DR17 data at https://t.co/9tF8KhBs2e. And read our DR17 data release paper: https://t.co/F471tszR42

[MaStar @MaStar_library]

Expecting the SDSS DR17 to happen in the next 24 hours, including all MaStar data.

[APOGEE Survey @APOGEEsurvey]

https://t.co/DuHz0zodim

@sdsssurveys #DR17 is here!

[MaStar @MaStar_library]

Check out #DR16 for new data from @eBOSSurvey and @APOGEEsurvey . There are no new data for @MaNGASurvey and @MaStar_library in this DR. But we are preparing a big release in the next DR.

[MaStar @MaStar_library]

SDSS #DR16 is live!

[Sloan Digital Sky Surveys @sdssurveys]

And we're live!!! #DR16 now available https://t.co/7I3LLQPPul, with huge thanks to the whole SDSS team!

[MaStar @MaStar_library]

@jkarpin2 @sdssurveys We haven't classified the subclasses yet. The photometry data are available in the PSFMAG column in the mastarall table. Though the filters are not always ugriz. Some photometry come from PS1, APASS, and Gaia (in future release). See documentation: https://t.co/S311tk7fps

[MaStar @MaStar_library]

This is our very first release of the library, as part of @sdssurveys #dr15. We are releasing 8646 high quality, high S/N, per-visit spectra for 3321 unique stars. Here is an H-R diagrams for the stars, color-coded by metallicities.

[MaStar @MaStar_library]

@sdssurveys @StarryNate @coreyspowell @universityofky Blue horizontal branch stars are old and have subsolar metallicity.
The F subdwarfs are near the main-sequence turn-off. We try to include stars with different metallicities evenly, weighting the rarer stars more heavily to get a bit of everything. Not a volume-limited sample.

[MaStar @MaStar_library]

@sdssurveys @StarryNate @coreyspowell @universityofky The big blue circles overlapping the hot end of the main sequence are not main sequence stars. They are blue horizontal branch stars. They overlap the main sequence in temperature and luminosity space, but have lower mass and bigger radius, hence lower surface gravity.

[MaStar @MaStar_library]

@jkarpin2 @sdssurveys That is right. We don't have input parameters for everything. Still working on getting parameters for them in a uniform manner.

[Brian Cherinka @havok2063]

Check out @sdssurveys #dr15 and the new paper about @Marvin_SDSS, https://t.co/AgnKygIIfC. For more in the world of SDSS in astronomy, https://t.co/QCvxb9Qrak and https://t.co/ycN3nsRY8F.

[MaStar @MaStar_library]

This is @yanrenbin, tweeting for you today as @MaStar_library . Happy Data Release #dr15 day!

[Renbin Yan @yanrenbin]

Screenshot from @Marvin_SDSS . Check out our data quality at 2.5 times the effective radius in this galaxy. The Halpha flux is 5x10^(-18) erg/s/cm^2 in that 0.5x0.5 square arcsec spaxel. And look at the asymmetry in the Halpha map!

[MaStar @MaStar_library]

As you check out stellar spectra, you should also meet @Marvin_SDSS , which is a new visualization tool for galaxy datacubes from @MaNGASurvey .

[Sloan Digital Sky Surveys @sdssurveys]

Best way to explore @MaNGASurvey data? Ask @Marvin_SDSS, our brandnew visualisation and analysis webpage and tool. Let's get started with Marvin web: https://t.co/RqD49Wn9pB #dr15

[MaStar @MaStar_library]

Trying to cover as wide a stellar parameter space as possible. Here is a comparison to the MILES library. We are still improving our coverage in current observations. Trying to do even better.

[MaStar @MaStar_library]

#dr15 is now live!!! Go get the newest @sdssurveys data, including data from @MaStar_library . https://t.co/CK5zYqRRJP

[MaStar @MaStar_library]

Spectrophotometric calibration compared to photometry.