2023 SDSS-V Collaboration Meeting

Session

Session 7

Aug 2, 2023, 9:00 AM

Gerald D. Fischbach Auditorium/2-GDFA (160 5th Avenue)

Conveners

Session 7

• Sebastián F. Sanchez

42. Calibration of metallicity of M dwarf stars using FGK+M wide binaries

Dan Qiu (REMOTE)

8/2/23, 9:00 AM

In this work, we empirically calibrate the metallicity using wide binaries with a F, G, or K dwarf and a M dwarf companions. With 1409 FGK+M wide binaries well observed by LAMOST, we are able to calibrate M dwarf’s [Fe/H] by using the Stellar LAbel Machine (SLAM) model, which is a data-driven method based on support vector regression. The [Fe/H] labels of the training data are from FGK...

44. How Prevalent is the Alpha-Bimodality in the Local Group?

David Nidever

8/2/23, 9:12 AM

The recent era of large, ground-based abundance surveys has unraveled the chemical structures of our Milky Way galaxy. The most striking abundance feature is the alpha-abundance bimodality. The low-alpha stars are younger (1-8 Gyr) while the high-alpha stars are older (8-12 Gyr) and have a thicker distribution. Interestingly, the APOGEE abundances of the Large and Small Magellanic Clouds do...

45. Mapping the California Cloud's Dynamical Structure with APOGEE

Aidan McBride

8/2/23, 9:24 AM

The internal dynamics of giant molecular clouds (GMCs) are important tracers of their evolutionary history and the processes that cause them to coalesce from the warm neutral ISM. Kinetic tomography, a class of techniques for calculating distance-resolved velocities in the ISM, is an important tool for understanding the kinematics of nearby GMCs. Using the 1.527 micron diffuse interstellar...

46. eROSITA-SDSS Data Level 1

Catarina Aydar

8/2/23, 9:36 AM

Multiwavelength information is crucial for a complete understanding of the Universe. Therefore, SPIDERS (Spectroscopic Identification of ERosita Sources) selected objects identified in X-rays with eROSITA to be observed in the optical domain by SDSS-V. We present the Data Level 1 of the collaboration between SDSS and eROSITA, in which we make available the main features of sources observed in...

47. The Host galaxies stellar populations with Active Galactic Nuclei with the SDSS-V

Hector Ibarra Medel

8/2/23, 9:48 AM

We will present a first study of the host galaxy stellar populations with the SDSS-V. For that objective, we will use optical spectra within a redshift range of 0.1 to 0.9 and retrieve a set of stellar population syntheses to disentangle the non-thermal component arising from the active nucleus from the host galaxy. The analysis tests the feasibility of recovering the stellar masses, star...

48. Finding HII regions

Alejandra Zaavik Lugo-Aranda

8/2/23, 10:00 AM

In this work we present a new tool called pyHIIextractor used to search for HII regions in nearby universe galaxies observed with Integral Field Spectroscopy data. The code extracts the main properties of ionized gas emission lines and the underlying stellar populations. It also models the diffuse ionized gas component and decontaminates the information from the HII regions due to this...

43. KPM: A flexible and data-driven K process model for nucleosynthesis

Emily Griffith

The element abundance pattern seen in Milky Way disk stars is close to two-dimensional, dominated by production from one prompt process and one delayed process. We fit the abundances of 14 elements for 48,659 red-giant stars from APOGEE DR17 using a flexible, data-driven K-process model---dubbed KPM. In our fiducial model, with K=2, each abundance in each star is described as the sum of a...

49. TBD

Zaavik Lugo-Aranda