Drew Chojnowski » Galactic Group

Drew Chojnowski

Graduate Student NMSUAstronomy
575.646.4813 Personal page

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Biographical Info


I grew up in Fort Worth, TX, where I attended R.L. Paschal High School. After briefs stints at Louisiana State University (LSU) and Tarrant County College (TCC), I graduated from Texas Christian University (TCU) in 2011 with B.S. in physics & astronomy. From 2011-present, I have worked as plate design coordinator for the Apache Point Observatory Galactic Evolution Experiment (APOGEE), one of four sub-surveys of the third installment of the Sloan Digital Sky Survey (SDSS). My job is to run and maintain target selection codes for selecting red giant star targets for APOGEE. I provide target lists for each plate, which then get translated into physical fiber holes drilled into the aluminum plates that are plugged with fibers and loaded into the focal plane of the SDSS 2.5m telescope for APOGEE observations. I was stationed at the University of Virginia (UVA) in Charlottesville, VA for the first three years of my APOGEE work, but in June 2014 I relocated to New Mexico State University (NMSU) in Las Cruces, NM. Finally, I started astronomy graduate school at NMSU in August 2015.

I’m interested in a wide range of research, from the supermassive black holes in the centers of galaxies to individual weird stars in our own Milky Way Galaxy. Simply put, I use spectroscopy to study emission line objects. Chances are good that I’m working on an SDSS-related project at any given point in time.

My first research project dealt a large sample of blue, star-forming galaxies culled from the SDSS DR1-7. Despite having very blue optical colors, more typical of blue dwarf galaxies, the galaxies in our sample had absolute magnitudes clearly in the non-dwarf regime. I worked on this project with Dr. Michael P. Fanelli and Dr. Pamela Marcum.

My second research project started with an REU internship under Dr. Bill Keel at the University of Alabama. Hanny’s Voorwerp had recently been discovered in SDSS images, and my project for the summer was basically to try and find other Voorwerp-like objects in SDSS data. This is an ongoing project with several papers already published.

My third research project focused on deriving bulk radial velocities (RVs) of Galactic open clusters via multi-fiber spectroscopy. This was a continuation of thesis work by Dr. Peter Frinchaboy of TCU, and my task was reduction and RV extraction of similar data taken after his PhD work. The results will likely be used in a future paper combining RVs from my work and from the APOGEE survey.

My fourth research project deals with APOGEE spectroscopy of B-type emission line stars. I’ve authored two papers on this topic, and have a few more related paper drafts in progress.


31. IN-SYNC VI. Identification and Radial Velocity Extraction for 100+ Double-Lined Spectroscopic Binaries in the APOGEE/IN-SYNC Fields

30. High-resolution H-band Spectroscopy of Be Stars with SDSS-III/APOGEE. II. Line Profile and Radial Velocity Variability

29. Chemical tagging with APOGEE: discovery of a large population of N-rich stars in the inner Galaxy

28. An H-Band Survey of B[e] Stars With the APOGEE Spectrograph

27. Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies and the Distant Universe

26. Fading AGN Candidates: AGN Histories and Outflow Signatures

25. Identification of Neodymium in the Apogee H-Band Spectra

24. The Thirteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey MApping Nearby Galaxies at Apache Point Observatory

23. Companions to APOGEE Stars. I. A Milky Way-spanning Catalog of Stellar and Substellar Companion Candidates and Their Diverse Hosts
Nicholas W. Troup, David L. Nidever, Nathan De Lee, Joleen Carlberg, Steven R. Majewski, Martin Fernandez, Kevin Covey, S. Drew Chojnowski; and many more coauthors
*AJ, Volume 151, Issue 3, article id. 85, 25 pp., 03/2016

22. The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
Steven R Majewski; Ricardo P. Schiavon; Peter M. Frinchaboy; Carlos Allende Prieto; Robert Barkhouser; Dmitry Bizyaev; Basil Blank; Sophia Brunner; Adam Burton; Ricardo Carrera; S. Drew Chojnowski; and many more coauthors
*eprint arXiv:1509.05420, 09/2015

21. Companions to APOGEE Stars I: A Milky Way-Spanning Catalog of Stellar and Substellar Companion Candidates and their Diverse Hosts
Nicholas W. Troup; David L. Nidever; Nathan De Lee; Joleen Carlberg; Steven R. Majewski; Martin Fernandez; Kevin Covey; S. Drew Chojnowski; and 18 coauthors
*eprint arXiv:1601.00688, 01/2016

20. The SDSS-III APOGEE Spectral Line List for H-band Spectroscopy
M. Shetrone; D. Bizyaev; J.E. Lawler; C. Allende Prieto; J.A. Johnson; V. V. Smith; K. Cunha; A. E. García Pérez; Sz. Mészáros; J. Sobeck; O. Zamora; D. A. García-Hernández; D. Souto; D. Chojnowski; and 3 coauthors
*AJss, Volume 221, Issue 2, article id. 24, 14 pp., 12/2015

19. IN-SYNC IV – The Young Stellar Population in the Orion A Molecular Cloud
Nicola Da Rio; Jonathan C. Tan; Kevin R. Covey; Michiel Cottaar; Jonathan B. Foster; Nicholas C. Cullen; John J Tobin; Jinyoung S. Kim; Michael R. Meyer; David L. Nidever; Keivan G. Staussun; S. Drew Chojnowski; and 5 coauthors
*eprint arXiv:1511.04147, 11/2015

18. Abundances, Stellar Parameters, and Spectra from the SDSS-III/APOGEE Survey
Jon A. Holtzman; Matthew Shetrone; Jennifer A. Johnson; Carlos Allende Prieto; Friedrich Anders; Brett Andrews; Timothy C. Beers; Dmitry Bizyaev; Michael R. Blanton; Jo Bovy; Ricardo Carrera; S. Drew Chojnowski; and 31 coauthors
*AJ, Volume 150, Issue 5, article id. 148, 27 pp., 11/2015

17. An Infrared Diffuse Circumstellar Band? The Unusual 1.5272 Micron DIB in the Red Square Nebula
G. Zasowski; S. Drew Chojnowski; D. G. Whelan; A. S. Miroshnichenko; D. A. Garcia-Hernandez; S. R. Majewski
*ApJ, Volume 811, Issue 2, article id. 119, 8 pp., 10/2015

16. Characterizing the Rigidly Rotating Magnetosphere Stars HD 345439 and HD 23478
J. P. Wisniewski; S. D. Chojnowski; J. R. A. Davenport; J. Bartz; J. Pepper; D.G. Whelan; S.S. Eikenberry; J. R. Lomax, S. R. Majewski, N. D. Richardson; M. Skrutskie
*ApJL, Volume 811, Issue 2, article id. L26, 7 pp., 10/2015

15. The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
304 coauthors
*ApJS, Volume 219, Issue 1, article id. 12, 27 pp.., 07/2015

14. IN-SYNC. III. The Dynamical State of IC 348 – A Super-virial Velocity Dispersion and a Puzzling Sign of Convergence
Michiel Cottaar; Kevin R. Covey; Jonathan B. Foster; Michael R. Meyer; Jonathan C. Tan; David L. Nidever; S. Drew Chojnowski; Nicola da Rio; and 6 coauthors
*ApJ, Volume 807, Issue 1, article id. 27, 19 pp., 07/2015

13. HST Imaging of Fading AGN Candidates. I. Host-galaxy Properties and Origin of the Extended Gas
William C. Keel; Peter W. Maksym; Vardha N. Bennert; Chris J. Lintott; S. Drew Chojnowski; Alexei Moiseev; Aleksandrina Smirnova; Kevin Schawinski; and 6 coauthors
*AJ, Volume 149, Issue 5, article id. 155, 23 pp., 05/2015

12. The APOGEE Spectral Line List for H band Spectroscopy
Matthew Shetrone; Dmitry Bizyaev; James Lawler; Carlos Allende Prieto; Jennifer A. Johnson; Verne Smith; Katia Cunha; Jon Holtzman; Ana Garcia Perez; Szabolcs Meszaros; Jennifer Sobeck; Olga Zamora; Anibal Garcia-Hernandez; Diogo Souto; Drew Chojnowski; Lars Koesterke; Steven Majewski
*eprint arXiv:1502.04080, 02/2015

11. IN-SYNC. II. Virial Stars from Subvirial Cores—the Velocity Dispersion of Embedded Pre-main-sequence Stars in NGC 1333
Jonathan B. Foster; Michiel Cottaar; Kevin R. Covey; Héctor G. Arce; Michael R. Meyer; David L. Nidever; Keivan G. Stassun; Jonathan C. Tan; S. Drew Chojnowski; and 8 coauthors
*ApJ, Volume 799, Issue 2, article id. 136, 12 pp., 02/2015

10. High-Resolution H-Band Spectroscopy of Be Stars With SDSS-III/Apogee: I. New Be Stars, Line Identifications, and Line Profiles
S. Drew Chojnowski; David G. Whelan; John P. Wisniewski; Steven R. Majewski; and 25 coauthors
*AJ, Volume 149, Issue 1, article id. 7, 30 pp., 01/2015

9. IN-SYNC I: Homogeneous Stellar Parameters from High-resolution APOGEE Spectra for Thousands of Pre-main Sequence Stars
Michiel Cottaar; Kevin R. Covey; Michael R. Meyer; David L. Nidever; Keivan G. Stassun; Jonathan B. Foster; Jonathan C. Tan; S. Drew Chojnowski; and 7 coauthors
*ApJ, Volume 794, Issue 2, article id. 125, 18 pp., 10/2014

8. The APOGEE Red-clump Catalog: Precise Distances, Velocities, and High-resolution Elemental Abundances over a Large Area of the Milky Way’s Disk
Jo Bovy; David L. Nidever; Hans-Walter Rix; Léo Girardi; Gail Zasowski; S. Drew Chojnowski; Jon Holtzman; and 44 coauthors
*ApJ, Volume 790, Issue 2, article id. 127, 21 pp., 08/2014

7. The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
238 coauthors
*ApJS, Volume 211, Issue 2, article id. 17, 16 pp., 04/2014

6. Discovery of Two Rare Rigidly Rotating Magnetosphere Stars in the APOGEE Survey
Stephen S. Eikenberry; S. Drew Chojnowski; John Wisniewski; Steven R. Majewski; Matthew Shetrone; David G. Whelan; and 16 coauthors
*ApJL, Volume 784, Issue 2, article id. L30, 5 pp., 04/2014

5. Calibrations of Atmospheric Parameters Obtained from the First Year of SDSS-III APOGEE Observations
Sz. Mészáros; J. Holtzman; A. E. García Pérez; C. Allende Prieto; R. P. Schiavon; S. Basu; D. Bizyaev; W. J. Chaplin; S. D. Chojnowski; and 19 coauthors
*AJ, Volume 146, Issue 5, article id. 133, 19 pp., 11/2013

4. Target Selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
G. Zasowski; Jennifer A. Johnson; P. M. Frinchaboy; S. R. Majewski; D. L. Nidever; H. J. Rocha Pinto; L. Girardi; B. Andrews; S. D. Chojnowski; and 37 coauthors
*AJ, Volume 146, Issue 4, article id. 81, 28 pp., 10/2013

3. The History and Environment of a Faded Quasar: Hubble Space Telescope Observations of Hanny’s Voorwerp and IC 2497
William C. Keel; Chris J. Lintott; Kevin Schawinski; Vardha N. Bennert; Daniel Thomas; Anna Manning; S. Drew Chojnowski; Hanny van Arkel; Stuart Lynn
*AJ, Volume 144, Issue 2, article id. 66, 16 pp., 08/2012

2. The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black hole accretion events
William C. Keel; S. Drew Chojnowski; Vardha N. Bennert; Kevin Schawinski; Chris J. Lintott; Stuart Lynn; Anna Pancoast; Chelsea Harris; A. M. Nierenberg; Alessandro Sonnenfeld; Richard Proctor
*MNRAS, Volume 420, Issue 1, pp. 878-900, 02/2012

1. Galaxy-Scale Clouds of Ionized Gas around AGN
S. Drew Chojnowski; William C. Keel
*JSARA, vol. 5, p. 29-33, 02/2012

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