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Education and qualifications (2)

Pennsylvania State University: University Park, PA, US

2011-08 to 2017-08-01 | Ph.D. in Astronomy & Astrophysics (Astronomy & Astrophysics)
Education
Source: Self-asserted source
Alex Hagen

Harvey Mudd College: Claremont, CA, US

2006-08 to 2010-05 | B.S. in Physics with an Emphasis in Astrophysics (Physics & Astronomy)
Education
Source: Self-asserted source
Alex Hagen

Works (44)

Galaxies of the z ∼ 2 Universe. I. Grism-selected Rest-frame Optical Emission-line Galaxies

The Astrophysical Journal
2019-04-20 | Journal article
Contributors: William P. Bowman; Gregory R. Zeimann; Robin Ciardullo; Caryl Gronwall; Donald P. Schneider; Adam P. McCarron; Laurel H. Weiss; Guang Yang; Alex Hagen
Source: check_circle
Crossref

The Astropy Project: Building an Open-science Project and Status of the v2.0 Core Package

The Astronomical Journal
2018-09 | Journal article
Contributors: Astropy Collaboration; Price-Whelan, A. M.; Sipőcz, B. M.; Günther, H. M.; Lim, P. L.; Crawford, S. M.; Conseil, S.; Shupe, D. L.; Craig, M. W.; Dencheva, N. et al.
Source: check_circle
NASA Astrophysics Data System

The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment

The Astrophysical Journal Supplement Series
2018-04 | Journal article
Contributors: Abolfathi, Bela; Aguado, D. S.; Aguilar, Gabriela; Allende Prieto, Carlos; Almeida, Andres; Ananna, Tonima Tasnim; Anders, Friedrich; Anderson, Scott F.; Andrews, Brett H.; Anguiano, Borja et al.
Source: check_circle
NASA Astrophysics Data System

The Lyα Reference Sample. VIII. Characterizing Lyα Scattering in Nearby Galaxies

The Astrophysical Journal
2018-01 | Journal article
Contributors: Bridge, Joanna S.; Hayes, Matthew; Melinder, Jens; Östlin, Göran; Gronwall, Caryl; Ciardullo, Robin; Atek, Hakim; Cannon, John M.; Gronke, Max; Guaita, Lucia et al.
Source: check_circle
NASA Astrophysics Data System

A Study in Lyman-Alpha

Ph.D. Thesis
2017 | Dissertation or Thesis
Contributors: Hagen, Alex
Source: check_circle
NASA Astrophysics Data System

SDSS-IV MaNGA: Spatially Resolved Star Formation Main Sequence and LI(N)ER Sequence

The Astrophysical Journal
2017-12 | Journal article
Contributors: Hsieh, B. C.; Lin, Lihwai; Lin, J. H.; Pan, H. A.; Hsu, C. H.; Sánchez, S. F.; Cano-Díaz, M.; Zhang, K.; Yan, R.; Barrera-Ballesteros, J. K. et al.
Source: check_circle
NASA Astrophysics Data System

The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

The Astrophysical Journal Supplement Series
2017-12 | Journal article
Contributors: Albareti, Franco D.; Allende Prieto, Carlos; Almeida, Andres; Anders, Friedrich; Anderson, Scott; Andrews, Brett H.; Aragón-Salamanca, Alfonso; Argudo-Fernández, Maria; Armengaud, Eric; Aubourg, Eric et al.
Source: check_circle
NASA Astrophysics Data System

VizieR Online Data Catalog: Properties of emission-line galaxies (Hagen+, 2016)

VizieR Online Data Catalog
2017-10 | Dataset
Contributors: Hagen, A.; Zeimann, G. R.; Behrens, C.; Ciardullo, R.; Grasshorn Gebhardt, H. S.; Gronwall, C.; Bridge, J. S.; Fox, D. B.; Schneider, D. P.; Trump, J. R. et al.
Source: check_circle
NASA Astrophysics Data System

Bayesian Redshift Classification of Emission-line Galaxies with Photometric Equivalent Widths

The Astrophysical Journal
2017-07 | Journal article
Contributors: Leung, Andrew S.; Acquaviva, Viviana; Gawiser, Eric; Ciardullo, Robin; Komatsu, Eiichiro; Malz, A. I.; Zeimann, Gregory R.; Bridge, Joanna S.; Drory, Niv; Feldmeier, John J. et al.
Source: check_circle
NASA Astrophysics Data System

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

The Astronomical Journal
2017-07 | Journal article
Contributors: Blanton, Michael R.; Bershady, Matthew A.; Abolfathi, Bela; Albareti, Franco D.; Allende Prieto, Carlos; Almeida, Andres; Alonso-García, Javier; Anders, Friedrich; Anderson, Scott F.; Andrews, Brett et al.
Source: check_circle
NASA Astrophysics Data System

VizieR Online Data Catalog: SED fitting results of HETDEX pilot survey (Hagen+, 2014)

VizieR Online Data Catalog
2017-06 | Dataset
Contributors: Hagen, A.; Ciardullo, R.; Gronwall, C.; Acquaviva, V.; Bridge, J.; Zeimann, G. R.; Blanc, G. A.; Bond, N. A.; Finkelstein, S. L.; Song, M. et al.
Source: check_circle
NASA Astrophysics Data System

Swift Ultraviolet Survey of the Magellanic Clouds (SUMaC) - I. Shape of the ultraviolet dust extinction law and recent star formation history of the Small Magellanic Cloud

Monthly Notices of the Royal Astronomical Society
2017-04 | Journal article
Contributors: Hagen, Lea M. Z.; Siegel, Michael H.; Hoversten, Erik A.; Gronwall, Caryl; Immler, Stefan; Hagen, Alex
Source: check_circle
NASA Astrophysics Data System

SDSS IV MaNGA: Discovery of an Hα Blob Associated with a Dry Galaxy Pair—Ejected Gas or a “Dark” Galaxy Candidate?

The Astrophysical Journal
2017-03 | Journal article
Contributors: Lin, Lihwai; Lin, Jing-Hua; Hsu, Chin-Hao; Fu, Hai; Huang, Song; Sánchez, Sebastián F.; Gwyn, Stephen; Gelfand, Joseph D.; Cheung, Edmond; Masters, Karen et al.
Source: check_circle
NASA Astrophysics Data System

VizieR Online Data Catalog: Hβ and Lyα emitting galaxies at z~2 (Ciardullo+, 2014)

VizieR Online Data Catalog
2017-02 | Dataset
Contributors: Ciardullo, R.; Zeimann, G. R.; Gronwall, C.; Gebhardt, H.; Schneider, D. P.; Hagen, A.; Malz, A. I.; Blanc, G. A.; Hill, G. J.; Drory, N. et al.
Source: check_circle
NASA Astrophysics Data System

The Physical Properties of z ~ 2 Lyman-alpha Emitters and their Use as Tracers of the Star Forming Galaxy Population

American Astronomical Society Meeting Abstracts #229
2017-01 | Conference abstract
Contributors: Hagen, Alex; Ciardullo, Robin; Gronwall, Caryl; Bridge, Joanna; Gebhardt, Henry; Zeimann, Gregory; HETDEX Team
Source: check_circle
NASA Astrophysics Data System

Swift Ultraviolet Survey of the Magellanic Clouds (SUMaC). I. Shape of the Ultraviolet Dust Extinction Law and Recent Star Formation History of the Small Magellanic Cloud

2016-10 | Journal article
OTHER-ID:

11822358

Contributors: Hagen, Lea M. Z.; Siegel, Michael H.; Hoversten, Erik A.; Gronwall, Caryl; Immler, Stefan; Hagen, Alex
Source: check_circle
NASA Astrophysics Data System

The Astropy Problem

2016-10 | Journal article
OTHER-ID:

11793542

Contributors: Muna, Demitri; Alexander, Michael; Allen, Alice; Ashley, Richard; Asmus, Daniel; Azzollini, Ruyman; Bannister, Michele; Beaton, Rachael; Benson, Andrew; Berriman, G. Bruce et al.
Source: check_circle
NASA Astrophysics Data System

The Rest-Frame Optical Morphology of Emission Line Galaxies at 2 〈 z 〈 3: Evidence for Inside-Out Formation in Low-Mass Galaxies

2016-10 | Journal article
OTHER-ID:

11781335

Contributors: Hagen, Alex; Bond, Nicholas A.; Ciardullo, Robin; Gronwall, Caryl; Gawiser, Eric; Bowman, William; Bridge, Joanna S.; Grasshorn Gebhardt, Henry S.; Schneider, Donald P.
Source: check_circle
NASA Astrophysics Data System

Is the cluster environment quenching the Seyfert activity in elliptical and spiral galaxies?

2016-09 | Journal article
OTHER-ID:

11646711

Contributors: de Souza, R. S.; Dantas, M. L. L.; Krone-Martins, A.; Cameron, E.; Coelho, P.; Hattab, M. W.; de Val-Borro, M.; Hilbe, J. M.; Elliott, J.; Hagen, A.
Source: check_circle
NASA Astrophysics Data System

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

2016-08 | Journal article
OTHER-ID:

11694668

Contributors: SDSS Collaboration; Albareti, Franco D.; Allende Prieto, Carlos; Almeida, Andres; Anders, Friedrich; Anderson, Scott; Andrews, Brett H.; Aragon-Salamanca, Alfonso; Argudo-Fernandez, Maria; Armengaud, Eric et al.
Source: check_circle
NASA Astrophysics Data System

ON THE CLASSIFICATION OF UGC 1382 AS A GIANT LOW SURFACE BRIGHTNESS GALAXY

The Astrophysical Journal
2016-08-01 | Journal article
Contributors: Lea M. Z. Hagen; Mark Seibert; Alex Hagen; Kristina Nyland; James D. Neill; Marie Treyer; Lisa M. Young; Jeffrey A. Rich; Barry F. Madore
Source: check_circle
Crossref

On the Classification of UGC1382 as a Giant Low Surface Brightness Galaxy

2016-07 | Journal article
OTHER-ID:

11618752

Contributors: Hagen, Lea M. Z.; Seibert, Mark; Hagen, Alex; Nyland, Kristina; Neill, James D.; Treyer, Marie; Young, Lisa M.; Rich, Jeffrey A.; Madore, Barry F.
Source: check_circle
NASA Astrophysics Data System

HST Emission Line Galaxies at z ~ 2: Comparing Physical Properties of Lyman Alpha and Optical Emission Line Selected Galaxies

2016-01 | Journal article
OTHER-ID:

11304269

Contributors: Hagen, Alex; Zeimann, Gregory R.; Behrens, Christoph; Ciardullo, Robin; Grasshorn Gebhardt, Henry S.; Gronwall, Caryl; Bridge, Joanna S.; Fox, Derek B.; Schneider, Donald P.; Trump, Jonathan R. et al.
Source: check_circle
NASA Astrophysics Data System
grade
Preferred source (of 2)‎

The SDSS-IV in 2015: Report of the Committee on the Participation of Women in the Sloan Digital Sky Survey

American Astronomical Society Meeting Abstracts #227
2016-01 | Conference abstract
Contributors: Diamond-Stanic, Aleksandar M.; Lucatello, Sara; Aragon-Salamanca, Alfonso; Cherinka, Brian; Cunha, Katia M. L.; Gillespie, Bruce Andrew; Hagen, Alex; Jones, Amy; Kinemuchi, Karen; Lundgren, Britt et al.
Source: check_circle
NASA Astrophysics Data System

Young, Star-forming Galaxies and Their Local Counterparts: The Evolving Relationship of Mass-SFR-Metallicity Since z ̃ 2.1

2016-01 | Journal article
OTHER-ID:

11304207

Contributors: Grasshorn Gebhardt, Henry S.; Zeimann, Gregory R.; Ciardullo, Robin; Gronwall, Caryl; Hagen, Alex; Bridge, Joanna S.; Schneider, Donald P.; Trump, Jonathan R.
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NASA Astrophysics Data System
grade
Preferred source (of 2)‎

The Dust Attenuation Curve versus Stellar Mass for Emission Line Galaxies at z ~ 2

2015-12 | Journal article
OTHER-ID:

11247830

Contributors: Zeimann, Gregory R.; Ciardullo, Robin; Gronwall, Caryl; Bridge, Joanna; Brooks, Hunter; Fox, Derek; Gawiser, Eric; Gebhardt, Henry; Hagen, Alex; Schneider, Donald P. et al.
Source: check_circle
NASA Astrophysics Data System
grade
Preferred source (of 2)‎

Learning from FITS: Limitations in use in modern astronomical research

2015-09 | Journal article
BIBCODE:

2015A&C....12..133T

OTHER-ID:

11140799

Contributors: Thomas, B.; Jenness, T.; Economou, F.; Greenfield, P.; Hirst, P.; Berry, D. S.; Bray, E.; Gray, N.; Muna, D.; Turner, J. et al.
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NASA Astrophysics Data System

The Biases of Optical Line-Ratio Selection for Active Galactic Nuclei and the Intrinsic Relationship between Black Hole Accretion and Galaxy Star Formation

2015-09 | Journal article
OTHER-ID:

11121206

Contributors: Trump, Jonathan R.; Sun, Mouyuan; Zeimann, Gregory R.; Luck, Cuyler; Bridge, Joanna S.; Grier, Catherine J.; Hagen, Alex; Juneau, Stephanie; Montero-Dorta, Antonio; Rosario, David J. et al.
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NASA Astrophysics Data System
grade
Preferred source (of 2)‎

The Evolution of the Far-UV Luminosity Function and Star Formation Rate Density of the Chandra Deep Field South from z = 0.2 to 1.2 with Swift/UVOT

2015-08 | Journal article
OTHER-ID:

11089797

Contributors: Hagen, Lea M. Z.; Hoversten, Erik A.; Gronwall, Caryl; Wolf, Christopher; Siegel, Michael H.; Page, Mathew; Hagen, Alex
Source: check_circle
NASA Astrophysics Data System
grade
Preferred source (of 2)‎

Surveying Galaxy Proto-clusters in Emission: A Large-scale Structure at z = 2.44 and the Outlook for HETDEX

2015-07 | Journal article
OTHER-ID:

11054307

Contributors: Chiang, Yi-Kuan; Overzier, Roderik A.; Gebhardt, Karl; Finkelstein, Steven L.; Chiang, Chi-Ting; Hill, Gary J.; Blanc, Guillermo A.; Drory, Niv; Chonis, Taylor S.; Zeimann, Gregory R. et al.
Source: check_circle
NASA Astrophysics Data System

Corrigendum to "Spectroscopic needs for imaging dark energy experiments" [Astropart. Phys. 63 (2015) 81-100]

2015-05 | Journal article
OTHER-ID:

10733995

Contributors: Newman, Jeffrey A.; Abate, Alexandra; Abdalla, Filipe B.; Allam, Sahar; Allen, Steven W.; Ansari, Réza; Bailey, Stephen; Barkhouse, Wayne A.; Beers, Timothy C.; Blanton, Michael R. et al.
Source: check_circle
NASA Astrophysics Data System

Spectroscopic needs for imaging dark energy experiments

2015-03 | Journal article
OTHER-ID:

2084420

Contributors: Newman, Jeffrey A.; Abate, Alexandra; Abdalla, Filipe B.; Allam, Sahar; Allen, Steven W.; Ansari, Réza; Bailey, Stephen; Barkhouse, Wayne A.; Beers, Timothy C.; Blanton, Michael R. et al.
Source: check_circle
NASA Astrophysics Data System

Physical and Morphological Properties of [O II] Emitting Galaxies in the HETDEX Pilot Survey

2015-02 | Journal article
OTHER-ID:

10601201

Contributors: Bridge, Joanna S.; Gronwall, Caryl; Ciardullo, Robin; Hagen, Alex; Zeimann, Greg; Malz, A. I.; Acquaviva, Viviana; Schneider, Donald P.; Drory, Niv; Gebhardt, Karl et al.
Source: check_circle
NASA Astrophysics Data System

Hubble Space Telescope Emission-line Galaxies at z ~ 2: The Mystery of Neon

2015-01 | Journal article
OTHER-ID:

10592626

Contributors: Zeimann, Gregory R.; Ciardullo, Robin; Gebhardt, Henry; Gronwall, Caryl; Hagen, Alex; Trump, Jonathan R.; Bridge, Joanna S.; Luo, Bin; Schneider, Donald P.
Source: check_circle
NASA Astrophysics Data System

TO STACK OR NOT TO STACK: SPECTRAL ENERGY DISTRIBUTION PROPERTIES OF Lyα-EMITTING GALAXIES AT z = 2.1

2014 | Journal article
DOI:

10.1088/0004-637x/783/1/26

Part of ISSN:

0004-637X

Source: Self-asserted source
Alex Hagen via Crossref Metadata Search
grade
Preferred source (of 2)‎

Hubble Space Telescope Emission Line Galaxies at z ~ 2: The Lyα Escape Fraction

2014-11 | Journal article
OTHER-ID:

2050327

Contributors: Ciardullo, Robin; Zeimann, Gregory R.; Gronwall, Caryl; Gebhardt, Henry; Schneider, Donald P.; Hagen, Alex; Malz, A. I.; Blanc, Guillermo A.; Hill, Gary J.; Drory, Niv et al.
Source: check_circle
NASA Astrophysics Data System

3D-HST Emission Line Galaxies at z ~ 2: Discrepancies in the Optical/UV Star Formation Rates

2014-08 | Journal article
OTHER-ID:

2049322

Contributors: Zeimann, Gregory R.; Ciardullo, Robin; Gebhardt, Henry; Gronwall, Caryl; Schneider, Donald P.; Hagen, Alex; Bridge, Joanna S.; Feldmeier, John; Trump, Jonathan R.
Source: check_circle
NASA Astrophysics Data System

The HETDEX Pilot Survey. V. The Physical Origin of Lyα Emitters Probed by Near-infrared Spectroscopy

2014-08 | Journal article
OTHER-ID:

2049277

Contributors: Song, Mimi; Finkelstein, Steven L.; Gebhardt, Karl; Hill, Gary J.; Drory, Niv; Ashby, Matthew L. N.; Blanc, Guillermo A.; Bridge, Joanna; Chonis, Taylor; Ciardullo, Robin et al.
Source: check_circle
NASA Astrophysics Data System

SPECTRAL ENERGY DISTRIBUTION FITTING OF HETDEX PILOT SURVEY Lyα EMITTERS IN COSMOS AND GOODS-N

ApJ
2014-05-01 | Journal article
DOI:

10.1088/0004-637x/786/1/59

Part of ISSN:

0004-637X

Contributors: Alex Hagen; Robin Ciardullo; Caryl Gronwall; Viviana Acquaviva; Joanna Bridge; Gregory R. Zeimann; Guillermo A. Blanc; Nicholas A. Bond; Steven L. Finkelstein; Mimi Song et al.
Source: Self-asserted source
Alex Hagen via Crossref Metadata Search
grade
Preferred source (of 2)‎

Studying Gender in Conference Talks -- data from the 223rd meeting of the American Astronomical Society

2014-03 | Journal article
OTHER-ID:

10547394

Contributors: Davenport, James R. A.; Fouesneau, Morgan; Grand, Erin; Hagen, Alex; Poppenhaeger, Katja; Watkins, Laura L.
Source: check_circle
NASA Astrophysics Data System

Galaxy redshift surveys with sparse sampling

2013 | Journal article
DOI:

10.1088/1475-7516/2013/12/030

Part of ISSN:

1475-7516

Source: Self-asserted source
Alex Hagen via Crossref Metadata Search

SEARCHING FOR NEUTRAL HYDROGEN HALOS AROUND z ∼ 2.1 AND z ∼ 3.1 Lyα EMITTING GALAXIES

2013 | Journal article
DOI:

10.1088/0004-637x/776/2/75

Part of ISSN:

0004-637X

Source: Self-asserted source
Alex Hagen via Crossref Metadata Search
grade
Preferred source (of 2)‎

THE SPECTRALLY RESOLVED Lyα EMISSION OF THREE Lyα-SELECTED FIELD GALAXIES AT z ∼ 2.4 FROM THE HETDEX PILOT SURVEY

2013 | Journal article
DOI:

10.1088/0004-637x/775/2/99

Part of ISSN:

0004-637X

Source: Self-asserted source
Alex Hagen via Crossref Metadata Search
grade
Preferred source (of 2)‎

MID-INFRARED PHOTOMETRIC ANALYSIS OF MAIN BELT ASTEROIDS: A TECHNIQUE FOR COLOR-COLOR DIFFERENTIATION FROM BACKGROUND ASTROPHYSICAL SOURCES

2010 | Journal article
DOI:

10.1088/0004-637x/720/1/114

Part of ISSN:

0004-637X

Source: Self-asserted source
Alex Hagen via Crossref Metadata Search