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E+A galaxies are characterized as a galaxy with strong Balmer absorption lines but without any [OII] or H$\alpha$ emission lines. The existence of strong Balmer absorption lines means that E+A galaxies have experienced a starburst within…

Astrophysics · Physics 2008-11-26 Tomotsugu Goto

E+A galaxies are galaxies with strong Balmer absorption lines and with no significant emission in [OII] or H$\alpha$ lines. The existence of strong Balmer absorption lines shows that these galaxies have experienced a starburst within the…

Astrophysics · Physics 2007-05-23 Tomotsugu Goto , the SDSS collaboration

E+A galaxies are characterized as a galaxy with strong Balmer absorption lines but without any [OII] nor H$\alpha$ emission lines. The existence of strong Balmer absorption lines indicates that E+A galaxies have experienced starburst within…

Astrophysics · Physics 2009-11-10 Tomotsugu Goto

Post-starburst galaxies, or E+A galaxies, are characterized by optical spectra showing strong Balmer absorption lines, indicating a young stellar population, and little or no emission lines, implying no active star formation. These galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Martin A. Zwaan , Harald Kuntschner , Michael B. Pracy , Warrick J. Couch

E+A galaxies have been interpreted as post-starburst galaxies based on the presence of strong Balmer absorption lines combined with the absence of major emission lines ([OII] nor H$\alpha$). As a population of galaxies in the midst of the…

Astrophysics · Physics 2009-11-13 Tomotsugu Goto

Post-starburst (or "E+A") galaxies are characterized by low H$\alpha$ emission and strong Balmer absorption, suggesting a recent starburst, but little current star formation. Although many of these galaxies show evidence of recent mergers,…

Post-starburst (E+A or k+a) spectra, characterized by their exceptionally strong Balmer lines in absorption and the lack of emission lines, belong to galaxies in which the star formation activity ended abruptly sometime during the past Gyr.…

One important approach to the study of galaxy evolution is to identify those galaxies whose spectral and/or morphological characteristics suggest that they are in transition. For example, ``E+A'' galaxies, which have strong Balmer…

Astrophysics · Physics 2009-09-25 Ann I. Zabludoff

Strong Balmer absorption lines and the lack of Ha and [OII] emission lines signify that E+As are post-starburst systems. Recent studies suggest that E+As may undergo the transition from the `blue cloud' to the `red sequence' and eventually…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 Yumi Choi , Tomotsugu Goto , Suk-Jin Yoon

Post-starburst, or E+A galaxies, are the best candidates for galaxies in transition from being gas-rich and star-forming to gas-poor and passively-evolving via galaxy-galaxy mergers. To determine what E+A galaxies become after their young…

Astrophysics · Physics 2009-09-28 Yujin Yang , Ann Zabludoff , Dennis Zaritsky , Christopher Mihos

Brightest Cluster Galaxies (BCGs) are mostly elliptical galaxies and very rarely have prominent star formation. We found that five out of 8,812 BCGs are E+A (i.e. post-starburst) galaxies, having the H$\delta$~absorption line with an…

Astrophysics of Galaxies · Physics 2013-04-17 Feng-Shan Liu , Zhong-Lue Wen , Jin-Lin Han , Xian-Min Meng

We present the results of HI line and radio continuum observations of five nearby E+A galaxies. These galaxies have spectra that are dominated by a young stellar component but lack the emission lines characteristic of significant, on-going…

Approximately half of the nearby E+A galaxies followed up with 21-cm observations have detectable HI emission. The optical spectra of these galaxies show strong post-starburst stellar populations but no optical emission lines implying…

Astrophysics of Galaxies · Physics 2015-06-22 Michael Pracy , Matt Owers , Martin Zwaan , Warrick Couch , Harald Kuntschner , Scott Croom , Elaine Sadler

We present three dimensional spectroscopy of eleven E+A galaxies, selected for their strong H-delta absorption but weak (or non-existent) [OII]3727 and H-alpha emission. This selection suggests that a recent burst of star-formation was…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-10 Mark Swinbank , Michael Balogh , Richard Bower , Ann Zabludoff , John Lucey , Sean McGee , Chris Miller , Robert Nichol

About 35 years ago a class of galaxies with unusually strong Balmer absorption lines and weak emission lines was discovered in distant galaxy clusters. These objects, alternatively referred to as post-starburst, E+A or k+a galaxies, are now…

Astrophysics of Galaxies · Physics 2019-03-27 M. M. Pawlik , S. McAlpine , J. W. Trayford , V. Wild , R. Bower , R. A. Crain , M. Schaller , J. Schaye

We present deep single-dish HI observations of a sample of six nearby E+A galaxies (0.05<z<0.1). A non-negligible fraction of a local sample of E+As are detected in HI. In four galaxies, we have detected up to a few times 10^9 Msun of…

Astrophysics · Physics 2008-11-26 P. Buyle , D. Michielsen , S. De Rijcke , D. J. Pisano , H. Dejonghe , K. Freeman

Post-starburst galaxies are believed to be in a rapid transition between major merger starbursts and quiescent ellipticals. Their optical spectrum is dominated by A-type stars, suggesting a starburst that was quenched recently. While…

Astrophysics of Galaxies · Physics 2023-07-26 Dalya Baron , Hagai Netzer , K. Decker French , Dieter Lutz , Ric I. Davies , J. Xavier Prochaska

[Abridged] We present here a new and homogeneous sample of 3340 galaxies selected from the Sloan Digital Sky Survey (SDSS) based solely on the observed strength of their Hdelta absorption line. These galaxies are commonly known as…

Post-starburst or "E+A" galaxies are rapidly transitioning from star-forming to quiescence. While the current star formation rate of post-starbursts is already at the level of early type galaxies, we recently discovered that many have large…

The traditional picture of post-starburst galaxies as dust- and gas-poor merger remnants, rapidly transitioning to quiescence, has been recently challenged. Unexpected detections of a significant ISM in many post-starbursts raise important…

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