US 3215: An active gE2 galaxy

Steve B. Howell; Joseph E. Pesce; J. J. Condon; Robin Ciardullo; P. D. Usher

doi:10.1086/133988

US 3215: An active gE2 galaxy

Steve B. Howell, Joseph E. Pesce, J. J. Condon, Robin Ciardullo, P. D. Usher

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2 Scopus citations

Abstract

The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H₀ = 50 km s^-1 Mpc^-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam^-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.

Original language	English (US)
Pages (from-to)	1149-1153
Number of pages	5
Journal	Publications of the Astronomical Society of the Pacific
Volume	109
Issue number	740
DOIs	https://doi.org/10.1086/133988
State	Published - Oct 1997

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/133988

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@article{fc76d898a79b42a984bef9aeb18065e6,

title = "US 3215: An active gE2 galaxy",

abstract = "The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H0 = 50 km s-1 Mpc-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.",

author = "Howell, {Steve B.} and Pesce, {Joseph E.} and Condon, {J. J.} and Robin Ciardullo and Usher, {P. D.}",

year = "1997",

month = oct,

doi = "10.1086/133988",

language = "English (US)",

volume = "109",

pages = "1149--1153",

journal = "Publications of the Astronomical Society of the Pacific",

issn = "0004-6280",

publisher = "University of Chicago",

number = "740",

}

TY - JOUR

T1 - US 3215

T2 - An active gE2 galaxy

AU - Howell, Steve B.

AU - Pesce, Joseph E.

AU - Condon, J. J.

AU - Ciardullo, Robin

AU - Usher, P. D.

PY - 1997/10

Y1 - 1997/10

N2 - The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H0 = 50 km s-1 Mpc-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.

AB - The object US 3215 is an optically variable galaxy with very broad Balmer lines, relatively strong forbidden lines, and a weak UV-excess continuum. It has been classed as a Seyfert 1 galaxy. We report that optical CCD images taken in excellent seeing reveal a central miniquasar in an elliptical galaxy with a de Vaucouleurs profile extending across an angular diameter of ∼ 13 arcsec. This corresponds to a linear size of almost 50 kpc (H0 = 50 km s-1 Mpc-1). Our data indicate that the host galaxy is of type gE2 and is the gravitational center of a cluster of galaxies. A companion galaxy is observed at a projected distance of 24 kpc. H and K magnitudes were obtained and the index H-K is consistent with quasar colors. A VLA snapshot at 1425 MHz gives an upper limit to radio emission at a flux level of 0.2 mJy beam-1 that is consistent with the Sy 1 designation. Thus US 3215 appears to be an active broad-line cluster gE2 galaxy.

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UR - http://www.scopus.com/inward/citedby.url?scp=0031485236&partnerID=8YFLogxK

U2 - 10.1086/133988

DO - 10.1086/133988

M3 - Article

AN - SCOPUS:0031485236

SN - 0004-6280

VL - 109

SP - 1149

EP - 1153

JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

IS - 740

ER -

US 3215: An active gE2 galaxy

Abstract

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