J/A+A/650/A76 HI content in Coma cluster substructure (Healy+, 2021)
H I content in Coma cluster substructure.
Healy J., Blyth S-L., Verheijen M.A.W., Hess K.M., Serra P.,
van der Hulst J.M., Jarrett T.H., Yim K., Jozsa G.I.G.
<Astron. Astrophys. 650, A76 (2021)>
=2021A&A...650A..76H 2021A&A...650A..76H (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Redshifts ; H I data
Keywords: galaxies: clusters: general - galaxies: evolution -
galaxies: groups: general - galaxies: general
Abstract:
Galaxy clusters are some of largest structures in the universe. These
very dense environments tend to be home to higher numbers of evolved
galaxies than found in lower-density environments. It is well known
that dense environments can influence the evolution of galaxies
through the removal of the neutral gas (HI) reservoirs that fuel star
formation. It is unclear which environment has a stronger effect: the
local environment (i.e. the substructure within the cluster), or the
cluster itself. Using the new HI data from the Westerbork Coma
Survey, we explore the average HI content of galaxies across the
cluster comparing galaxies that reside in substructure to those that
do not. We applied the Dressler-Shectman test to our newly compiled
redshift catalogue of the Coma cluster to search for substructure.
With so few of the Coma galaxies directly detected in HI, we used the
HI stacking technique to probe the average HI content below what can
be directly detected. Using the Dressler-Shectman test, we find 15
substructures within the footprint of the Westerbork Coma Survey. We
compare the average HI content for galaxies within substructure to
those not in substructure. Using the HI stacking technique, we find
that those Coma galaxies not detected in HI are more than 10-50
times more HI deficient than expected, which supports the scenario of
an extremely efficient and rapid quenching mechanism. By studying the
galaxies that are not directly detected in HI, we also find Coma to
be more HI deficient than previously thought.
Description:
New spectroscopic data for galaxies in the Coma cluster was obtained
using Hydra, the multi-object spectrograph, on the 3.5m WIYN Telescope
located at the Kitt Peak National Observatory.
The data were collected on the nights of 19-20 April 2018.
In this work we have aimed to study the average HI content and
morphologies of galaxies in the substructure of the Coma cluster. We
have collated a large catalogue of redshifts for the Coma cluster,
including 59 new redshifts that we observed with the multi-object
spectrometer, Hydra, at WIYN. Using the newly compiled catalogue, we
applied the DS test to find substructure within the cluster. Fifteen
substructures were found, of which three had not been previously
identified.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
coma.dat 208 850 Catalogue of Coma galaxies within the
Westerbork Coma Survey
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Byte-by-byte Description of file: coma.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- ID Galaxy nickname in data file
22- 23 I2 h RAh Right Ascension (J2000)
25- 26 I2 min RAm Right Ascension (J2000)
28- 31 F4.1 s RAs Right Ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 43 F4.1 arcsec DEs Declination (J2000)
45- 51 F7.5 --- z Redshift
53- 59 F7.5 --- e_z Redshift error
61- 65 F5.2 arcsec R25 ?=- Isophotal radius at 25 mag/arcsec2 in
B-band
67- 70 F4.2 --- n ?=- Sersic index in r-band
72- 75 F4.2 --- b/a ?=- Axis ratio in r-band
77- 83 F7.2 deg PA []?=- Position angle in r-band
85- 89 F5.2 mag FUV ?=- FUV magnitude from GalfitM
91- 95 F5.2 mag NUV ?=- NUV magnitude from GalfitM
97-101 F5.2 mag umag ?=- u magnitude from GalfitM
103-107 F5.2 mag gmag ?=- g magnitude from GalfitM
109-113 F5.2 mag rmag ?=- r magnitude from GalfitM
115-119 F5.2 mag imag ?=- i magnitude from GalfitM
121-125 F5.2 mag zmag ?=- z magnitude from GalfitM
127-131 F5.2 mag W1mag ?=- W1 magnitude from GalfitM
133-137 F5.2 mag W2mag ?=- W2 magnitude from GalfitM
139-143 F5.2 mag W3mag ?=- W3 magnitude from GalfitM
145-149 F5.2 mag W4mag ?=- W4 magnitude from GalfitM
153-157 F5.2 [Msun] logMass ?=- WISE-based stellar mass
159-162 F4.2 [Msun] e_logMass ?=- log error on stellar mass
164 A1 --- l_SFR Limit flag on SFR
165-169 F5.2 Msun/yr SFR ?=- W3 star formation rate
171-174 F4.2 Msun/yr e_SFR ?=- Error on star formation rate
177 A1 --- l_logMassHI Limit flag on logMassHI
178-181 F4.2 [Msun] logMassHI Calculated HI mass
183-208 A26 --- r_z Redshift reference (1)
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Acknowledgements:
Julia Healy, juliahealyza(at)gmail.com
(End) Patricia Vannier [CDS] 08-Mar-2021